Rule2022-05296
Airworthiness Directives; Pratt & Whitney Division Turbofan Engines
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
March 11, 2022
Effective
April 15, 2022
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is superseding Airworthiness Directive (AD) 2019-03-01 and AD 2021-05-51 for certain Pratt & Whitney Division (PW) PW4074, PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 model turbofan engines. AD 2019-03-01 required performing initial and repetitive thermal acoustic image (TAI) inspections for cracks in certain 1st- stage low-pressure compressor (LPC) blades and removal of those blades that fail inspection. AD 2021-05-51 required performing a one-time TAI inspection for cracks in certain 1st-stage LPC blades and removal of those blades that fail inspection. This AD was prompted by three in- flight failures of a 1st-stage LPC blade, with one failure resulting in an engine fire during flight, and subsequent manufacturer publication of service information specifying improved inspections for three critical locations on the 1st-stage LPC blade. This AD requires initial and repetitive ultrasonic (UT) inspections and TAI inspections for cracks in certain 1st-stage LPC blades and removal of those blades that fail inspection. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 87 Issue 48 (Friday, March 11, 2022)</title>
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[Federal Register Volume 87, Number 48 (Friday, March 11, 2022)]
[Rules and Regulations]
[Pages 13923-13926]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-05296]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2021-0959; Project Identifier AD-2021-00830-E;
Amendment 39-21975; AD 2022-06-09]
RIN 2120-AA64
Airworthiness Directives; Pratt & Whitney Division Turbofan
Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2019-03-01
and AD 2021-05-51 for certain Pratt & Whitney Division (PW) PW4074,
PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 model turbofan
engines. AD 2019-03-01 required performing initial and repetitive
thermal acoustic image (TAI) inspections for cracks in certain 1st-
stage low-pressure compressor (LPC) blades and removal of those blades
that fail inspection. AD 2021-05-51 required performing a one-time TAI
inspection for cracks in certain 1st-stage LPC blades and removal of
those blades that fail inspection. This AD was prompted by three in-
flight failures of a 1st-stage LPC blade, with one failure resulting in
an engine fire during flight, and subsequent manufacturer publication
of service information specifying improved inspections for three
critical locations on the 1st-stage LPC blade. This AD requires initial
and repetitive ultrasonic (UT) inspections and TAI inspections for
cracks in certain 1st-stage LPC blades and removal of those blades that
fail inspection. The FAA is issuing this AD to address the unsafe
condition on these products.
DATES: This AD is effective April 15, 2022.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of April 15,
2022.
ADDRESSES: For service information identified in this final rule,
contact Pratt & Whitney Division, 400 Main Street, East Hartford, CT
06118; phone: (860) 565-0140; email: <a href="/cdn-cgi/l/email-protection#462e232a367472063634273232312e2f3228233f6825292b"><span class="__cf_email__" data-cfemail="6e060b021e5c5a2e1e1c0f1a1a1906071a000b17400d0103">[email protected]</span></a>; website:
<a href="https://connect.prattwhitney.com">https://connect.prattwhitney.com</a>. You may view this service information
at the FAA, Airworthiness Products Section, Operational Safety Branch,
1200 District Avenue, Burlington, MA 01803. For information on the
availability of this material at the FAA, call (817) 222-5110. It is
also available at <a href="https://www.regulations.gov">https://www.regulations.gov</a> by searching for and
locating Docket No. FAA-2021-0959.
Examining the AD Docket
You may examine the AD docket at <a href="https://www.regulations.gov">https://www.regulations.gov</a>by
searching for and locating Docket No. FAA-2021-0959; or in person at
Docket Operations between 9 a.m. and 5 p.m., Monday through Friday,
except Federal holidays. The AD docket contains this final rule, any
comments received, and other information. The address for Docket
Operations is U.S. Department of Transportation, Docket Operations, M-
30, West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue
SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT: Carol Nguyen, Aviation Safety
Engineer, ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803;
phone: (781) 238-7655; fax: (781) 238-7199; email:
<a href="/cdn-cgi/l/email-protection#452624372a296b2b22303c202b052324246b222a33"><span class="__cf_email__" data-cfemail="92f1f3e0fdfebcfcf5e7ebf7fcd2f4f3f3bcf5fde4">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 to supersede AD 2019-03-01, Amendment 39-19553 (84 FR 4320,
February 15, 2019) (AD 2019-03-01), and AD 2021-05-51, Amendment 39-
21470 (86 FR 13445, March 9, 2021) (AD 2021-05-51). AD 2019-03-01 and
AD 2021-05-51 applied to certain PW PW4074, PW4074D, PW4077, PW4077D,
PW4084D, PW4090, and PW4090-3 model turbofan engines. The NPRM
published in the Federal Register on December 28, 2021 (86 FR 73699).
The NPRM was prompted by the manufacturer developing an improved UT
inspection for the three critical locations on the 1st-stage LPC blade,
two at the mid span region of the blade and one at the flow path region
of the blade, following three in-flight failures of a 1st-stage LPC
blade, with one failure resulting in an engine fire during flight. The
manufacturer published Pratt & Whitney Alert Service Bulletin (ASB)
PW4G-112-A72-361, dated October 15, 2021, which provides instructions
for performing both the improved UT inspection and the TAI inspection.
The manufacturer also determined that it was necessary to adjust the
initial TAI inspection threshold and lower the repetitive TAI
inspection interval on the 1st-stage LPC blades to address the unsafe
condition. In the NPRM, the FAA proposed to require initial and
repetitive UT inspections and TAI inspections for cracks in certain
1st-stage LPC blades and removal of those blades that fail inspection.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from five commenters. The commenters were
Air Line Pilots Association, International (ALPA), All Nippon Airways
(ANA), The Boeing Company (Boeing), Japan Airlines (JAL), and United
Airlines (UAL). The following presents the comments received on the
NPRM and the FAA's response to each comment.
Request To Revise Note and Add Additional Note in Required Actions
UAL requested that the FAA revise Note 2 to paragraph (g)(1)(ii) of
the NPRM [Note 1 to paragraph (g)(1)(ii) of this AD] to ``The FAA-
approved TAI inspection method and the vendors that can perform the
FAA-approved TAI inspection are specified in the Accomplishment
Instructions section and Vendor Services section of PW4G-112-A72-361,
respectively.'' UAL also requested that the FAA add the same note to
paragraph (g)(2)(iii) of this AD.
The FAA agrees and revised Note 1 to paragraph (g)(1)(ii) of this
AD and added Note 2 to paragraph (g)(2)(iii) to this AD, as requested
by UAL.
Request To Change the Initial Compliance Time to Before Revenue Flight
ANA requested that the FAA change the Required Actions, paragraph
(g)(1) Initial 1st-stage LPC Blade Inspections, from ``before further
flight after the effective of this AD'' to ``before the next revenue
flight'' to clarify the ferry flight requirement.
Similarly, JAL requested the FAA change the Required Actions,
paragraph (g)(1) Initial 1st-stage LPC Blade Inspections, from ``before
further flight after the effective of this AD'' to ``before the next
revenue flight'' or ``before further flight except the ferry flight
without passenger and cargos.''
The FAA disagrees with changing the initial compliance in paragraph
(g) of this AD as requested by ANA and JAL. The FAA has determined it
is necessary to require certain actions prior to any flight, except as
permitted in paragraph (i), Special Flight Permit, of this AD.
[[Page 13924]]
Request To Add Aircraft Maintenance Manual Task to Special Flight
Permit
ANA and UAL requested that paragraph (h)(2) of the proposed AD
(paragraph (i)(2) of this AD) include Task 29-11-00-710-806 of the
Boeing 777-200/300 Aircraft Maintenance Manual as an acceptable method
for accomplishing the functional check of the left and right hydraulic
pump shutoff valves.
The FAA agrees and has added Task 29-11-00-710-806 of the Boeing
777-200/300 Aircraft Maintenance Manual to Note 3 to paragraph (i)(2)
of this AD as guidance for accomplishing the actions in paragraph
(i)(2), Special Flight Permit, of this AD.
Request To Add Certain Exceptions for Ferry Flights
JAL requested that the FAA revise the AD to include certain
exceptions for ferry flights. JAL stated it is planning to ferry
affected airplanes to a storage point in the United States. JAL
commented that although the local authority in Japan provides
regulatory requirements for special flight permissions which are
similar to 14 CFR 21.197, Special flight permits, the Japanese
regulatory requirements do not include ``to a point of storage''
language for the purpose of the flights. JAL proposed to add the
following wording to paragraphs (c) and (g), Applicability and Required
Actions, respectively, of this AD, ``except for ferry flights, without
passenger and cargo, of the airplanes on which the actions specified in
paragraphs (h)(1) and (h)(2) of this AD [paragraphs (i)(1) and (2) of
this AD] have been done.''
The FAA disagrees with revising paragraph (c) Applicability or
paragraph (g) Required Actions of this AD in response to JAL's comment.
Paragraph (i), Special Flight Permit, provides that special flight
permits, as described in 14 CFR 21.197 and 21.199, are permitted
provided that the actions in paragraphs (i)(1) and (2) of this AD have
first been accomplished. 14 CFR 21.197(a)(1) provides, in relevant
part, that a special flight permit may be issued for flying the
aircraft to a base where repairs, alterations, or maintenance are to be
performed, or to a point of storage. The requested change is already
permitted by this AD. The FAA did not change this AD as a result of
this comment.
Request To Provide a Threshold for the Special Flight Permit
JAL and UAL requested that the FAA provide a threshold in paragraph
(h)(1) of the proposed AD [paragraph (i)(1) of this AD] for the flow
path UT inspection of the 1st-stage LPC blades for cracking prior to
obtaining a special flight permit. JAL suggested a threshold of 275
flight cycles (FCs) since the last flow path UT inspection for 1st-
stage LPC blades that have zero cycles since new (CSN) and also for
1st-stage LPC blades that have accumulated any number of CSN greater
than zero.
UAL stated that omitting a compliance time in paragraph (h) of the
proposed AD for the special flight permits creates ambiguity regarding
when and how often the flow path UT inspection is required for special
flight permits. UAL suggested a threshold of 275 FCs since the last
flow path UT inspection.
The FAA agrees to add a threshold of 275 FCs to paragraph (i)(1) of
this AD. This allows airplanes with 1st-stage LPC blades that have
accumulated 275 CSN or fewer to be eligible for a special flight
permit.
Request To Define Part Eligible for Installation
JAL requested that the FAA define the 1st-stage LPC blade eligible
for installation.
The FAA agrees and added paragraph (h) to this AD to define a part
eligible for installation.
Request To Clarify the Use of Revised Non-Destructive Inspection
Procedures (NDIPs)
JAL requested clarification for the use of revised NDIPs for the
flow path UT inspection of the 1st-stage LPC blades specified in
paragraph (g)(1), (g)(2), and (h)(1) of the proposed AD (paragraph
(g)(1), (g)(2), and (i)(1) of this AD). JAL commented that Pratt &
Whitney ASB PW4G-112-A72-361, dated October 15, 2021, references the UT
inspection procedures in NDIP 1238, NDIP-1240, and NDIP-1241, which are
currently at the original version. JAL asked if the submission of an
alternative method of compliance (AMOC) request is necessary if the
NDIPs are later revised to meet the requirements in paragraph (g)(1),
(g)(2), and (h)(1) of the proposed AD (paragraph (g)(1), (g)(2), and
(i)(1) of this AD).
Pratt & Whitney Alert Service Bulletin PW4G-112-A72-361, dated
October 15, 2021, requires the latest FAA-approved revision of NDIP-
1238, NDIP-1240, and NDIP-1241 at the time the initial inspection is
accomplished. Furthermore, the FAA has provided credit for
accomplishment of the flow path and mid span UT inspection identified
in paragraph (g)(1), and (i)(1) of this AD using the service
information specified in paragraph (j) of this AD.
Support for the AD
ALPA and Boeing expressed support for the AD as written.
Conclusion
The FAA reviewed the relevant data, considered any comments
received, and determined that air safety requires adopting the AD as
proposed. Accordingly, the FAA is issuing this AD to address the unsafe
condition on these products. Except for minor editorial changes and any
other changes described previously, this AD is adopted as proposed in
the NPRM. None of the changes will increase the economic burden on any
operator.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Pratt & Whitney ASB PW4G-112-A72-361, dated
October 15, 2021. This ASB specifies procedures for performing the TAI
and UT inspections of 1st-stage LPC blades. This service information is
reasonably available because the interested parties have access to it
through their normal course of business or by the means identified in
ADDRESSES.
Other Related Service Information
The FAA reviewed ``Engine-Driven Pump (EDP) Shutoff Valve Check''
(Subtasks 26-21-00-200-018, 26-21-00-200-019, 26-21-00-840-022, and
Task 29-11-00-710-806) of Boeing 777-200/300 Aircraft Maintenance
Manual, dated September 5, 2021. The service information specifies
procedures for performing the engine-driven pump shutoff valve
functional check.
Costs of Compliance
The FAA estimates that this AD affects 108 engines installed on
airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
[[Page 13925]]
Estimated Costs
----------------------------------------------------------------------------------------------------------------
Cost per Cost on U.S.
Action Labor cost Parts cost product operators
----------------------------------------------------------------------------------------------------------------
Perform UT flow path inspection of 1st- 15 work-hours x $85 per $0 $1,275 $137,700
stage LPC blades. hour = $1,275.
Perform UT mid span inspection of 1st- 30 work-hours x $85 per 0 2,550 275,400
stage LPC blades. hour = $2,550.
Perform TAI inspection of 1st-stage 22 work-hours x $85 per 0 1,870 201,960
LPC blades. hour = $1,870.
----------------------------------------------------------------------------------------------------------------
The FAA estimates the following costs to do any necessary
replacement that would be required based on the results of the
inspection. The agency has no way of determining the number of aircraft
that might need this replacement:
On-Condition Costs
----------------------------------------------------------------------------------------------------------------
Cost per
Action Labor cost Parts cost product
----------------------------------------------------------------------------------------------------------------
Replace 1st-stage LPC blade................... 0 work-hours x $85 per hour = $0 $125,000 $125,000
----------------------------------------------------------------------------------------------------------------
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.
The FAA is 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
The FAA has determined that this AD will not have federalism
implications under Executive Order 13132. This AD will 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 this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Will not affect intrastate aviation in Alaska, 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.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.
The Amendment
Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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:
0
a. Removing Airworthiness Directive (AD) 2019-03-01, Amendment 39-19553
(84 FR 4320, February 15, 2019), and AD 2021-05-51, Amendment 39-21470
(86 FR 13445, March 9, 2021); and
0
b. Adding the following new airworthiness directive:
2022-06-09 Pratt & Whitney Division: Amendment 39-21975; Docket No.
FAA-2021-0959; Project Identifier AD-2021-00830-E.
(a) Effective Date
This airworthiness directive (AD) is effective April 15, 2022.
(b) Affected ADs
This AD replaces AD 2019-03-01, Amendment 39-19553 (84 FR 4320,
February 15, 2019), and AD 2021-05-51, Amendment 39-21470 (86 FR
13445, March 9, 2021).
(c) Applicability
This AD applies to Pratt & Whitney Division (PW) PW4074,
PW4074D, PW4077, PW4077D, PW4084D, PW4090, and PW4090-3 model
turbofan engines, with a 1st-stage low-pressure compressor (LPC)
blade, with part number 52A241, 55A801, 55A801-001, 55A901, 55A901-
001, 56A201, 56A201-001, or 56A221, installed.
(d) Subject
Joint Aircraft System Component (JASC) Code 7230, Turbine Engine
Compressor Section.
(e) Unsafe Condition
This AD was prompted by three in-flight failures of a 1st-stage
LPC blade, with one failure resulting in an engine fire during
flight, and subsequent manufacturer publication of service
information specifying improved inspections for three critical
locations on the 1st-stage LPC blade. The FAA is issuing this AD to
prevent failure of the 1st-stage LPC blades. The unsafe condition,
if not addressed, could result in 1st-stage LPC blade release,
damage to the engine, and damage to the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) Initial 1st-Stage LPC Blade Inspections
(i) For 1st-stage LPC blades that have accumulated any number of
cycles since new (CSN) greater than zero, before further flight
after the effective date of this AD, perform a flow path and a mid
span ultrasonic testing (UT) inspection of the 1st-stage LPC blades
in accordance with the Accomplishment Instructions, Part A--Initial
Inspection of All LPC Fan Blades Prior to Their Return to Service,
paragraph 1.A. through C., of Pratt & Whitney Alert Service Bulletin
(ASB) PW4G-112-A72-361, dated October 15, 2021 (PW4G-112-A72-361).
New 1st-stage LPC
[[Page 13926]]
blades that have zero CSN do not need to undergo the initial 1st-
stage LPC blade flow path and mid span UT inspection required by
paragraph (g)(1)(i) of this AD, but must undergo the repetitive
inspections of paragraph (g)(2) of this AD.
(ii) Within the following compliance times after the effective
date of this AD, perform a thermal acoustic image (TAI) inspection
of the 1st-stage LPC blades for cracks using a method approved by
the FAA:
(A) For 1st-stage LPC blades with 1,000 CSN or more, with no
prior TAI inspection, inspect before further flight.
(B) For 1st-stage LPC blades with 1,000 flight cycles (FCs) or
more since the last TAI inspection, inspect before further flight.
(C) For 1st-stage LPC blades with fewer than 1,000 CSN, with no
prior TAI inspection, inspect before accumulating 1,000 CSN.
(D) For 1st-stage LPC blades with fewer than 1,000 FCs since the
last TAI inspection, inspect before accumulating 1,000 FCs since the
last TAI inspection.
Note 1 to paragraph (g)(1)(ii): The FAA-approved TAI inspection
method and the vendors that can perform the FAA-approved TAI
inspection are specified in the Accomplishment Instructions section
and the Vendor Services section of PW4G-112-A72-361, respectively.
(2) Repetitive 1st-Stage LPC Blade Inspections
(i) Before exceeding 275 FCs since the last flow path UT
inspection, and thereafter at intervals not exceeding 275 FCs since
the last flow path UT inspection, perform a flow path UT inspection
of the 1st-stage LPC blades in accordance with the Accomplishment
Instructions, Part B--Repetitive Inspection of All LPC Fan Blades
After Their Return to Service, paragraph 1.A., of PW4G-112-A72-361.
(ii) Before exceeding 550 FCs since the last mid span UT
inspection, and thereafter at intervals not exceeding 550 FCs since
the last mid span UT inspection, perform a mid span UT inspection of
the 1st-stage LPC blades in accordance with the Accomplishment
Instructions, Part B--Repetitive Inspection of All LPC Fan Blades
After Their Return to Service, paragraphs 1.B. and C., of PW4G-112-
A72-361.
(iii) Before exceeding 1,000 FCs since the last TAI inspection,
and thereafter at intervals not exceeding 1,000 FCs since the last
TAI inspection, perform repetitive TAI inspections of the 1st-stage
LPC blades using a method approved by the FAA.
Note 2 to paragraph (g)(2)(iii): The FAA-approved TAI inspection
method and the vendors that can perform the FAA-approved TAI
inspection are specified in the Accomplishment Instructions section
and the Vendor Services section of PW4G-112-A72-361, respectively.
(3) Removal of the 1st-Stage LPC Blade
If any 1st-stage LPC blade fails any inspection required by
paragraphs (g)(1) or (2) of this AD, before further flight, remove
the 1st-stage LPC blade from service and replace with a part
eligible for installation.
(h) Definition
For the purpose of this AD, a ``part eligible for installation''
is a new, zero CSN 1st-stage LPC blade or a 1st-stage LPC blade that
has passed the inspections required by paragraphs (g)(1) and (2) of
this AD, as applicable.
(i) Special Flight Permit
Special flight permits, as described in 14 CFR 21.197 and
21.199, are permitted provided that the actions in paragraphs (i)(1)
and (2) of this AD have first been accomplished.
(1) A flow path UT inspection of the 1st-stage LPC blades for
cracking has been done within the last 275 FCs, as specified in the
Accomplishment Instructions, Part A--Initial Inspection of All LPC
Fan Blades Prior to their Return to Service, paragraph 1.A., of
PW4G-112-A72-361, and the 1st-stage LPC blades have been found
serviceable. This inspection is not required for 1st-stage LPC
blades with 275 CSN or fewer.
(2) A functional check of the left and right hydraulic pump
shutoff valves to ensure they close in response to the corresponding
engine fire handle input and all applicable corrective actions
(i.e., repair) within 10 days prior to flight.
Note 3 to paragraph (i)(2): Guidance for accomplishing the
actions required by paragraph (i)(2) of this AD can be found in the
``Engine-Driven Pump (EDP) Shutoff Valve Check'' (Subtasks 26-21-00-
200-018, 26-21-00-200-019, 26-21-00-840-022, or Task 29-11-00-710-
806) of Boeing 777-200/300 Aircraft Maintenance Manual.
(j) Credit for Previous Actions
This paragraph provides credit for the actions specified in
paragraphs (g)(1) and (i)(1) of this AD, if those actions were
performed before the effective date of this AD using the service
information specified in paragraph (j)(1), (2), or (3) of this AD.
(1) Paragraph 2. of the Accomplishment Instructions of Pratt &
Whitney Special Instruction No. 85F21, dated May 12, 2021, for a
flow path UT inspection.
(2) Paragraph 1.a) through c) of the Accomplishment Instructions
of Pratt & Whitney Special Instruction No. 130F-21, dated July 1,
2021, for a flow path and a mid span UT inspection.
(3) Paragraph 2.a) through c) of the Accomplishment Instructions
of Pratt & Whitney Special Instruction No. 130F-21, Revision A,
dated July 28, 2021, for a flow path and a mid span UT inspection.
(k) Alternative Methods of Compliance (AMOCs)
(1) The Manager, ECO Branch, 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
certification office, send it to the attention of the person
identified in paragraph (l) of this AD. You may email your request
to: <a href="/cdn-cgi/l/email-protection#f0b1beb5ddb1b4ddb1bdbfb3b0969191de979f86"><span class="__cf_email__" data-cfemail="b6f7f8f39bf7f29bf7fbf9f5f6d0d7d798d1d9c0">[email protected]</span></a>.
(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.
(l) Related Information
For more information about this AD, contact Carol Nguyen,
Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue,
Burlington, MA 01803; phone: (781) 238-7655; fax: (781) 238-7199;
email: <a href="/cdn-cgi/l/email-protection#8ae9ebf8e5e6a4e4edfff3efe4caecebeba4ede5fc"><span class="__cf_email__" data-cfemail="6a090b18050644040d1f130f042a0c0b0b440d051c">[email protected]</span></a>.
(m) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the service information listed
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this service information as applicable to do
the actions required by this AD, unless the AD specifies otherwise.
(i) Pratt & Whitney Alert Service Bulletin PW4G-112-A72-361,
dated October 15, 2021.
(ii) [Reserved]
(3) For service information identified in this AD, contact Pratt
& Whitney Division, 400 Main Street, East Hartford, CT 06118; phone:
(860) 565-0140; email: <a href="/cdn-cgi/l/email-protection#731b161f034147330301120707041b1a071d160a5d101c1e"><span class="__cf_email__" data-cfemail="e68e838a96d4d2a69694879292918e8f9288839fc885898b">[email protected]</span></a>; website: <a href="https://connect.prattwhitney.com">https://connect.prattwhitney.com</a>.
(4) You may view this service information FAA, Airworthiness
Products Section, Operational Safety Branch, 1200 District Avenue,
Burlington, MA 01803. For information on the availability of this
material at the FAA, call (817) 222-5110.
(5) You may view this service information that is incorporated
by reference at the National Archives and Records Administration
(NARA). For information on the availability of this material at
NARA, email: <a href="/cdn-cgi/l/email-protection#afc9dd81c6c1dcdfcaccdbc6c0c1efc1ceddce81c8c0d9"><span class="__cf_email__" data-cfemail="9ef8ecb0f7f0edeefbfdeaf7f1f0def0ffecffb0f9f1e8">[email protected]</span></a>, or go to: <a href="https://www.archives.gov/federal-register/cfr/ibr-locations.html">https://www.archives.gov/federal-register/cfr/ibr-locations.html</a>.
Issued on March 4, 2022.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification
Service.
[FR Doc. 2022-05296 Filed 3-9-22; 4:15 pm]
BILLING CODE 4910-13-P
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</html>Indexed from Federal Register on March 11, 2022.
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