[Federal Register Volume 72, Number 147 (Wednesday, August 1, 2007)]
[Proposed Rules]
[Pages 41963-41968]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: E7-14867]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2006-26710; Directorate Identifier 2006-NM-147-AD]
RIN 2120-AA64
Airworthiness Directives; Boeing Model 757 Airplanes
AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).
ACTION: Supplemental notice of proposed rulemaking (NPRM); reopening of
comment period.
-----------------------------------------------------------------------
SUMMARY: The FAA is revising an earlier proposed airworthiness
directive (AD) for all Boeing Model 757 airplanes. The original NPRM
would have required revising the Airworthiness Limitations (AWLs)
section of the Instructions for Continued Airworthiness by
incorporating new limitations for fuel tank systems to satisfy Special
Federal Aviation Regulation No. 88 requirements. The original NPRM also
would have required the initial inspection of certain repetitive
inspections specified in the AWLs to phase-in those inspections, and
repair if necessary. The original NPRM resulted from a design review of
the fuel tank systems. This action revises the original NPRM by
aligning the compliance time for revising the AWLs section with the
compliance date of the special maintenance program requirements,
updating the listing of applicable airplane maintenance manuals in
Appendix 1, and clarifying certain actions. We are proposing this
supplemental NPRM to prevent the potential for ignition sources inside
fuel tanks caused by latent failures, alterations, repairs, or
maintenance actions, which, in combination with flammable fuel vapors,
could result in a fuel tank explosion and consequent loss of the
airplane.
DATES: We must receive comments on this supplemental NPRM by August 27,
2007.
ADDRESSES: Use one of the following addresses to submit comments on
this supplemental NPRM.
DOT Docket Web site: Go to http://dms.dot.gov and follow
the instructions for sending your comments electronically.
Government-wide rulemaking Web site: Go to http://
www.regulations.gov and follow the instructions for sending your
comments electronically.
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.
Fax: (202) 493-2251.
Hand Delivery: Room W12-140 on the ground floor of the
West Building, 1200 New Jersey Avenue, SE., Washington, DC, between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
Contact Boeing Commercial Airplanes, P.O. Box 3707, Seattle,
Washington 98124-2207, for service information identified in this
proposed AD.
FOR FURTHER INFORMATION CONTACT: Kathrine Rask, Aerospace Engineer,
Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification
Office, 1601 Lind Avenue, SW., Renton, Washington 98057-3356; telephone
(425) 917-6505; fax (425) 917-6590.
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to submit any relevant written data, views, or
arguments regarding this supplemental NPRM. Send your comments to an
address listed in the ADDRESSES section. Include the docket number
``Docket No. FAA-2006-26710; Directorate Identifier 2006-NM-147-AD'' at
the beginning of your comments. We specifically invite comments on the
overall regulatory, economic, environmental, and energy aspects of this
supplemental NPRM. We will consider all comments received by the
closing date and may amend this supplemental NPRM in light of those
comments.
We will post all comments submitted, without change, to http://
dms.dot.gov, including any personal information you provide. We will
also post a report summarizing each substantive verbal contact with FAA
personnel concerning this supplemental NPRM. Using the search function
of that web site, anyone can find and read the comments in any of our
dockets, including the name of the individual who sent the comment (or
signed the comment on behalf of an association, business, labor union,
etc.). You may review the DOT's complete Privacy Act Statement in the
Federal Register published on April 11, 2000 (65 FR 19477-78), or you
may visit http://dms.dot.gov.
Examining the Docket
You may examine the AD docket on the Internet at http://
dms.dot.gov, or in person at the Docket Operations office between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays. The
Docket Operations office (telephone (800) 647-5527) is located on the
ground level of the West Building at the DOT street address stated in
the ADDRESSES section. Comments will be available in the AD docket
shortly after the Docket Management System receives them.
Discussion
We proposed to amend 14 CFR part 39 with a notice of proposed
rulemaking (NPRM) for an AD (the ``original NPRM'') for all Boeing
Model 757 airplanes. The original NPRM was published in the Federal
Register on January 3, 2007 (72 FR 50). The original NPRM proposed to
require revising the Airworthiness Limitations (AWLs) section of the
Instructions for Continued Airworthiness by incorporating new
limitations for fuel tank systems to satisfy Special Federal Aviation
Regulation No. 88 (SFAR 88) requirements. The original NPRM also
proposed to require the initial inspection of certain repetitive
inspections specified in the AWLs to phase-in those inspections, and
repair if necessary.
Explanation of Change in Compliance Time
In most ADs, we adopt a compliance time allowing a specified amount
of time after the AD's effective date. In this case, however, we have
already issued regulations that require operators to revise their
maintenance/inspection programs to address fuel tank safety issues. The
compliance date for these regulations is December 16, 2008. To provide
for efficient and coordinated implementation of these regulations and
this supplemental NPRM, we are using this same compliance date in this
supplemental NPRM, instead of the 18-month compliance time recommended
by Boeing. Therefore, we have revised the compliance time in paragraph
(g) from ``within 18 months after the effective date of this AD'' to a
compliance date of ``no later than December 16, 2008.''
Comments
We have considered the following comments on the original NPRM.
[[Page 41964]]
Request To Revise Note 1
Boeing requests that the Note 1 of the original NPRM be revised
from ``* * * the operator must request approval for revision * * *'' to
``* * * the operator must request approval for deviation from * * * .''
Boeing states that, as written, Note 1 would result in modifications,
alternations, or repairs being incorporated into the Boeing 757
Maintenance Planning Data (MPD) Document D622N001-9, Revision March
2006 (referred to in the original NPRM as the appropriate source of
service information) that are outside of its configuration definition
data and responsibility. Boeing also states that the MPD document is
intended to reflect the Boeing 757 type design as defined only by
Boeing data.
We partially agree. We do not agree with Boeing's suggested change.
We find that Boeing is misinterpreting the intent of Note 1, and that
clarification is necessary. The sentence in question states, ``In this
situation, * * * the operator must request approval for revision to the
airworthiness limitations (AWLs) in the Boeing 757 Maintenance Planning
Data (MPD) Document D622N001-9 * * * .'' The term ``revision'' refers
to the ``airworthiness limitations,'' not to the MPD document. The
modification, alteration, or repair would affect only a few airplanes,
so a revision to the MPD document, which would affect the whole fleet,
would not be appropriate. However, we do agree with Boeing that a
revision to the MPD document may not be necessary. We have determined
that operators also can request approval for revision to the AWLs in
the MPD document according to paragraph (i) of this supplemental NPRM.
Therefore, we have revised Note 1 accordingly.
Request To Add Procedures of Boeing 757 MPD Document
Boeing requests that the original NPRM be revised to contain the
procedures specified in Section 9 of Boeing 757 MPD Document D622N001-9
or an approved equivalent AWL/Certification Maintenance Requirement
(CMR) document, rather than referring to the MPD document as the source
for the procedures. Boeing states that it may move Section 9
(airworthiness limitation section) out of the Boeing 757 MPD document,
and thus the AD may need to be revised.
We do not agree. We have confirmed with Boeing that it has no
immediate plans to change the Boeing 757 MPD document. Therefore, until
the Boeing 757 MPD Document D622N001-9 is revised, we consider it
appropriate that this supplemental NPRM refer to it as the appropriate
source of service information for accomplishing the proposed actions.
We might consider issuing additional rulemaking or approving
alternative methods of compliance to address that concern in the
future. We have not changed the supplemental NPRM regarding this issue.
Request To Extend Compliance Time
United Parcel Service (UPS) requests that, for low cycle operators
(less than 800 flight cycles per year), the compliance time for the
initial inspections in paragraph (h) of the original NPRM be extended
from ``10 years or 36,000 flight cycles'' to ``16 years (8C) or 36,000
flight cycles, whichever occurs first.'' UPS states that this will not
penalize low-utilization operators. UPS states that it has tank entries
approximately every 8 years, and that 16 years lines up better with its
maintenance program. UPS also states that a compliance time of 10 years
would significantly increase its financial burden. UPS did not submit
any data with its comment.
We do not agree. In developing the compliance time for the original
NPRM, we considered not only the risk of creating an ignition source in
the tank, but we also considered the practical aspect of accomplishing
the proposed inspections within a period of time that corresponds to
the major structural inspections or fuel tank entries to limit the
impact on operators. With UPS's tank entries occurring approximately
every 8 years, the 36,000 total flight cycles or 120-month proposed
compliance time would allow UPS's entire fleet to be inspected during
scheduled maintenance with an additional 2 years to allow for some
scheduling flexibility. However, paragraph (i) of the supplemental NPRM
provides operators the opportunity to request an extension of the
compliance time if data are presented to justify such an extension.
Request To Include an Additional Airworthiness Limitation
Boeing requests that we revise paragraph (h) of the original NPRM
for completeness to include Airworthiness Limitation 28-AWL-25
(Lightning and Fault Current Protection--Motor Operated Valve
Actuator). Boeing notes this AWL was added to Section 9 of the Boeing
757 MPD Document D622N001-9 in October 2006.
We agree with Boeing's intent; however, we do not agree with
including Airworthiness Limitation 28-AWL-25 in this supplemental NPRM.
We are considering issuing a separate rulemaking action that would
propose to require installation of a new actuator and inspections in
accordance with Airworthiness Limitation 28-AWL-25.
Request To Revise Numbering of Notes
Boeing requests that Notes 2 and 3 of the original NPRM be
renumbered. Boeing believes that there are only two notes as part of
Table 1 of the original NPRM, and that the notes were incorrectly
numbered.
We understand Boeing's concern; however, we do not agree that the
notes need to be renumbered. There are total of three notes in the
supplemental NPRM. All three notes are correctly numbered. In all ADs,
notes are numbered sequentially in the regulatory text.
Request To Revise Appendix 1
Boeing requests that Appendix 1 of the original NPRM be revised to
include missing task titles and numbers. Boeing provided no
justification.
We partially agree. Since we issued the original NPRM, the
modifications of the motor operated valve actuator have been approved,
and the associated airplane maintenance manual (AMM) changes have been
released. Therefore, we agree with Boeing to revise columns ``Task
Title'' and ``Task ,'' as applicable, of Appendix 1 of the
supplemental NPRM to include the latest information specified in the
AMM that is associated with design changes of the fuel tank system
changes. However, we do not agree with Boeing to add task titles for
the component maintenance manuals (CMM), because the AWLs cover the
entire CMM, not just specific tasks.
Explanation of Other Changes to Original NPRM
We have revised paragraph (g) of this supplemental NPRM to clarify
that the exception refers to the ``initial inspections'' specified in
Table 1 of this AD rather than the ``inspections.''
We have revised paragraph (h) of this supplemental NPRM to allow
the use of later revisions of the MPD.
FAA's Determination and Proposed Requirements of the Supplemental NPRM
Some of the changes discussed above expand the scope of the
original NPRM; therefore, we have determined that it is necessary to
reopen the comment period to provide additional opportunity for public
comment on this supplemental NPRM.
[[Page 41965]]
Costs of Compliance
There are about 990 airplanes of the affected design in the
worldwide fleet. The following table provides the estimated costs for
U.S. operators to comply with this proposed AD.
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Number of U.S.-
Action Work hours Average labor Cost per registered Fleet cost
rate per hour airplane airplanes
----------------------------------------------------------------------------------------------------------------
Revision of AWLs section of the 8 $80 $640 639 $408,960
Instructions for Continued
Airworthiness..................
Detailed and special detailed 8 80 640 639 408,960
inspections....................
----------------------------------------------------------------------------------------------------------------
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); and
3. 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.
We prepared a regulatory evaluation of the estimated costs to
comply with this supplemental NPRM and placed it in the AD docket. See
the ADDRESSES section for a location to examine the regulatory
evaluation.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, 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
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
2. The Federal Aviation Administration (FAA) amends Sec. 39.13 by
adding the following new airworthiness directive (AD):
Boeing: Docket No. FAA-2006-26710; Directorate Identifier 2006-NM-
147-AD.
Comments Due Date
(a) The FAA must receive comments on this AD action by August
27, 2007.
Affected ADs
(b) None.
Applicability
(c) This AD applies to all Boeing Model 757-200, -200PF, -200CB,
and -300 series airplanes, certificated in any category.
Note 1: This AD requires revisions to certain operator
maintenance documents to include new inspections and maintenance
actions. Compliance with these limitations is required by 14 CFR
43.16 and 91.403(c). For airplanes that have been previously
modified, altered, or repaired in the areas addressed by these
limitations, the operator may not be able to accomplish the actions
described in the revisions. In this situation, to comply with 14 CFR
43.16 and 91.403(c), the operator must request approval for revision
to the airworthiness limitations (AWLs) in the Boeing 757
Maintenance Planning Data (MPD) Document D622N001-9 according to
paragraph (g) or (i) of this AD.
Unsafe Condition
(d) This AD results from a design review of the fuel tank
systems. We are issuing this AD to prevent the potential for
ignition sources inside fuel tanks caused by latent failures,
alterations, repairs, or maintenance actions, which, in combination
with flammable fuel vapors, could result in a fuel tank explosion
and consequent loss of the airplane.
Compliance
(e) You are responsible for having the actions required by this
AD performed within the compliance times specified, unless the
actions have already been done.
Service Information
(f) The term ``Revision March 2006 of the MPD'' as used in this
AD, means Section 9 of Boeing 757 MPD Document D622N001-9, Revision
March 2006.
Revision of AWLs Section
(g) No later than December 16, 2008, revise the AWLs section of
the Instructions for Continued Airworthiness by incorporating the
information in the sections specified in paragraphs (g)(1) through
(g)(3) of this AD into the MPD, except that the initial inspections
specified in Table 1 of this AD must be done at the compliance times
specified in Table 1. Accomplishing the revision in accordance with
a later revision of the MPD is an acceptable method of compliance if
the revision is approved by the Manager, Seattle Aircraft
Certification Office (ACO), FAA.
(1) Section E., ``AIRWORTHINESS LIMITATIONS--FUEL SYSTEMS,'' of
Revision March 2006 of the MPD.
(2) Section F., ``PAGE FORMAT: SYSTEMS AIRWORTHINESS
LIMITATIONS,'' of Revision March 2006 of the MPD.
(3) Section G., ``AIRWORTHINESS LIMITATIONS--FUEL SYSTEM AWLs''
of Revision March 2006 of the MPD.
Initial Inspections and Repair
(h) Do the inspections specified in Table 1 of this AD and
repair any discrepancy, in accordance with Section G.,
``AIRWORTHINESS LIMITATIONS--FUEL SYSTEM AWLs,'' of Revision March
2006 of the MPD. The repair must be done before further flight.
Accomplishing the actions in accordance with a later revision of the
MPD is an acceptable method of compliance if the revision is
approved by the Manager, Seattle ACO, FAA.
[[Page 41966]]
Table 1.--Initial Inspections
----------------------------------------------------------------------------------------------------------------
Compliance time (whichever occurs later)
Airworthiness limitations Description -------------------------------------------------
Threshold Grace period
----------------------------------------------------------------------------------------------------------------
(1) 28-AWL-01........................ A detailed inspection Before the accumulation Within 72 months after
of external wires over of 36,000 total flight the effective date of
the center fuel tank cycles, or within 120 this AD.
for damaged clamps, months since the date
wire chafing, and wire of issuance of the
bundles in contact original standard
with the surface of airworthiness
the center fuel tank. certificate or the
date of issuance of
the original export
certificate of
airworthiness,
whichever occurs first.
(2) 28-AWL-03........................ A special detailed Before the accumulation Within 24 months after
inspection of the of 36,000 total flight the effective date of
lightning shield to cycles, or within 120 this AD.
ground termination on months since the date
the out-of-tank fuel of issuance of the
quantity indicating original standard
system to verify airworthiness
functional integrity. certificate or the
date of issuance of
the original export
certificate of
airworthiness,
whichever occurs first.
(3) 28-AWL-14........................ A special detailed Before the accumulation Within 60 months after
inspection of the of 36,000 total flight the effective date of
fault current bond of cycles, or within 120 this AD.
the fueling shutoff months since the date
valve actuator of the of issuance of the
center wing tank to original standard
verify electrical bond. airworthiness
certificate or the
date of issuance of
the original export
certificate of
airworthiness,
whichever occurs first.
----------------------------------------------------------------------------------------------------------------
Note 2: For the purposes of this AD, a detailed inspection is:
``An intensive examination of a specific item, installation, or
assembly to detect damage, failure, or irregularity. Available
lighting is normally supplemented with a direct source of good
lighting at an intensity deemed appropriate. Inspection aids such as
mirror, magnifying lenses, etc., may be necessary. Surface cleaning
and elaborate procedures may be required.''
Note 3: For the purposes of this AD, a special detailed
inspection is: ``An intensive examination of a specific item,
installation, or assembly to detect damage, failure, or
irregularity. The examination is likely to make extensive use of
specialized inspection techniques and/or equipment. Intricate
cleaning and substantial access or disassembly procedure may be
required.''
Alternative Methods of Compliance (AMOCs)
(i)(1) The Manager, Seattle ACO has the authority to approve
AMOCs for this AD, if requested in accordance with the procedures
found in 14 CFR 39.19.
(2) To request a different method of compliance or a different
compliance time for this AD, follow the procedures in 14 CFR 39.19.
Before using any approved AMOC on any airplane to which the AMOC
applies, notify your appropriate principal inspector (PI) in the FAA
Flight Standards District Office (FSDO), or lacking a PI, your local
FSDO.
Appendix 1. Fuel Tank System Airworthiness Limitations--Applicable Maintenance Manuals
----------------------------------------------------------------------------------------------------------------
Airworthiness
limitation
instruction (ALI)/ ATA section or
Airworthiness limitation (AWL) critical design component Task title Task
configuration maintenance manual
control limitation (CMM) document
(CDCCL)
----------------------------------------------------------------------------------------------------------------
28-AWL-01....................... ALI............... Airplane External Wires 28-11-00-206-221
Maintenance Over the Center
Manual (AMM) 28- Tank Inspection.
11-00/601.
28-AWL-02....................... CDCCL............. Standard Wiring Wiring Assembly ..................
Practices Manual and Installation
(SWPM) 20-10-11. Configuration.
28-AWL-03....................... ALI............... AMM 20-55-54/601.. Fuel Quantity 20-55-54-286-001
Indicating System
(FQIS)
Connectors--Inspe
ction/ Check.
28-AWL-04....................... CDCCL............. SWPM 20-10-15..... Assembly of Shield ..................
Ground Wires.
28-AWL-05....................... CDCCL............. SWPM 20-10-11..... Wiring Assembly ..................
and Installation
Configuration.
28-AWL-06....................... CDCCL............. CMM 28-41-68 .................. ..................
Revision 4 or
subsequent
revisions.
28-AWL-07....................... CDCCL............. CMM 28-40-56, .................. ..................
Revision 4; CMM
28-40-62,
revision 3; CMM
28-40-59,
revision 5; or
subsequent
revisions.
28-AWL-08....................... CDCCL............. SWPM 20-14-12..... Repair of FQIS ..................
Wire Harness.
.................. AMM 28-41-09/401.. Install the Tank Varies with
Wiring Harness. configuration
28-AWL-09....................... CDCCL............. AMM 29-11-26/401.. Install the Heat 29-11-26-404-012
Exchanger.
28-AWL-10....................... CDCCL............. AMM 28-22-07/401.. Install the Fuel 28-22-07-404-005
Line and Fittings.
28-AWL-11....................... CDCCL............. .................. .................. ..................
[[Page 41967]]
28-AWL-12....................... CDCCL............. CMM 28-22-08, .................. ..................
revision 3; CMM
28-20-02,
revision 9; or
subsequent
revisions.
28-AWL-13....................... CDCCL............. AMM 28-22-03/401.. Install the Fuel 28-22-03-404-007
Boost Pump
Assembly or the
Fuel Override
Pump Assembly.
28-AWL-14....................... ALI............... AMM 28-21-02/401.. Fueling Shutoff 28-21-02-764-047
Valve Resistance
Check.
28-AWL-15....................... CDCCL............. AMM 28-21-02/401.. Install the 28-21-02-404-019
Fueling Shutoff
Valve.
.................. AMM 28-21-12/401.. Install the 28-21-12-404-015
Actuator of the
Fueling Shutoff
Valve.
28-AWL-16....................... CDCCL............. AMM 28-11-01/401.. Install the Main 28-11-01-404-014
Tank Access Door.
.................. AMM 28-11-02/401.. Install the Center 28-11-02-404-019
Tank Access Door.
.................. AMM 28-11-03/401.. Install the Surge 28-11-03-404-008
Tank Access Door.
28-AWL-17....................... CDCCL............. AMM 28-11-03/401.. Install the Surge 28-11-03-404-008
Tank Access Door.
.................. AMM 28-13-04/201.. Install the 28-13-04-402-014
Pressure Relief
Valve.
28-AWL-18....................... CDCCL............. AMM 28-11-03/401.. Install the Surge 28-11-03-404-008
Tank Access Door.
.................. AMM 28-13-05/401.. Install the 28-13-05-404-004
Housing of the
Vent Flame
Arrestor.
28-AWL-19....................... CDCCL............. Fault Isolation Engine Fuel Feed ..................
Manual (FIM) 28- System--Fault
22-00/101. Isolation.
28-AWL-20....................... ALI............... AMM 28-22-00/501.. Center Tank Fuel 28-22-00-725-507
Override Pump
Auto Shutoff
Functional Test.
.................. .................. System Test-- Varies with
Engine Fuel Feed Configuration
System.
28-AWL-21....................... ALI............... AMM 28-22-00/501.. System Test-- Varies with
Engine Fuel Feed Configuration
System.
28-AWL-22....................... CDCCL............. AMM 28-41-24/401.. Densitometer Hot 28-41-24-404-006
Short Protector
Installation.
28-AWL-23....................... CDCCL............. AMM 28-22-01/401.. Install the 28-22-01-404-19
Adapter Shaft of
the Engine Fuel
Shutoff Valve
(Spar Valve).
.................. AMM 28-22-02/401.. Install the Engine 28-22-02-404-041
Fuel Crossfeed
Adapter Shaft.
.................. AMM 28-22-11/401.. Install the 28-22-11-404-007
Actuator of the
Engine Fuel
Shutoff Valve
(Spar Valve).
.................. AMM 28-22-12/401.. Install the 28-22-12-404-024
Actuator of the
Engine Fuel
Crossfeed Valve.
.................. AMM 28-26-01/401.. Install the 28-26-01-404-035
Adapter Shaft for
the Defuel Valve.
.................. AMM 28-26-02/401.. Install the 28-26-02-404-015
Defueling Valve
Actuator.
28-AWL-24....................... CDCCL............. CMM 28-20-21...... .................. ..................
28-AWL-25....................... ALI............... AMM 28-22-01/401.. Install the 28-22-01-404-19
Adapter Shaft of
the Engine Fuel
Shutoff Valve
(Spar Valve).
.................. AMM 28-022-02/401. Install the Engine 28-22-02-404-041
Fuel Crossfeed
Adapter Shaft.
.................. AMM 28-22-11/401.. Install the 28-22-11-404-007
Actuator of the
Engine Fuel
Shutoff Valve
(Spar Valve).
.................. AMM 28-22-12/401.. Install the 28-22-12-404-024
Actuator of the
Engine Fuel
Crossfeed Valve.
.................. AMM 28-26-01/401.. Install the 28-26-01-404-035
Adapter Shaft for
the Defuel Valve.
.................. AMM 28-26-02/401.. Install the 28-26-02-404-015
Defueling Valve
Actuator.
.................. AMM 28-25-11/401.. Install the 28-25-11-404-010
Actuator of the
APU Fuel Shutoff
Valve.
28-AWL-26....................... ALI............... AMM 28-22-00/501.. System Test-- Varies with
Engine Fuel Feed Configuration
System.
----------------------------------------------------------------------------------------------------------------
[[Page 41968]]
Issued in Renton, Washington, on July 25, 2007.
Stephen P. Boyd,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. E7-14867 Filed 7-31-07; 8:45 am]
BILLING CODE 4910-13-P