Rule2023-22849
Airworthiness Directives; International Aero Engines, LLC 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
October 17, 2023
Effective
November 1, 2023
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain International Aero Engines, LLC (IAE LLC) Model PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, and PW1133GA-JM engines. This AD was prompted by a manufacturer investigation which revealed that Maintenance, Repair, and Overhaul (MRO) shops were misinterpreting accepted knife edge coating wear limits on the high-pressure compressor (HPC) rear hub. This AD requires replacement of the HPC rear hub with a part eligible for installation. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 88 Issue 199 (Tuesday, October 17, 2023)</title>
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[Federal Register Volume 88, Number 199 (Tuesday, October 17, 2023)]
[Rules and Regulations]
[Pages 71466-71468]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2023-22849]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2023-1996; Project Identifier AD-2022-01361-E;
Amendment 39-22570; AD 2023-20-11]
RIN 2120-AA64
Airworthiness Directives; International Aero Engines, LLC Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule; request for comments.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain International Aero Engines, LLC (IAE LLC) Model PW1124G1-JM,
PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, and
PW1133GA-JM engines. This AD was prompted by a manufacturer
investigation which revealed that Maintenance, Repair, and Overhaul
(MRO) shops were misinterpreting accepted knife edge coating wear
limits on the high-pressure compressor (HPC) rear hub. This AD requires
replacement of the HPC rear hub with a part eligible for installation.
The FAA is issuing this AD to address the unsafe condition on these
products.
DATES: This AD is effective November 1, 2023.
Director of the Federal Register approved the incorporation by
reference of a certain publications listed in this AD as of November 1,
2023.
The FAA must receive comments on this AD by December 1, 2023.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="http://regulations.gov">regulations.gov</a>. Follow
the instructions for submitting comments.
<bullet> Fax: (202) 493-2251.
<bullet> 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.
<bullet> Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2023-1996; 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 street address for Docket Operations is listed above.
Material Incorporated by Reference:
<bullet> For Pratt & Whitney service information identified in this
final rule, contact International Aero Engines, LLC, 400 Main Street,
East Hartford, CT 06118; phone: (860) 565-0140; email:
<a href="/cdn-cgi/l/email-protection#7b131e170b494f3b0b091a0f0f0c13120f151e0255181416"><span class="__cf_email__" data-cfemail="523a373e226066122220332626253a3b263c372b7c313d3f">[email protected]</span></a>; website: <a href="http://connect.prattwhitney.com">connect.prattwhitney.com</a>.
<bullet> 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="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2023-1996.
FOR FURTHER INFORMATION CONTACT: Mark Taylor, Aviation Safety Engineer,
FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238-
7229; email: <a href="/cdn-cgi/l/email-protection#fd909c8f96d3899c8491928fbd9b9c9cd39a928b"><span class="__cf_email__" data-cfemail="1875796a73366c796174776a587e7979367f776e">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Comments Invited
The FAA invites you to send any written data, views, or arguments
about this final rule. Send your comments to an address listed under
ADDRESSES. Include ``Docket No. FAA-2023-1996 and Project Identifier
AD-2022-01361-E'' at the beginning of your comments. The most helpful
comments reference a specific portion of the final rule, explain the
reason for any recommended change, and include supporting data. The FAA
will consider all comments received by the closing date and may amend
this final rule because of those comments.
Except for Confidential Business Information (CBI) as described in
the
[[Page 71467]]
following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to
<a href="http://regulations.gov">regulations.gov</a>, including any personal information you provide. The
agency will also post a report summarizing each substantive verbal
contact received about this final rule.
Confidential Business Information
CBI is commercial or financial information that is both customarily
and actually treated as private by its owner. Under the Freedom of
Information Act (FOIA) (5 U.S.C. 552), CBI is exempt from public
disclosure. If your comments responsive to this AD contain commercial
or financial information that is customarily treated as private, that
you actually treat as private, and that is relevant or responsive to
this AD, it is important that you clearly designate the submitted
comments as CBI. Please mark each page of your submission containing
CBI as ``PROPIN.'' The FAA will treat such marked submissions as
confidential under the FOIA, and they will not be placed in the public
docket of this AD. Submissions containing CBI should be sent to Mark
Taylor, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des
Moines, WA 98198. Any commentary that the FAA receives which is not
specifically designated as CBI will be placed in the public docket for
this rulemaking.
Background
The FAA was notified by the manufacturer that MRO shops
misinterpreted the serviceable limits of HPC rear hubs on certain IAE
LLC Model PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM,
PW1133G-JM, and PW1133GA-JM engines, and accepted knife edge coating
wear that was beyond the design intent. The manufacturer indicated that
the intended limit on knife edge coating is no more than 25-percent top
coat loss, but shops misinterpreted the limit as no more than 25-
percent bond coat loss. Acceptance of coating loss beyond the
manufacturer's intended limit may cause heat-induced cracking at the
forward and aft knife edge seals and uncontained separation of the HPC
rear hub. This condition, if not addressed, could result in uncontained
debris release, damage to the engine, damage to the airplane, in-flight
shutdown, and loss of the airplane. The FAA is issuing this AD to
address the unsafe condition on these products.
FAA's Determination
The FAA is issuing this AD because the agency has determined the
unsafe condition described previously is likely to exist or develop in
other products of the same type design.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Pratt & Whitney Service Bulletin PW1000G-C-72-00-
0209-00A-930A-D, Issue No: 002, dated June 20, 2023, which provides the
list of affected serial numbers for the HPC rear hub. 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.
AD Requirements
This AD requires replacement of the HPC rear hub with a part
eligible for installation.
Justification for Immediate Adoption and Determination of the Effective
Date
Section 553(b)(3)(B) of the Administrative Procedure Act (APA) (5
U.S.C. 551 et seq.) authorizes agencies to dispense with notice and
comment procedures for rules when the agency, for ``good cause,'' finds
that those procedures are ``impracticable, unnecessary, or contrary to
the public interest.'' Under this section, an agency, upon finding good
cause, may issue a final rule without providing notice and seeking
comment prior to issuance. Further, section 553(d) of the APA
authorizes agencies to make rules effective in less than thirty days,
upon a finding of good cause.
The FAA justifies waiving notice and comment prior to adoption of
this rule because no domestic operators use this product. It is
unlikely that the FAA will receive any adverse comments or useful
information about this AD from any U.S. operator. Accordingly, notice
and opportunity for prior public comment are unnecessary, pursuant to 5
U.S.C. 553(b)(3)(B). In addition, for the foregoing reasons, the FAA
finds that good cause exists pursuant to 5 U.S.C. 553(d) for making
this amendment effective in less than 30 days.
Regulatory Flexibility Act
The requirements of the Regulatory Flexibility Act (RFA) do not
apply when an agency finds good cause pursuant to 5 U.S.C. 553 to adopt
a rule without prior notice and comment. Because FAA has determined
that it has good cause to adopt this rule without prior notice and
comment, RFA analysis is not required.
Costs of Compliance
The FAA estimates that this AD affects 0 engines installed on
airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
Estimated Costs
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Cost per Cost on U.S.
Action Labor cost Parts cost product operators
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Replace HPC rear hub.................. 73 work-hours x $85 per $0 $6,205 $0
hour = $6,205.
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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
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
[[Page 71468]]
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, and
(2) Will not affect intrastate aviation in Alaska.
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 adding the following new airworthiness
directive:
2023-20-11 International Aero Engines, LLC: Amendment 39-22570;
Docket No. FAA-2023-1996; Project Identifier AD-2022-01361-E.
(a) Effective Date
This airworthiness directive (AD) is effective November 1, 2023.
(b) Affected ADs
None.
(c) Applicability
This AD applies to International Aero Engines, LLC Model
PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM,
PW1133G-JM, and PW1133GA-JM engines with an installed high-pressure
compressor (HPC) rear hub, part number 30G4008, with a serial number
(S/N) listed in Table 2 or Table 3 of Pratt & Whitney Service
Bulletin PW1000G-C-72-00-0209-00A-930A-D, Issue No: 002, dated June
20, 2023 (PW1000G-C-72-00-0209-00A-930A-D, Issue No: 002).
(d) Subject
Joint Aircraft System Component (JASC) Code 7230, Turbine Engine
Compressor Section.
(e) Unsafe Condition
This AD was prompted by a manufacturer investigation which
revealed that Maintenance, Repair, and Overhaul shops were
misinterpreting accepted knife edge coating wear limits. The FAA is
issuing this AD to prevent heat-induced cracking at the forward and
aft knife edge seals and uncontained separation of the HPC rear hub.
The unsafe condition, if not addressed, could result in uncontained
debris release, damage to the engine, damage to the airplane, in-
flight shutdown, and loss of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
At the next engine shop visit after the effective date of this
AD, replace the HPC rear hub with a part eligible for installation.
(h) Definitions
(1) For the purpose of this AD, a ``part eligible for
installation'' is:
(i) Any HPC rear hub with an S/N that does not appear in Table 2
or Table 3 of PW1000G-C-72-00-0209-00A-930A-D, Issue No: 002; or
(ii) Any HPC rear hub that has been serviced in accordance with
Pratt & Whitney Service Bulletin PW1000G-C-72-00-0209-00A-930A-D
(any revision).
(2) For the purpose of this AD, an ``engine shop visit'' is the
induction of an engine into the shop for maintenance involving the
separation of major mating engine flange H. The separation of engine
flanges solely for the purpose of transportation without subsequent
engine maintenance does not constitute an engine shop visit.
(i) Credit for Previous Actions
You may take credit for the actions required by paragraph (g) of
this AD if you performed those actions before the effective date of
this AD using Pratt & Whitney Service Bulletin PW1000G-C-72-00-0209-
00A-930A-D, Issue No: 001, dated September 13, 2022.
(j) Alternative Methods of Compliance (AMOCs)
(1) The Manager, AIR-520 Continued Operational Safety 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 AIR-520 Continued
Operational Safety Branch, send it to the attention of the person
identified in paragraph (k) of this AD and email to: <a href="/cdn-cgi/l/email-protection#04454a412945402945494b47446265652a636b72"><span class="__cf_email__" data-cfemail="55141b107814117814181a16153334347b323a23">[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.
(k) Related Information
For more information about this AD, contact Mark Taylor,
Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines,
WA 98198; phone: (781) 238-7229; email: <a href="/cdn-cgi/l/email-protection#e28f839089cc96839b8e8d90a2848383cc858d94"><span class="__cf_email__" data-cfemail="721f1300195c06130b1e1d00321413135c151d04">[email protected]</span></a>.
(l) 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 Service Bulletin PW1000G-C-72-00-0209-00A-
930A-D, Issue No: 002, dated June 20, 2023.
(ii) [Reserved]
(3) For Pratt & Whitney service information identified in this
AD, contact International Aero Engines LLC, 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="a3cbc6cfd39197e3d3d1c2d7d7d4cbcad7cdc6da8dc0ccce">[email protected]</span></a>; website: <a href="http://connect.prattwhitney.com">connect.prattwhitney.com</a>.
(4) 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.
(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#81e7f3afe8eff2f1e4e2f5e8eeefc1efe0f3e0afe6eef7"><span class="__cf_email__" data-cfemail="85e3f7abecebf6f5e0e6f1eceaebc5ebe4f7e4abe2eaf3">[email protected]</span></a>, or go to: <a href="http://www.archives.gov/federal-register/cfr/ibr-locations.html">www.archives.gov/federal-register/cfr/ibr-locations.html</a>.
Issued on October 5, 2023.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2023-22849 Filed 10-16-23; 8:45 am]
BILLING CODE 4910-13-P
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