[Federal Register Volume 78, Number 102 (Tuesday, May 28, 2013)]
[Proposed Rules]
[Pages 31863-31867]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2013-12523]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2013-0454; Directorate Identifier 2009-SW-081-AD]
RIN 2120-AA64
Airworthiness Directives; Sikorsky Aircraft Corporation-
Manufactured (Sikorsky) Model Helicopters (type certificate currently
held by Erickson Air-Crane Incorporated)
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) for Sikorsky Aircraft Corporation-manufactured Model S-64E
helicopters (type certificate currently held by Erickson Air-Crane
Incorporated (Erickson)). That AD currently requires inspecting and
reworking the main gearbox (MGB) assembly second stage lower planetary
plate (plate). This action would establish or reduce the life limits
for certain flight-critical components, remove from service various
parts, require repetitive inspections and other corrective actions, and
require replacing any cracked part discovered during an inspection.
This proposal is prompted by further analysis performed by the current
type certificate holder and the service history of certain parts. The
actions specified in the proposed AD are intended to prevent a crack in
a flight critical component, failure of a critical part, and subsequent
loss of control of the helicopter.
DATES: We must receive comments on this proposed AD by July 29, 2013.
ADDRESSES: You may send comments by any of the following methods:
Federal eRulemaking Docket: Go to http://www.regulations.gov. Follow the online instructions for sending your
comments electronically.
Fax: 202-493-2251.
Mail: Send comments to the U.S. Department of
Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590-0001.
Hand Delivery: Deliver to the ``Mail'' address between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
Examining the AD Docket
You may examine the AD docket on the Internet at http://www.regulations.gov or in person at the Docket Operations Office
between 9 a.m. and 5 p.m., Monday through Friday, except Federal
holidays. The AD docket contains this proposed AD, the economic
evaluation, any comments received and other information. The street
address for the Docket Operations Office (telephone 800-647-5527) is in
the ADDRESSES section. Comments will be available in the AD docket
shortly after receipt.
For service information identified in this proposed AD, contact
Erickson Air-Crane Incorporated, ATTN: Chris Erickson/Compliance
Officer, 3100 Willow Springs Rd, PO Box 3247, Central Point, OR 97502,
telephone
[[Page 31864]]
(541) 664-5544, fax (541) 664-2312, email address
[email protected]. You may review a copy of the service
information at the FAA, Office of the Regional Counsel, Southwest
Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137.
FOR FURTHER INFORMATION CONTACT: Michael Kohner, Aerospace Engineer,
Rotorcraft Certification Office, Rotorcraft Directorate, FAA, 2601
Meacham Blvd., Fort Worth, TX 76137; telephone (817) 222-5170; email [email protected].
SUPPLEMENTARY INFORMATION:
Comments Invited
We invite you to participate in this rulemaking by submitting
written comments, data, or views. We also invite comments relating to
the economic, environmental, energy, or federalism impacts that might
result from adopting the proposals in this document. The most helpful
comments reference a specific portion of the proposal, explain the
reason for any recommended change, and include supporting data. To
ensure the docket does not contain duplicate comments, commenters
should send only one copy of written comments, or if comments are filed
electronically, commenters should submit only one time.
We will file in the docket all comments that we receive, as well as
a report summarizing each substantive public contact with FAA personnel
concerning this proposed rulemaking. Before acting on this proposal, we
will consider all comments we receive on or before the closing date for
comments. We will consider comments filed after the comment period has
closed if it is possible to do so without incurring expense or delay.
We may change this proposal in light of the comments we receive.
Discussion
On September 5, 1997, we issued AD 97-19-10, Amendment 39-10130 (62
FR 47933, September 12, 1997), to require, at 1,300 hours time-in-
service (TIS), a fluorescent-magnetic particle inspection of the plate,
part number (P/N) 6435-20229-102, for a crack, replacing the plate if a
crack is found, and reworking the plate if there is no crack. That
action also requires, at 1,500 hours TIS, and thereafter at intervals
not to exceed 70 hours TIS, for a reworked plate, P/N 6435-20229-102,
and for plate, P/N 6435-20229-104, inspecting for a crack and replacing
the main gearbox assembly if a crack is found. Finally, AD 97-19-10
requires retiring these part-numbered plates upon reaching 2,600 hours
TIS. That action was prompted by reports that cracks were discovered in
four plates, three of which had been reworked in accordance with
previously superseded AD 77-20-01, Amendment 39-3045 (42 FR 51565,
September 29, 1977) and Amendment 39-3064 (42 FR 56600, October 27,
1977). The requirements of AD 97-19-10 are intended to detect a crack
in the plate to prevent failure of the plate, failure of the main
gearbox, and subsequent loss of control of the helicopter.
Actions Since Existing AD Was Issued
Since issuing AD 97-19-10, Amendment 39-10130 (62 FR 47933,
September 12, 1997), Erickson has performed a configuration review and
additional analyses of the safe life for various parts and released
Erickson Service Bulletin (SB) No. 64B General-1, Revision 19, dated
September 15, 2010 (SB 64B General-1). SB 64B General-1 specifies the
retirement life for certain parts and assemblies as well as noting
other maintenance actions. This and the previous revisions of SB 64B
General-1 contain reduced or new life limits for certain parts, parts
which should be removed from service, other maintenance actions, and
various other provisions for certain parts. We have also reviewed
Erickson SB No. 64B10-3, Revision D, dated October 15, 2007, which
provides ultrasonic inspection procedures for the Main Rotor (M/R) hub
horizontal hinge pins. Based on our review of this list of parts and
assemblies, and an analysis of the service difficulties, we have
determined that we need to propose to revise the life limit of certain
critical parts, remove certain parts from service, and require
additional inspections and other maintenance actions of certain parts.
Failure to establish or revise a life limit or remove a part from
service when there is repeated service difficulties with the part could
result in failure of that part and subsequent loss of control of the
helicopter.
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 helicopters of the same type
design.
Proposed AD Requirements
The proposed AD would supersede AD 97-19-10 (62 FR 47933, September
12, 1997) to establish or revise the life limit for various parts, to
remove various parts from service, to require various inspections and
other maintenance actions, and to revise the component history card or
equivalent record and the airworthiness limitations section of the
maintenance manual accordingly. Specifically, we propose, before
further flight, to establish or to revise the retirement life for each
of the following parts, and to remove from service those parts that
have reached or exceeded the newly established or reduced life limit:
M/R parts
[cir] Rod and bushing assembly, M/R, P/N 6410-21090-012, -013 or -
014;
[cir] Lower plate, M/R hub, P/N 6410-23009-102;
[cir] Upper plate, M/R hub, P/N 6410-23011-102;
[cir] Swashplate, rotating, M/R, P/N 6410-24002-101;
[cir] Piston rod, P/N 6410-26005-104;
[cir] Cylinder, damper assembly, P/N 6410-26215-101;
[cir] M/R blade, P/N 6415-20201-045 or -047;
[cir] M/R blade, P/N 6415-20201-048, -049, -050, or -051;
[cir] M/R shaft assembly (includes shaft, P/N 6435-20078-104), P/N
6435-20078-014 or -015;
[cir] M/R shaft assembly (includes shaft, P/N 6435-20078-105), P/N
6435-20078-016;
[cir] Hub, M/R, P/N S1510-23001-005;
[cir] Spindle assembly, M/R, P/N S1510-23027-5;
[cir] Horn assembly, M/R, P/N S1510-23350-4, -6, or -8;
[cir] Sleeve, M/R, P/N S1510-23351-2;
[cir] Sleeve lockwasher, M/R, S1510-23458-0;
[cir] Cuff, M/R blade, P/N S1515-20320-0, -001 or -002;
[cir] Piston assembly, M/R tandem servo, P/N S1565-20443-0 or
S1565-20443-301;
[cir] Fork assembly, M/R tandem servo, P/N S1565-20449 or P/N
S1565-20449-301;
Tail Rotor (T/R) parts
[cir] T/R blade, P/N 65160-00001-042, -045, or -048;
[cir] T/R blade, P/N 65161-00001-042;
[cir] Bearing, T/R drive shaft, P/N SB1111-004 or -601;
Main Gearbox parts
[cir] Second stage planetary plate assembly, main gearbox assembly,
P/N 6435-20231-012, -014, -015 or -016;
[cir] Oil cooler and support assembly, P/N 6435-60050-044; and
Other parts
[cir] Truss assembly, stabilizer, P/N 6420-66250-041.
In addition to establishing and revising the life limit for certain
parts, we also propose to require, before further flight, removing from
service the
[[Page 31865]]
following flight-critical parts due to previous service difficulties:
Rod and bushing assembly, M/R, P/N 6410-21090-011;
M/R blade, P/N 6415-20001-013, -014, or -015;
Pylon stabilizer, P/N 6420-66201-010, -014, or -015;
M/R shaft assembly, P/N 6435-20078-013;
Oil cooler and support assembly, P/N 6435-60050-043;
Pitch change link, rotary rudder, P/N 65113-07100-046; and
Spindle, M/R blade, P/N S1510-23070-3.
Any part that is required to be removed from service is not eligible
for installation on any helicopter.
This proposed AD also would also require the following inspections
and other corrective actions:
Within 20 hours TIS, and thereafter at intervals not to
exceed 20 hours TIS, inspecting each M/R servo and control arm
assembly, P/N S1565-20421-10, -11, -041, or -043, for any oil leaking
from the M/R tandem servo housing assembly (servo housing), P/N S1565-
20252-2. If there is any oil leaking from the servo housing, before
further flight, replacing the M/R servo and control arm assembly.
Within 20 hours TIS or before reaching a total of 1,120
hours TIS, whichever occurs later, and thereafter at intervals not to
exceed 200 hours TIS or 12 months, whichever occurs first, performing
an ultrasonic inspection (UT) of each M/R hub horizontal hinge pin, P/N
S1510-23099-1 or P/N S1510-23099-001, for a crack.
Performing a fluorescent-magnetic particle inspection
(MPI) for a crack:
[cir] In each second stage planetary plate assembly, P/N 6435-
20231-016, within 150 hours TIS, or before reaching 1,450 hours TIS,
whichever occurs later;
[cir] In each M/R shaft, P/N 6435-20078-104, within 150 hours TIS
or before reaching 1,450 hours TIS, whichever occurs later, and
thereafter at intervals not to exceed 650 hours TIS;
[cir] In each M/R shaft, P/N 6435-20078-105, within 150 hours TIS
or before reaching 1,450 hours TIS, whichever occurs later, and
thereafter at intervals not to exceed 1,450 hours TIS; and
[cir] In each M/R shaft assembly, P/N 6435-20078-014, -015, or -
016, at each overhaul of the main gearbox assembly, P/N 6435-20400-053,
-054, -058, -060, -062, -063, -064, -065, or -066.
Within 150 hours TIS or before reaching 3,375 hours TIS,
whichever occurs later, and thereafter at intervals not to exceed 3,375
hours TIS, performing a fluorescent-penetrant inspection (FPI) of each
housing lug on each M/R tandem servo housing assembly, P/N S1565-20252-
2.
If a there is a crack, before further flight, replacing
the cracked part.
At each overhaul of the damper assembly, P/N 6410-26200-
042, replacing certain parts with parts that have zero (0) hours TIS.
Differences Between the Proposed AD and the Service Information
This proposed AD contains only those parts for the Model S-64E
helicopters whose life limit has either been reduced or added for an
existing P/N, whereas SB 64B General-1 also contains parts whose life
limits have been extended. As a result, this proposed AD does not
include all of the parts or P/Ns that are listed in SB 64B General-1.
Costs of Compliance
We estimate that this proposed AD would affect 13 helicopters of
U.S. registry, and the proposed actions would take the following number
of estimated work hours to accomplish:
26 work hours (2 work hours per helicopter) for the fleet
to review the helicopter records or to remove a part to determine if an
affected part is installed;
845 work hours (65 work hours per helicopter) for the
fleet to replace the parts or assemblies on or before reaching the
retirement lives stated in Table 1 of the proposed AD, assuming an
annual usage of 600 hours TIS;
287 work hours per helicopter to replace all the parts or
assemblies listed in Table 2 of the proposed AD;
130 work hours (10 work hours per helicopter) for the
fleet to inspect the M/R servo housing assemblies for an oil leak,
assuming each inspection would take approximately 0.25 work hour per
helicopter and would be accomplished 40 times annually;
Approximately 293 work hours (22.5 work hours per
helicopter) for the fleet to UT inspect each M/R hub horizontal hinge
pin, assuming that each inspection would take 7.5 work hours per
helicopter and would be accomplished 3 times annually;
288 work hours (48 work hours per helicopter) to perform
an MPI of each main gearbox second stage lower planetary plate and
second stage planetary plate assembly assuming 6 helicopters would be
inspected annually;
192 work hours (32 work hours per helicopter) to perform
an MPI of each M/R shaft and M/R shaft assembly, assuming 6 helicopters
would be inspected annually, and
96 work hours (32 work hours per helicopter) to perform an
FPI of each M/R tandem servo housing assembly, assuming 3 helicopters
would be inspected annually.
Therefore, we estimate that it would take approximately 2,157 work
hours to accomplish the proposed actions at a cost of $183,345, using
an average labor rate $85 per work hour. Replacement parts would cost
approximately:
$5,363,449 ($412,573 per helicopter) to replace the parts
or assemblies on the entire fleet on or before reaching the proposed
retirement lives, assuming parts for 13 helicopters would require
replacement; and
$2,594,400 per helicopter to replace the parts or
assemblies that are listed in Table 2 of the proposed AD.
Using these assumptions, the estimated total cost for the required
parts would be approximately $7,957,849. Based on these estimated
amounts using these assumptions, we estimate the total cost impact of
the proposed AD on the U.S. operators would be $8,141,194.
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 helicopters identified in this
rulemaking action.
Regulatory Findings
We 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, I certify this proposed regulation:
1. Is not a ``significant regulatory action'' under Executive Order
12866;
[[Page 31866]]
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 to the extent that
it justifies making a regulatory distinction; 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.
We prepared an economic evaluation of the estimated costs to comply
with this proposed AD and placed it in the AD docket.
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.
Sec. 39.13 [Amended]
0
2. The FAA amends Sec. 39.13 by removing Amendment 39-10130 (62 FR
47933, September 12, 1997), and adding the following new AD:
Sikorsky Aircraft Corporation-Manufactured (Sikorsky) Model
Helicopters (Type Certificate Currently Held By Erickson Air-Crane
Incorporated): Docket No. FAA-2013-0454; Directorate Identifier
2009-SW-81-AD.
(a) Applicability
This AD applies to Sikorsky Model CH-54A helicopters, now under
the Erickson Air-Crane Incorporated (Erickson) Model S-64E type
certificate, certificated in any category.
(b) Unsafe Condition
This AD defines the unsafe condition as fatigue cracking in a
flight critical component, failure of the component, and subsequent
loss of control of the helicopter.
(c) Affected ADs
This AD supersedes AD 97-19-10, Amendment 39-10130 (62 FR 47933,
September 12, 1997).
(d) Compliance
You are responsible for performing each action required by this
AD within the specified compliance time unless it has already been
accomplished prior to that time.
(e) Required Actions
(1) Before further flight, for each part listed in Table 1 to
paragraph (e) of this AD:
(i) Remove any part that has reached or exceeded its newly
established or revised retirement life.
(ii) Record the newly established or revised retirement life for
each part on the component history card or equivalent record.
(iii) Make pen and ink changes or insert a copy of this AD into
the Airworthiness Limitations section of the maintenance manual to
establish or revise the retirement life for each part that is listed
in Table 1 of this AD.
Table 1 to Paragraph (e) of This AD--Parts With New or Revised Life Limits
--------------------------------------------------------------------------------------------------------------------------------------------------------
Part name Part number (P/N) Retirement life
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Rod and bushing assembly, main 6410-21090-012........................................... 5,700 hours time-in-service (TIS) or 60 months since the
rotor (M/R). initial installation on any helicopter, whichever
occurs first.
Rod and bushing assembly, M/R...... 6410-21090-013 or -014................................... 5,700 hours TIS.
Lower plate, M/R hub............... 6410-23009-102........................................... 3,000 hours TIS.
Upper plate, M/R hub............... 6410-23011-102........................................... 3,000 hours TIS.
Swashplate, rotating, M/R.......... 6410-24002-101........................................... 12,860 hours TIS.
Piston rod......................... 6410-26005-104........................................... 10,500 hours TIS.
Cylinder, damper assembly.......... 6410-26215-101........................................... 7,300 hours TIS.
M/R blade.......................... 6415-20201-045 or -047................................... 3,300 hours TIS.
M/R blade.......................... 6415-20201-048, -049, -050, or -051...................... 20,000 hours TIS.
Truss assembly, stabilizer......... 6420-66250-041........................................... 4,720 hours TIS.
M/R shaft assembly (includes shaft, 6435-20078-014 or -015................................... 2,600 hours TIS.
P/N 6435-20078-104).
M/R shaft assembly (includes shaft, 6435-20078-016........................................... 5,000 hours TIS.
P/N 6435-20078-105).
Second stage planetary plate 6435-20231-012, -014, or -015............................ 1,300 hours TIS.
assembly, main gearbox assembly.
Second stage planetary plate 6435-20231-016........................................... 2,600 hours TIS.
assembly, main gearbox assembly.
Oil cooler and support assembly.... 6435-60050-044........................................... 9,885 hours TIS.
Tail rotor (T/R) blade............. 65160-00001-042, -045, or -048........................... 23,300 hours TIS.
T/R blade.......................... 65161-00001-042.......................................... 23,300 hours TIS.
Hub, M/R........................... S1510-23001-005.......................................... 3,000 hours TIS.
Spindle assembly, M/R.............. S1510-23027-5............................................ 5,675 hours TIS.
Horn assembly, M/R................. S1510-23350-4, -6, or -8................................. 9,710 hours TIS.
Sleeve, M/R........................ S1510-23351-2............................................ 12,930 hours TIS.
Sleeve lockwasher, M/R............. S1510-23458-0............................................ 2,700 hours TIS.
Cuff, M/R blade.................... S1515-20320-0............................................ 6,410 hours TIS.
Cuff, M/R blade.................... S1515-20320-001 or -002.................................. 12,930 hours TIS.
Piston assembly, M/R tandem servo.. S1565-20443-0 or S1565-20443-301......................... 8,100 hours TIS.
Fork assembly, M/R tandem servo.... S1565-20449 or S1565-20449-301........................... 8,100 hours TIS.
Bearing, T/R drive shaft........... SB1111-004 or -601....................................... 1,000 hours TIS or 12 months while installed on any
helicopter, whichever occurs first.
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Note to Table 1 to paragraph (e) of this AD: The list of parts
in Table 1 to paragraph (e) of this AD contains only a portion of
the life-limited parts for this model helicopter and is not an all-
inclusive list.
(2) Before further flight, remove from service any part with a
P/N listed in Table 2 to Paragraph (e) of this AD, regardless of
[[Page 31867]]
the part's TIS. The part numbers listed in Table 2 to paragraph
(e)(2) of this AD are not eligible for installation on any
helicopter.
Table 2 to Paragraph (e) of This AD--Parts To Be Removed From Service
------------------------------------------------------------------------
Part name P/N
------------------------------------------------------------------------
Rod and bushing assembly, M/R.......... 6410-21090-011
M/R blade.............................. 6415-20001-013, -014, or -015
Pylon stabilizer....................... 6420-66201-010, -014, or -015
M/R shaft assembly..................... 6435-20078-013
Oil cooler and support assembly........ 6435-60050-043
Pitch change link, rotary rudder....... 65113-07100-046
Spindle, M/R blade..................... S1510-23070-3
------------------------------------------------------------------------
(3) Within 20 hours TIS, and thereafter at intervals not to
exceed 20 hours TIS, visually inspect each M/R servo and control arm
assembly, P/N S1565-20421-10, -11, -041, or -043, and determine if
there is any oil leaking from the M/R tandem servo housing assembly
(servo housing), P/N S1565-20252-2. If there is any oil leaking from
the servo housing, before further flight, replace the M/R servo and
control arm assembly.
(4) Within 20 hours TIS or before reaching 1,120 hours TIS,
whichever occurs later, and thereafter at intervals not to exceed
200 hours TIS or 12 months, whichever occurs first, ultrasonic (UT)
inspect each M/R hub horizontal hinge pin (hinge pin), P/N S1510-
23099-1 or P/N S1510-23099-001, for a crack in accordance with the
Accomplishment Instructions, paragraphs 2.A through 2.C, of Erickson
Service Bulletin (SB) No. 64B10-3, Revision D, dated October 15,
2007, except you are not required to contact Erickson nor send hinge
pins to them. A non-destructive testing (NDT) UT Level I Special,
Level II, or Level III inspector who is qualified under the
guidelines established by ASNT SNT-TC-1A, ISO 9712, or an FAA-
accepted equivalent qualification standard for NDT inspection and
evaluation, must perform the UT inspection.
(5) Within 150 hours TIS or before reaching 1,450 hours TIS,
whichever occurs later, perform a fluorescent-magnetic particle
inspection (MPI) of each second stage planetary plate assembly, P/N
6435-20231-016, for a crack.
(6) Within 150 hours TIS or before reaching 1,450 hours TIS,
whichever occurs later, and thereafter at intervals not to exceed
650 hours TIS, perform an MPI of each M/R shaft, P/N 6435-20078-104,
for a crack, paying particular attention to the lower spline area.
(7) Within 150 hours TIS or before reaching 1,450 hours TIS,
whichever occurs later, and thereafter at intervals not to exceed
1,450 hours TIS, perform an MPI of each M/R shaft, P/N 6435-20078-
105, for a crack, paying particular attention to the lower spline
area.
(8) Within 150 hours TIS or before reaching 3,375 hours TIS,
whichever occurs later, and thereafter at intervals not to exceed
3,375 hours TIS, perform a fluorescent penetrant inspection of each
housing lug on each servo housing, P/N S1565-20252-2, for a crack.
(9) At each overhaul of the main gearbox assembly, P/N 6435-
20400-053, -054, -058, -060, -062, -063, -064, -065, or -066,
perform an MPI of the entire shaft of each M/R shaft assembly, P/N
6435-20078-014, -015, or -016, for a crack, paying particular
attention to the rotating swashplate spherical bearing ball travel
area, which is located approximately ten inches above the upper
roller bearing journal shoulder.
(10) If there is a crack in any part, before further flight,
replace the cracked part.
(11) At each overhaul of the damper assembly, P/N 6410-26200-
042, replace the following parts with airworthy parts that have zero
(0) hours TIS:
(i) All Air Force-Navy Aeronautical Standard (AN), Aerospace
Standard (AS), Military Standard (MS), and National Aerospace
Standard (NAS) nuts, bolts, washers, and packings, except packing,
P/N MS28775-011, installed on stud, P/N SHF111-11SN-12A;
(ii) Lock washer, P/N SS5073-2;
(iii) Nut, P/N SS5081-05;
(iv) Felt seal, P/N S1510-26017;
(v) Retaining ring, P/N UR106L; and
(vi) Nut, P/N 6410-26214-101.
(f) Alternative Methods of Compliance (AMOCs)
(1) The Manager, Rotorcraft Certification Office, FAA, may
approve AMOCs for this AD. Send your proposal to: Michael Kohner,
Aerospace Engineer, Rotorcraft Certification Office, Rotorcraft
Directorate, FAA, 2601 Meacham Blvd., Fort Worth, TX 76137;
telephone (817) 222-5170; email [email protected].
(2) For operations conducted under a 14 CFR part 119 operating
certificate or under 14 CFR part 91, subpart K, we suggest that you
notify your principal inspector, or lacking a principal inspector,
the manager of the local flight standards district office or
certificate holding district office before operating any aircraft
complying with this AD through an AMOC.
(g) Additional Information
Erickson Service Bulletin (SB) No. 64B General-1, Revision 19,
dated September 15, 2010, which is not incorporated by reference,
contains additional information about the subject of this AD. For
service information identified in this AD, contact Erickson Air-
Crane Incorporated, ATTN: Chris Erickson/Compliance Officer, 3100
Willow Springs Rd, PO Box 3247, Central Point, OR 97502, telephone
(541) 664-5544, fax (541) 664-2312, email address
[email protected]. You may review a copy of this
information at the FAA, Office of the Regional Counsel, Southwest
Region, 2601 Meacham Blvd., Room 663, Fort Worth, Texas 76137.
(h) Subject
Joint Aircraft Service Component (JASC) Code: 6200: Main Rotor
System; 6300: Main Rotor Drive System; 6410: Tail Rotor Blades;
6500: Tail Rotor Drive System.
Issued in Fort Worth, Texas, on May 17, 2013.
Kim Smith,
Directorate Manager, Rotorcraft Directorate, Aircraft Certification
Service.
[FR Doc. 2013-12523 Filed 5-24-13; 8:45 am]
BILLING CODE 4910-13-P