[Federal Register Volume 78, Number 89 (Wednesday, May 8, 2013)]
[Proposed Rules]
[Pages 26720-26727]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2013-10905]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2013-0366; Directorate Identifier 2011-NM-024-AD]
RIN 2120-AA64
Airworthiness Directives; The Boeing Company Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: We propose to supersede an existing airworthiness directive
(AD) that applies to certain The Boeing Company Model 747-100, 747-
100B, 747-100B SUD, 747-200B, 747-200C, 747-300, 747-400, 747-400D, and
747SR series airplanes. The existing AD requires, for certain
airplanes, inspection to determine the material of a main entry door
(MED) reveal; repetitive inspections of certain reveals for cracking; a
detailed inspection of certain reveals for a sharp edge and cracking;
and corrective action if necessary. That AD also allows a certain
replacement as an optional action for certain inspections of certain
airplanes. Since we issued that AD, an operator reported a crack found
in a 6061 machined aluminum one-piece corner reveal. This proposed AD
would add, for certain airplanes, an inspection to determine material
type of MED reveals, repetitive inspections for cracking of 6061
machined aluminum one-piece corner reveals, and replacement with 6061
machined aluminum two-piece corner reveals if necessary. This
[[Page 26721]]
proposed AD would also allow replacement with two-piece corner reveals
as an option for certain repetitive inspections. This proposed AD would
also revise the applicability by removing a certain airplane. We are
proposing this AD to detect and correct fatigue cracking of the lower
forward corner reveal of the number 3 MEDs, which could lead to the
door escape slide departing the airplane when the door is opened and
the slide is deployed, and consequent injuries to passengers and crew
using the door escape slide during an emergency evacuation.
DATES: We must receive comments on this proposed AD by June 24, 2013.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
Fax: 202-493-2251.
Mail: U.S. Department of Transportation, Docket
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New
Jersey Avenue SE., Washington, DC 20590.
Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
For service information identified in this proposed AD, contact
Boeing Commercial Airplanes, Attention: Data & Services Management, P.
O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone 206-
544-5000, extension 1; fax 206-766-5680; Internet https://www.myboeingfleet.com. You may review copies of the referenced service
information at the FAA, Transport Airplane Directorate, 1601 Lind
Avenue SW., Renton, Washington. For information on the availability of
this material at the FAA, call 425-227-1221.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov; or in person at the Docket Management Facility
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this proposed AD, the regulatory
evaluation, any comments received, and other information. The street
address for the Docket Office (phone: 800-647-5527) is in the ADDRESSES
section. Comments will be available in the AD docket shortly after
receipt.
FOR FURTHER INFORMATION CONTACT: Bill Ashforth, Aerospace Engineer,
Airframe Branch, ANM-120S, FAA, Seattle Aircraft Certification Office
(ACO), 1601 Lind Avenue SW., Renton, WA 98057-3356; phone: (425) 917-
6432; fax: (425) 917-6590; email: [email protected].
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to send any written relevant data, views, or
arguments about this proposed AD. Send your comments to an address
listed under the ADDRESSES section. Include ``Docket No. FAA-2013-0366;
Directorate Identifier 2011-NM-024-AD'' at the beginning of your
comments. We specifically invite comments on the overall regulatory,
economic, environmental, and energy aspects of this proposed AD. We
will consider all comments received by the closing date and may amend
this proposed AD because of those comments.
We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We
will also post a report summarizing each substantive verbal contact we
receive about this proposed AD.
Discussion
On August 20, 2008, we issued AD 2008-18-07, Amendment 39-15664 (73
FR 56960, October 1, 2008), for certain The Boeing Company Model 747-
100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-300, 747-400, 747-
400D, and 747SR series airplanes. The existing AD requires, for certain
airplanes, an inspection to determine the material of an MED reveal;
repetitive inspections of certain reveals for cracking; a detailed
inspection of certain reveals for a sharp edge and cracking; and
corrective action if necessary. That AD also allows a certain
replacement as an optional action for certain inspections of certain
airplanes. The existing AD resulted from reports of cracking and/or a
sharp edge in the lower forward corner reveal of the number 3 MEDs. We
issued that AD to detect and correct fatigue cracking of the lower
forward corner reveal of the number 3 MEDs, which could lead to the
door escape slide departing the airplane when the door is opened and
the slide is deployed, and possible consequent injuries to passengers
and crew using the door escape slide during an emergency evacuation.
Actions Since Existing AD (73 FR 56960, October 1, 2008) Was Issued
Since we issued AD 2008-18-07, Amendment 39-15664 (73 FR 56960,
October 1, 2008), an operator reported a crack found in a 6061 machined
aluminum one-piece corner reveal. Certain airplanes were equipped with
either 356 cast aluminum or 6061 machined aluminum one-piece corner
reveals at delivery. The existing AD allowed 356 cast aluminum reveals
to be replaced with one-piece machined aluminum corner reveals. We have
determined that inspections are necessary on airplanes having these
one-piece reveals.
Relevant Service Information
AD 2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008),
referred to Boeing Special Attention Service Bulletin 747-53-2460,
Revision 1, dated February 13, 2007, as the appropriate source of
service information for the required actions. Boeing has since revised
this service information.
We reviewed Boeing Special Attention Service Bulletin 747-53-2460,
Revision 2, dated December 22, 2010. No new airplanes were added to the
effectivity of Boeing Special Attention Service Bulletin 747-53-2460,
Revision 2, dated December 22, 2010, but airplane groups were changed
based on the material composition of the corner reveals. This service
information describes procedures for a material type inspection of one-
piece or two-piece corner reveals; inspection for sharp edges and
cracking; and replacement of reworked 356 cast aluminum corner reveals
and 6061 machined aluminum one-piece corner reveals with 6061 machined
aluminum two-piece corner reveals, which would eliminate the need for
repetitive inspections.
Boeing Special Attention Service Bulletin 747-53-2460, Revision 2,
dated December 22, 2010, also specifies a revised effectivity that
clarifies the cargo configuration exceptions by excluding airplanes
modified to the Boeing converted freighter and large cargo freighter
configurations and removing an exception for Groups 2 and 3 of
airplanes modified to the special freighter configuration. This service
information also removes line number (L/N) 1271, a Model 747-400F
series airplane, from the effectivity because it is a freighter
airplane.
FAA's Determination
We are proposing this AD because we evaluated all the relevant
information and determined the unsafe condition described previously is
likely to exist or develop in other products of the same type design.
Proposed AD Requirements
This proposed AD would retain all of the requirements of AD 2008-
18-07, Amendment 39-15664 (73 FR 56960,
[[Page 26722]]
October 1, 2008). The proposed AD would require the actions specified
in the service information described previously. The proposed AD would
add, for certain airplanes, an inspection to determine material type of
MED reveals, repetitive inspections for cracking of 6061 machined
aluminum one-piece corner reveals, and replacement with 6061 machined
aluminum two-piece corner reveals if necessary. This proposed AD would
also allow replacement with two-piece corner reveals as an option for
certain repetitive inspections. Also, the proposed AD would remove
airplane L/N 1271, a Model 747-400F series airplane, from the AD
applicability.
Changes To Existing AD (73 FR 56960, October 1, 2008)
This proposed AD would retain all of the requirements of AD 2008-
18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008). However, we
have removed the ``Service Bulletin Reference'' paragraph from this
proposed AD. That paragraph was identified as paragraph (f) in AD 2008-
18-07. That paragraph provided operators with a one-time citation of
the referenced service bulletin in AD 2008-18-07. Instead, we have
provided the full service bulletin citation throughout this proposed
AD.
We have revised the heading and wording for paragraph (l) of this
proposed AD, to clarify that the only exception to the procedures in
Boeing Special Attention Service Bulletin 747-53-2460, Revision 1,
dated February 13, 2007; and Boeing Special Attention Service Bulletin
747-53-2460, Revision 2, dated December 22, 2010; is that, as of the
effective date of this proposed AD, an operator's equivalent procedure
may no longer be used without requesting approval of an alternative
method of compliance (AMOC).
We have also re-designated Notes 1 and 2 of AD 2008-18-07,
Amendment 39-15664 (73 FR 56960, October 1, 2008), as paragraphs (p)
and (q) of this proposed AD. This change does not affect the intent of
those paragraphs.
Costs of Compliance
We estimate that this proposed AD affects 166 airplanes of U.S.
registry. We estimate the following costs to comply with this proposed
AD:
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost on U.S.
Action Labor cost Parts cost Cost per product operators
----------------------------------------------------------------------------------------------------------------
Material type inspection and 4 work-hours x $85 $0 $340 per inspection $40,460 per
inspection for cracks (retained per hour = $340 per cycle. inspection cycle.
actions from AD 2008-18-07, inspection cycle.
Amendment 39[dash]15664 (73 FR
56960, October 1, 2008)) (119
airplanes).
New Material type inspection and 14 work-hours x $85 $0 $1,190 per $197,540 per
inspection for cracks [new per hour = $1,190 inspection cycle. inspection cycle.
proposed action] (166 airplanes). per inspection
cycle.
----------------------------------------------------------------------------------------------------------------
We estimate the following costs to do any necessary on-condition
actions that would be required based on the results of the proposed
inspections. We have no way of determining the number of aircraft that
might need these actions:
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Action Labor cost Parts cost Cost per product
----------------------------------------------------------------------------------------------------------------
Corner reveal removal and replacement 17 work-hours x $85 per $9,525 $10,970 per inspection
[new proposed action]. hour = $1,445 per cycle.
inspection cycle.
----------------------------------------------------------------------------------------------------------------
Authority for This Rulemaking
Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, Section 106, describes the
authority of the FAA Administrator. Subtitle VII, Aviation Programs,
describes in more detail the scope of the Agency's authority.
We are issuing this rulemaking under the authority described in
Subtitle VII, Part A, Subpart III, Section 44701, ``General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.
Regulatory Findings
We have determined that this proposed AD would not have federalism
implications under Executive Order 13132. This proposed AD would not
have a substantial direct effect on the States, on the relationship
between the national Government and the States, or on the distribution
of power and responsibilities among the various levels of government.
For the reasons discussed above, I certify that the proposed
regulation:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979),
(3) Will not affect intrastate aviation in Alaska, and
(4) Will not have a significant economic impact, positive or
negative, on a substantial number of small entities under the criteria
of the Regulatory Flexibility Act.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Proposed Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA proposes to amend 14 CFR part 39 as follows:
PART 39--AIRWORTHINESS DIRECTIVES
0
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
[[Page 26723]]
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by removing airworthiness directive (AD)
2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008), and
adding the following new AD:
The Boeing Company: Docket No. FAA-2013-0366; Directorate Identifier
2011-NM-024-AD.
(a) Comments Due Date
The FAA must receive comments on this AD action by June 24,
2013.
(b) Affected ADs
This AD supersedes AD 2008-18-07, Amendment 39-15664 (73 FR
56960, October 1, 2008).
(c) Applicability
This AD applies to The Boeing Company Model 747-100, 747-100B,
747-100B SUD, 747-200B, 747-200C, 747-300, 747-400, 747-400D, and
747SR series airplanes, certificated in any category, as identified
in Boeing Special Attention Service Bulletin 747-53-2460, Revision
2, dated December 22, 2010, except airplanes that have been
converted to an all-cargo configuration. The requirements of this AD
also become applicable at the time when a converted airplane
operating in an all-cargo configuration is converted back to a
passenger or passenger/cargo configuration.
(d) Subject
Air Transport Association (ATA) of America Code 53: Fuselage.
(e) Unsafe Condition
This AD was prompted by a report of a crack found in a 6061
machined aluminum one-piece corner reveal. We are proposing this AD
to detect and correct fatigue cracking of the lower forward corner
reveal of the number 3 main entry doors (MEDs), which could lead to
the door escape slide departing the airplane when the door is opened
and the slide is deployed, and consequent injuries to passengers and
crew using the door escape slide during an emergency evacuation.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Retained Actions for Group 3 Airplanes
This paragraph restates the requirements of paragraph (g) of AD
2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008), with
revised service information. For airplanes identified as Group 3
airplanes in Boeing Special Attention Service Bulletin 747-53-2460,
Revision 1, dated February 13, 2007: Before the accumulation of
10,000 total flight cycles, or within 1,000 flight cycles after
November 5, 2008 (the effective date of AD 2008-18-07), whichever
occurs later, do a detailed inspection for cracking of the lower
forward corner reveals, in accordance with Part 8 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; or Part 2
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
As of the effective date of this AD, only Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010,
may be used to accomplish the actions required by this paragraph.
(1) If no cracking is found, repeat the inspection thereafter at
intervals not to exceed 6,000 flight cycles until a new or reworked
two-piece reveal is installed in accordance with Part 2 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; or Part 3
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
As of the effective date of this AD, only Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010,
may be used to accomplish the actions required by this paragraph. No
further action is required by this paragraph for that location only
after the replacement.
(2) If cracking is found, do the replacement specified in
paragraph (g)(2)(i) or (g)(2)(ii) of this AD.
(i) Before further flight, replace the reveal with a new or
reworked two-piece reveal, in accordance with Part 2 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; or Part 3
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
No further action is required by this paragraph for that location
only after the replacement. As of the effective date of this AD,
only Boeing Special Attention Service Bulletin 747-53-2460, Revision
2, dated December 22, 2010, may be used to accomplish the actions
required by this paragraph.
(ii) Before further flight, replace the reveal with a new or
reworked one-piece machined aluminum reveal without a sharp edge, in
accordance with Part 3 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 1, dated
February 13, 2007; or Part 4 of the Accomplishment Instructions of
Boeing Special Attention Service Bulletin 747-53-2460, Revision 2,
dated December 22, 2010. Before the accumulation of 10,000 flight
cycles since new on the replacement reveal, do the inspection for
cracking specified in Part 8 of the Accomplishment Instructions of
Boeing Special Attention Service Bulletin 747-53-2460, Revision 1,
dated February 13, 2007; or Part 2 of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 747-53-
2460, Revision 2, dated December 22, 2010. Repeat the inspection
thereafter at intervals not to exceed 6,000 flight cycles until a
new or reworked two-piece reveal is installed in accordance with
Part 2 of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 747-53-2460, Revision 1, dated February
13, 2007; or Part 3 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 2, dated
December 22, 2010. If any cracking is found during any inspection
required by this paragraph, before further flight, do the actions
specified in paragraph (g)(2) of this AD. No further action is
required by this paragraph for that location only after the
replacement with a two-piece reveal. As of the effective date of
this AD, only Boeing Special Attention Service Bulletin 747-53-2460,
Revision 2, dated December 22, 2010, may be used to accomplish the
actions required by this paragraph.
(h) Retained Actions for Group 2 Airplanes
This paragraph restates the requirements of paragraph (h) of AD
2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008), with
revised service information. For airplanes identified as Group 2
airplanes in Boeing Special Attention Service Bulletin 747-53-2460,
Revision 1, dated February 13, 2007; or Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010:
Before the accumulation of 1,500 total flight cycles, or within
1,000 flight cycles after November 5, 2008 (the effective date of AD
2008-18-07), whichever occurs later, do the inspection specified in
paragraph (j) of this AD.
(i) Retained Actions for Group 1, Configuration 2 Airplanes
This paragraph restates the requirements of paragraph (i) of AD
2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008), with
revised service information. For airplanes identified as Group 1,
Configuration 2 airplanes in Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; or Boeing
Special Attention Service Bulletin 747-53-2460, Revision 2, dated
December 22, 2010: Within 1,500 flight cycles after the lower
forward corner reveal was last replaced, or 1,000 flight cycles
after November 5, 2008 (the effective date of AD 2008-18-07),
whichever occurs later, do the inspection specified in paragraph (j)
of this AD.
(j) Retained Inspection for Cracking and Sharp Edge
This paragraph restates the requirements of paragraph (j) of AD
2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008), with
revised service information. At the applicable times specified in
paragraphs (h) and (i) of this AD: Do a detailed inspection of the
lower forward corner reveal for cracking and a sharp edge, in
accordance with Part 5 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 1, dated
February 13, 2007; or Part 1 and Part 2 of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 747-53-
2460, Revision 2, dated December 22, 2010. As of the effective date
of this AD, only Boeing Special Attention Service Bulletin 747-53-
2460, Revision 2, dated December 22, 2010, may be used to accomplish
the actions required by this paragraph.
(1) If no cracking and no sharp edge are found, before the
accumulation of 10,000 flight cycles on the lower forward corner
reveal since new, or within 6,000 flight
[[Page 26724]]
cycles after doing the inspection required by paragraph (j) of this
AD, whichever occurs later, do a detailed inspection for cracking,
in accordance with Part 8 of the Accomplishment Instructions of
Boeing Special Attention Service Bulletin 747-53-2460, Revision 1,
dated February 13, 2007; or Part 2 of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 747-53-
2460, Revision 2, dated December 22, 2010. Inspect thereafter at
intervals not to exceed 6,000 flight cycles, until a new or reworked
two-piece reveal is installed in accordance with Part 2 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; or Part 3
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
If any cracking is found during any inspection required by this
paragraph, before further flight, do the actions specified in
paragraph (j)(3) of this AD. No further action is required by this
paragraph for that location only after the replacement with a two-
piece reveal. As of the effective date of this AD, only Boeing
Special Attention Service Bulletin 747-53-2460, Revision 2, dated
December 22, 2010, may be used to accomplish the actions required by
this paragraph.
(2) If no cracking is found, but a sharp edge is found, do the
actions specified in paragraph (j)(2)(i) or (j)(2)(ii) of this AD.
(i) Before further flight, replace the lower forward corner
reveal with a new or reworked two-piece reveal, in accordance with
Part 2 of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 747-53-2460, Revision 1, dated February
13, 2007; or Part 3 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 2, dated
December 22, 2010. No further action is required by this paragraph
for that location only after the replacement. As of the effective
date of this AD, only Boeing Special Attention Service Bulletin 747-
53-2460, Revision 2, dated December 22, 2010, may be used to
accomplish the actions required by this paragraph.
(ii) Before further flight, replace the reveal with a new or
reworked one-piece machined aluminum reveal without a sharp edge, in
accordance with Part 3 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 1, dated
February 13, 2007; or Part 4 of the Accomplishment Instructions of
Boeing Special Attention Service Bulletin 747-53-2460, Revision 2,
dated December 22, 2010. Before the accumulation of 10,000 flight
cycles on the replacement reveal since new, do the inspection for
cracking, in accordance with Part 8 of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 747-53-
2460, Revision 1, dated February 13, 2007; or Part 2 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 2, dated December 22, 2010. Inspect
thereafter at intervals not to exceed 6,000 flight cycles, until a
new or reworked two-piece reveal is installed in accordance with
Part 2 of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 747-53-2460, Revision 1, dated February
13, 2007; or Part 3 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 2, dated
December 22, 2010. If any cracking is found during any inspection
required by this paragraph, before further flight, do the actions
specified in paragraph (j)(3) of this AD. No further action is
required by this paragraph for that location only after the
replacement with a two-piece reveal. As of the effective date of
this AD, only Boeing Special Attention Service Bulletin 747-53-2460,
Revision 2, dated December 22, 2010, may be used to accomplish the
actions required by this paragraph.
(3) If cracking is found, do the actions specified in paragraph
(j)(3)(i) or (j)(3)(ii) of this AD.
(i) Before further flight, replace the reveal with a new or
reworked two-piece reveal, in accordance with Part 2 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; or Part 3
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
No further action is required by this paragraph for that location
only after the replacement. As of the effective date of this AD,
only Boeing Special Attention Service Bulletin 747-53-2460, Revision
2, dated December 22, 2010, may be used to accomplish the actions
required by this paragraph.
(ii) Before further flight, replace the lower forward corner
reveal with a new or reworked one-piece machined aluminum reveal
without a sharp edge, in accordance with Part 3 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; or Part 4
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
Before the accumulation of 10,000 flight cycles since new on the
replacement reveal, do the inspection for cracking, in accordance
with Part 8 of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 747-53-2460, Revision 1, dated February
13, 2007; or Part 2 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 2, dated
December 22, 2010. Inspect thereafter at intervals not to exceed
6,000 flight cycles, until a new or reworked two-piece reveal is
installed in accordance with Part 2 of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 747-53-
2460, Revision 1, dated February 13, 2007; or Part 3 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 2, dated December 22, 2010. If any
cracking is found during any inspection required by this paragraph,
before further flight, do the actions required by paragraph (j)(3)
of this AD. No further action is required by this paragraph for that
location only after the replacement with a two-piece reveal. As of
the effective date of this AD, only Boeing Special Attention Service
Bulletin 747-53-2460, Revision 2, dated December 22, 2010, may be
used to accomplish the actions required by this paragraph.
(k) Retained Actions for Group 1, Configuration 1 Airplanes
This paragraph restates the requirements of paragraph (k) of AD
2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008), with
revised service information. For airplanes identified as Group 1,
Configuration 1 airplanes in Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007: Before
the accumulation of 1,500 total flight cycles, or within 1,000
flight cycles after November 5, 2008 (the effective date of AD 2008-
18-07), whichever occurs later, do a material type inspection to
determine if the lower forward corner reveals are castings, in
accordance with Part 1 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 1, dated
February 13, 2007; or Part 6 of the Accomplishment Instructions of
Boeing Special Attention Service Bulletin 747-53-2460, Revision 2,
dated December 22, 2010. As an alternative to the material type
inspection, replacing a reveal with a new or reworked two-piece
lower forward corner reveal, in accordance with Part 2 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; or Part 3
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010;
is terminating action for the requirements of this paragraph for
that location only. As of the effective date of this AD, only Boeing
Special Attention Service Bulletin 747-53-2460, Revision 2, dated
December 22, 2010, may be used to accomplish the actions required by
this paragraph.
(1) If the forward corner reveal is not a casting: Before
further flight, do the actions specified in paragraph (j) of this AD
except for the inspection for a sharp edge.
(2) If the forward corner reveal is a casting: Before the
accumulation of 7,000 total flight cycles, within 2,000 flight
cycles after November 5, 2008 (the effective date of AD 2008-18-07),
or within 3,000 flight cycles since the forward corner reveal was
inspected as specified in Boeing Service Bulletin 747-53A2378,
Revision 3, dated August 11, 2005; or Boeing Service Bulletin 747-
53A2378, Revision 4, dated June 10, 2010; whichever occurs latest;
do a detailed inspection for cracking of the lower forward corner
reveal, in accordance with Part 1 of the Accomplishment Instructions
of Boeing Special Attention Service Bulletin 747-53-2460, Revision
1, dated February 13, 2007; or Part 2 of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 747-53-
2460, Revision 2, dated December 22, 2010. As of the effective date
of this AD, only Boeing Special Attention Service Bulletin 747-53-
2460, Revision 2, dated December 22, 2010, may be used to accomplish
the actions required by this paragraph.
[[Page 26725]]
(i) If no cracking is found: Repeat the inspection specified in
paragraph (k)(2) of this AD thereafter at intervals not to exceed
3,000 flight cycles until a new or reworked two-piece lower forward
corner reveal is installed in accordance with Part 2 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; or Part 3
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
No further action is required by this paragraph for that location
only after the replacement.
(ii) If cracking is found: Do the actions specified in paragraph
(k)(2)(ii)(A), (k)(2)(ii)(B), or (k)(2)(ii)(C) of this AD.
(A) Before further flight, weld repair the reveal, in accordance
with Part 4 of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 747-53-2460, Revision 1, dated February
13, 2007; or Part 4 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 2, dated
December 22, 2010. Repeat the inspection specified in paragraph
(k)(2) of this AD thereafter at intervals not to exceed 3,000 flight
cycles until a new or reworked two-piece reveal is installed in
accordance with Part 2 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 1, dated
February 13, 2007; or Part 3 of the Accomplishment Instructions of
Boeing Special Attention Service Bulletin 747-53-2460, Revision 2,
dated December 22, 2010. No further action is required by this
paragraph for that location only after the replacement. As of the
effective date of this AD, only Boeing Special Attention Service
Bulletin 747-53-2460, Revision 2, dated December 22, 2010, may be
used to accomplish the actions required by this paragraph.
(B) Before further flight, replace the reveal with a new or
reworked two-piece reveal, in accordance with Part 2 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; or Part 3
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
No further action is required by this paragraph for that location
only after the replacement. As of the effective date of this AD,
only Boeing Special Attention Service Bulletin 747-53-2460, Revision
2, dated December 22, 2010, may be used to accomplish the actions
required by this paragraph.
(C) Before further flight, replace the reveal with a new or
reworked one-piece machined aluminum reveal without a sharp edge, in
accordance with Part 3 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 1, dated
February 13, 2007; or Part 4 of the Accomplishment Instructions of
Boeing Special Attention Service Bulletin 747-53-2460, Revision 2,
dated December 22, 2010. Before the accumulation of 10,000 flight
cycles since new on the replacement reveal, do the inspection for
cracking, in accordance with Part 8 of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 747-53-
2460, Revision 1, dated February 13, 2007; or Part 2 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 2, dated December 22, 2010. Inspect
thereafter at intervals not to exceed 6,000 flight cycles, until a
new or reworked two-piece reveal is installed in accordance with
Part 2 of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 747-53-2460, Revision 1, dated February
13, 2007; or Part 3 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 2, dated
December 22, 2010. If any cracking is found during any inspection
required by this paragraph, before further flight, do the actions
specified in paragraph (k)(2)(ii)(B) or (k)(2)(ii)(C) of this AD. No
further action is required by this paragraph for that location only
after the replacement with a two-piece reveal. As of the effective
date of this AD, only Boeing Special Attention Service Bulletin 747-
53-2460, Revision 2, dated December 22, 2010, may be used to
accomplish the actions required by this paragraph.
(l) Retained Requirement Regarding Operator's Equivalent Procedure
This paragraph restates the requirements of paragraph (l) of AD
2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008).
Although Step 5 of Figure 8 of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007, specifies
that operators may accomplish the actions in accordance with ``an
operator's equivalent procedure,'' this AD does not allow using an
``operator equivalent procedure unless approved as an alternative
method of compliance in accordance with paragraph (w) of this AD.
(m) Retained Provisions for Compliance With AD 2007-12-11, Amendment
39-15089 (72 FR 31984, June 11, 2007), for MED 3 Only
This paragraph restates the provisions of paragraph (m) of AD
2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008), with
revised information. Accomplishment of the applicable repair
required by AD 2008-18-07, Amendment 39-15664 (73 FR 56960, October
1, 2008), constitutes compliance with the repair of the lower
forward corner casting (reveal) of the number 3 MEDs only, as
required by paragraph (q)(2)(ii) of AD 2007-12-11, Amendment 39-
15089 (72 FR 31984, June 11, 2007), which specifies the actions must
be done in accordance with Boeing Service Bulletin 747-53A2378,
Revision 1, dated March 10, 1994; Boeing Service Bulletin 747-
53A2378, Revision 3, dated August 11, 2005; or Boeing Service
Bulletin 747-53A2378, Revision 4, dated June 10, 2010. As of the
effective date of this AD, only Boeing Service Bulletin 747-53A2378,
Revision 4, dated June 10, 2010, may be used to accomplish the
actions specified in this paragraph. Accomplishment of the actions
of this AD does not terminate the remaining requirements of AD 2007-
12-11.
(n) Retained Parts Installation Prohibition (Cast 356 Aluminum) Reveals
This paragraph restates the requirement of paragraph (n) of AD
2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008). As of
November 5, 2008 (the effective date of AD 2008-18-07), no person
may install a door lower forward corner reveal made of cast 356
aluminum on any airplane at a location specified by AD 2008-18-07.
(o) Retained Parts Installation Limitation (Machined 6061 Aluminum)
Reveals
This paragraph restates the limitation specified by paragraph
(o) of AD 2008-18-07, Amendment 39-15664 (73 FR 56960, October 1,
2008), with revised service information. As of November 5, 2008 (the
effective date of AD 2008-18-17), no person may install a door lower
forward corner reveal made of machined 6061 aluminum on any airplane
at a location specified by this AD, unless it has been confirmed/
reworked to be without a sharp edge, in accordance with Part 5 of
the Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; or Part 1
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
As of the effective date of this AD, only Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010,
may be used to accomplish the actions required by this paragraph.
(p) Retained Optional Rework of One-Piece and Two-Piece Machined 6061
Aluminum Reveals
This paragraph restates the information provided in ``Note 1''
of AD 2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008),
with revised information. For the purpose of this AD, a one-piece
machined 6061 aluminum reveal may be reworked into a two-piece
reveal in accordance with the Accomplishment Instructions of the
applicable service bulletin identified in paragraph of (p)(1) or
(p)(2) of this AD, after it was verified to be crack free and
without a sharp edge, or after it was confirmed to be crack free and
reworked to remove a sharp edge. As of the effective date of this
AD, only Boeing Special Attention Service Bulletin 747-53-2460,
Revision 2, dated December 22, 2010, may be used to accomplish the
actions provided by this paragraph.
(1) Boeing Special Attention Service Bulletin 747-53-2460,
Revision 1, dated February 13, 2007.
(2) Boeing Special Attention Service Bulletin 747-53-2460,
Revision 2, dated December 22, 2010.
(q) Retained Optional Rework of One-Piece 6061 Aluminum Reveals With a
Sharp Edge
This paragraph restates the information provided in ``Note 2''
of AD 2008-18-07, Amendment 39-15664 (73 FR 56960, October 1, 2008),
with revised service information. For the purpose of this AD, a one-
piece machined 6061 aluminum reveal with a sharp edge may be
reworked into a one-piece machined 6061 aluminum reveal without a
[[Page 26726]]
sharp edge, in accordance with Part 6 of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 747-53-
2460, Revision 1, dated February 13, 2007; or Part 1 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 2, dated December 22, 2010; after it
is confirmed to be crack free in accordance with Part 5 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007, or Part 2
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
After the sharp edge is removed, the one-piece machined 6061
aluminum reveal without a sharp edge may be further reworked into a
two-piece reveal, in accordance with Part 7 of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 747-53-
2460, Revision 1, dated February 13, 2007; or Part 5 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 2, dated December 22, 2010. As of the
effective date of this AD, only Boeing Special Attention Service
Bulletin 747-53-2460, Revision 2, dated December 22, 2010, may be
used to accomplish the actions specified by this paragraph.
(r) New Actions for Previously Inspected Group 4 Airplanes: Corner
Reveal Not Replaced, or Replaced With Two-Piece Reveal
For Group 4 airplanes identified in Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010,
that have been inspected previously in accordance with the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 1, dated February 13, 2007; and on
which the corner reveal either has not been replaced, or has been
replaced with a two-piece reveal that was made by reworking an
existing one-piece reveal: Before the accumulation of 7,000 total
flight cycles, or within 3,000 flight cycles after the most recent
inspection or rework done in accordance with Boeing Special
Attention Service Bulletin 747-53-2460, Revision 1, dated February
13, 2007; or Boeing Special Attention Service Bulletin 747-53-2460,
Revision 2, dated December 22, 2010; or within 1,000 flight cycles
after the effective date of this AD, whichever occurs latest; do a
material type inspection to determine if the corner reveal is a
casting, in accordance with Part 6 of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 747-53-
2460, Revision 2, dated December 22, 2010. Doing the inspection
specified in this paragraph terminates the inspections required by
paragraph (j) of this AD for these airplanes.
(1) If, during any inspection required by paragraph (r) of this
AD, any corner reveal is found to be a casting: Before further
flight, do a detailed inspection for cracking of the corner reveal,
in accordance with Part 2 of the Accomplishment Instructions of
Boeing Special Attention Service Bulletin 747-53-2460, Revision 2,
dated December 22, 2010; and repeat the inspection thereafter at
intervals not to exceed 3,000 flight cycles until a new two-piece
reveal in installed in accordance with the requirements of paragraph
(r)(1)(i) of this AD. If any cracking is found, do the actions
specified in paragraph (r)(1)(i) or (r)(1)(ii) of this AD.
(i) Replace the cast reveal with a new 6061 machined aluminum
two-piece corner reveal, before further flight, in accordance with
Part 3 of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 747-53-2460, Revision 2, dated December
22, 2010.
(ii) Repair all cracking, before further flight, in accordance
with Part 4 of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 747-53-2460, Revision 2, dated December
22, 2010.
(2) If, during any inspection required by paragraph (r) of this
AD, any one-piece corner reveal is found to be installed and is not
a casting: Before the accumulation of 10,000 total flight cycles; or
within 6,000 flight cycles after the most recent inspection done in
accordance with Boeing Special Attention Service Bulletin 747-53-
2460, Revision 1, dated February 13, 2007; or Boeing Special
Attention Service Bulletin 747-53-2460, Revision 2, dated December
22, 2010; whichever occurs later; do a detailed inspection of the
corner reveal for cracking, in accordance with Part 2 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 2, dated December 22, 2010. Repeat
the inspection for cracking thereafter at intervals not to exceed
6,000 flight cycles until the corner reveal is replaced with a 6061
machined aluminum two-piece corner reveal. If any cracking is found
during any inspection required by paragraph (r)(2) of this AD,
before further flight, replace the corner reveal with a 6061
machined aluminum two-piece corner reveal, in accordance with Part 3
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
(s) New Actions for Previously Inspected Group 4 Airplanes: Corner
Reveal Replaced With One-Piece Reveal
For Group 4 airplanes identified in Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010,
that have been inspected previously in accordance with Boeing
Service Bulletin 747-53-2460, Revision 1, dated February 13, 2007,
and on which the corner reveal has been replaced with a one-piece
reveal: Within 10,000 flight cycles after the date the reveal was
replaced with a one-piece corner reveal, do a detailed inspection
for cracking of the corner reveal, in accordance with Part 2 of the
Accomplishment Instructions of Boeing Special Attention Service
Bulletin 747-53-2460, Revision 2, dated December 22, 2010. Repeat
the inspection for cracking thereafter at intervals not to exceed
6,000 flight cycles until the corner reveal is replaced with a 6061
machined aluminum two-piece corner reveal, in accordance with the
requirements of paragraph (u) of this AD. If any cracking is found
during any inspection required this paragraph of this AD, before
further flight, replace the one-piece corner reveal with a 6061
machined aluminum two-piece corner reveal, in accordance with Part 3
of the Accomplishment Instructions of Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
(t) New Actions for Group 4 Airplanes: Not Previously Inspected or
Changed
For Group 4 airplanes identified in Boeing Special Attention
Service Bulletin 747-53-2460, Revision 2, dated December 22, 2010,
that have not been previously inspected or changed in accordance
with Boeing Special Attention Service Bulletin 747-53-2460, Revision
1, dated February 13, 2007: Before the accumulation of 1,500 total
flight cycles, or within 1,000 flight cycles after the effective
date of this AD, whichever occurs later, do a material type
inspection to determine if the lower forward corner reveal is made
from 6061 machined aluminum plate or 356 aluminum casting, in
accordance with Part 6 of the Accomplishment Instructions of Boeing
Special Attention Service Bulletin 747-53-2460, Revision 2, dated
December 22, 2010. Doing the inspection specified in this paragraph
terminates the inspections required by paragraph (j) of this AD for
these airplanes.
(1) If, during any inspection required by paragraph (t) of this
AD, any corner reveal is found to be a casting: Before the
accumulation of 7,000 total flight cycles; or within 2,000 flight
cycles after the effective date of this AD; or within 3,000 flight
cycles after the most recent inspection of the MED 3 corner reveal
was done in accordance with Boeing Service Bulletin 747-53A2378,
Revision 4, dated June 10, 2010; whichever occurs latest; do a
detailed inspection for cracking of the corner reveal, in accordance
with Part 2 of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 747-53-2460, Revision 2, dated December
22, 2010. Repeat the inspection for cracking thereafter at intervals
not to exceed 3,000 flight cycles until the corner reveal is
replaced with a 6061 machined aluminum two-piece corner reveal. If
any cracking is found during any inspection required by this
paragraph of this AD, before further flight, replace the casting
with a 6061 machined aluminum two-piece corner reveal, in accordance
with Part 3 of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 747-53-2460, Revision 2, dated December
22, 2010.
(2) If, during any inspection required by paragraph (t) of this
AD, a corner reveal is found that is not a casting: Before further
flight, do a detailed inspection for a sharp edge, in accordance
with Part 1 of the Accomplishment Instructions of Boeing Special
Attention Service Bulletin 747-53-2460, Revision 2, dated December
22, 2010; and do a detailed inspection for cracking of the corner
reveal, in accordance with Part 2 of the Accomplishment Instructions
of Boeing Special Attention Service Bulletin 747-53-2460, Revision
2, dated December 22, 2010. Repeat the inspection for cracking
thereafter at intervals not to exceed 6,000 flight cycles until the
corner reveal is replaced with a 6061 machined aluminum
[[Page 26727]]
two-piece corner reveal in accordance with the requirements of
paragraph (u) of this AD.
(i) If any sharp edge is found during any inspection required by
paragraph (t)(2) of this AD, before further flight, rework the
corner reveal, in accordance with Part 1 of the Accomplishment
Instructions of Boeing Special Attention Service Bulletin 747-53-
2460, Revision 2, dated December 22, 2010.
(ii) If any cracking is found during any inspection required by
paragraph (t)(2) of this AD, before further flight, replace the
corner reveal with a 6061 machined aluminum two-piece corner reveal,
in accordance with Part 3 of the Accomplishment Instructions of
Boeing Special Attention Service Bulletin 747-53-2460, Revision 2,
dated December 22, 2010.
(u) New Terminating Action for Repetitive Inspections
Installation of a 6061 machined aluminum two-piece corner reveal
in accordance with Part 3 of the Accomplishment Instructions of
Boeing Special Attention Service Bulletin 747-53-2460, Revision 2,
dated December 22, 2010, terminates the repetitive inspections
required by paragraphs (r), (s), and (t) of this AD.
(v) Credit for Previous Actions
This paragraph provides credit for actions required by
paragraphs (g) through (m) and (o) through (q) of this AD, if those
actions were performed before the effective date of this AD using
Boeing Special Attention Service Bulletin 747-53-2460, Revision 1,
dated February 13, 2007; or Boeing Service Bulletin 747-53A2378,
Revision 3, dated August 11, 2005; as applicable, which are not
incorporated by reference in this AD.
(w) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Seattle Aircraft Certification Office (ACO),
FAA, has the authority to approve AMOCs for this AD, if requested
using the procedures found in 14 CFR 39.19. In accordance with 14
CFR 39.19, send your request to your principal inspector or local
Flight Standards District Office, as appropriate. If sending
information directly to the manager of the ACO, send it to the
attention of the person identified in the Related Information
section of this AD. Information may be emailed to: [email protected].
(2) Before using any approved AMOC, notify your appropriate
principal inspector, or lacking a principal inspector, the manager
of the local flight standards district office/certificate holding
district office.
(3) An AMOC that provides an acceptable level of safety may be
used for any repair required by this AD if it is approved by the
Boeing Commercial Airplanes Organization Designation Authorization
(ODA) that has been authorized by the Manager, Seattle ACO, to make
those findings. For a repair method to be approved, the repair must
meet the certification basis of the airplane, and the approval must
specifically refer to this AD.
(4) AMOCs previously approved in accordance with AD 2008-18-07,
Amendment 39-15664 (73 FR 56960, October 1, 2008), are approved as
AMOCs for the corresponding requirements of this AD for Group 2 and
Group 3 airplanes identified in Boeing Special Attention Service
Bulletin 747-53-2460, Revision 2, dated December 22, 2010.
Previously approved AMOCs for Group 1 and Group 4 airplanes
identified in Boeing Special Attention Service Bulletin 747-53-2460,
Revision 2, dated December 22, 2010, are not approved for compliance
with the actions required by this AD.
(x) Related Information
(1) For more information about this AD, contact Bill Ashforth,
Aerospace Engineer, Airframe Branch, ANM-120S, FAA, Seattle Aircraft
Certification Office, 1601 Lind Avenue SW., Renton, WA 98057-3356;
phone: (425) 917-6432; fax: (425) 917-6590; email:
[email protected].
(2) For service information identified in this AD, contact
Boeing Commercial Airplanes, Attention: Data & Services Management,
P. O. Box 3707, MC 2H-65, Seattle, Washington 98124-2207; telephone
206-544-5000, extension 1; fax 206-766-5680; Internet https://www.myboeingfleet.com. You may review copies of the referenced
service information at the FAA, Transport Airplane Directorate, 1601
Lind Avenue SW., Renton, Washington. For information on the
availability of this material at the FAA, call 425-227-1221.
Issued in Renton, Washington, on April 26, 2013.
Ali Bahrami,
Manager, Transport Aircraft Directorate, Aircraft Certification
Service.
[FR Doc. 2013-10905 Filed 5-7-13; 8:45 am]
BILLING CODE 4910-13-P