Rule2024-09104
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
April 29, 2024
Effective
June 3, 2024
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain International Aero Engines, LLC (IAE) Model PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, and PW1133GA-JM engines. This AD was prompted by a report that certain high-pressure compressor (HPC) 2nd stage rotors and HPC 4th stage rotors have potentially degraded knife-edge seals and abrasive coating of the rear wing 4th stage rotor due to having been cleaned in alkaline solution without masking the knife-edge seal coating. Operating in this condition could result in material degradation and fracture of the HPC 2nd stage rotor and HPC 4th stage rotor. This AD requires replacement of certain HPC 2nd stage rotors and HPC 4th stage rotors. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 89 Issue 83 (Monday, April 29, 2024)</title>
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[Federal Register Volume 89, Number 83 (Monday, April 29, 2024)]
[Rules and Regulations]
[Pages 33204-33206]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-09104]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2023-1989; Project Identifier AD-2023-00512-E;
Amendment 39-22719; AD 2024-06-14]
RIN 2120-AA64
Airworthiness Directives; International Aero Engines, LLC Engines
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain International Aero Engines, LLC (IAE) Model PW1124G1-JM,
PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, and
PW1133GA-JM engines. This AD was prompted by a report that certain
high-pressure compressor (HPC) 2nd stage rotors and HPC 4th stage
rotors have potentially degraded knife-edge seals and abrasive coating
of the rear wing 4th stage rotor due to having been cleaned in alkaline
solution without masking the knife-edge seal coating. Operating in this
condition could result in material degradation and fracture of the HPC
2nd stage rotor and HPC 4th stage rotor. This AD requires replacement
of certain HPC 2nd stage rotors and HPC 4th stage rotors. The FAA is
issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective June 3, 2024.
The Director of the Federal Register approved the incorporation by
reference of a certain publication listed in this AD as of June 3,
2024.
ADDRESSES:
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2023-1989; 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.
Material Incorporated by Reference:
<bullet> For Pratt & Whitney (PW) 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#3058555c4002047040471e4544531e535f5d"><span class="__cf_email__" data-cfemail="c4aca1a8b4f6f084b4b3eab1b0a7eaa7aba9">[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.
FOR FURTHER INFORMATION CONTACT: Carol Nguyen, Aviation Safety
Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone:
(781) 238-7655; email: <a href="/cdn-cgi/l/email-protection#056664776a692b6b62707c606b456364642b626a73"><span class="__cf_email__" data-cfemail="b9dad8cbd6d597d7deccc0dcd7f9dfd8d897ded6cf">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain IAE Model
PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-
JM, and PW1133GA-JM engines. The NPRM published in the Federal Register
on October 5, 2023 (88 FR 69099). The NPRM was prompted by a report of
a batch of HPC 2nd stage rotors and HPC 4th stage rotors that could
have degraded knife-edge seals and abrasive coating on the rear wing
4th stage rotor due to having been cleaned in alkaline solution without
[[Page 33205]]
masking the knife-edge seal coating. Operating in this condition could
result in material degradation and fracture of the HPC 2nd stage rotor
and HPC 4th stage rotor. In the NPRM, the FAA proposed to require
replacement of the affected HPC 2nd stage rotor and HPC 4th stage rotor
with parts eligible for installation. The FAA is issuing this AD to
address the unsafe condition on these products.
Since the NPRM was issued, PW also revised PW Service Bulletin
PW1000G-C-72-00-0208-00A-930A-D, Issue 001, dated September 13, 2022,
to PW Alert Service Bulletin (ASB) PW1000G-C-72-00-0208-00A-930A-D,
Issue 002, dated January 18, 2024, to incorporate editorial changes.
This service bulletin revision does not affect compliance or add any
additional burden upon owners/operators of aircraft with the affected
engines installed. Full credit will be given for PW Service Bulletin
PW1000G-C-72-00-0208-00A-930A-D, Issue 001, dated September 13, 2022.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from two commenters. The commenters were
the Air Line Pilots Association, International (ALPA), and Delta Air
Lines, Inc (DAL). ALPA supported the NPRM without change. The following
presents the comment received from DAL on the NPRM and the FAA's
response.
Request To Revise Definition for Parts Eligible for Installation
DAL requested that the FAA revise paragraph (h)(1)(ii) of the
proposed AD to specify which version of the service bulletin is
acceptable for compliance. DAL noted that the definition of a part
eligible for installation in paragraph (h)(1)(ii) of the proposed AD
does not currently specify which version of the service bulletin is
acceptable for compliance, and it may be unclear to operators if the
use of a future revision of the service bulletin is acceptable.
The FAA agrees with the request to revise paragraph (h)(1)(ii) of
this AD in order to specify which version of the service bulletin is
acceptable for compliance. The FAA revised paragraph (h)(2)(ii) of this
AD to reference PW ASB PW1000G-C-72-00-0208-00A-930A-D, Issue 002,
dated January 18, 2024, which was issued by PW after the NPRM was
published. The FAA also added paragraph (i) to this AD, and
redesignated subsequent paragraphs of this AD accordingly, to provide
credit for actions performed before the effective date of this AD using
PW SB PW1000G-C-72-00-0208-00A-930A-D, Issue 001, dated September 13,
2022.
Conclusion
The FAA reviewed the relevant data, considered any comments
received, and determined that air safety requires adopting this 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 PW1000G-C-72-00-0208-00A-930A-
D, Issue 002, dated January 18, 2024. This service information
identifies the affected HPC 2nd stage rotors and HPC 4th stage rotors
and specifies procedures for inspection and repair of the HPC 2nd stage
rotors and HPC 4th stage rotors. 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.
Costs of Compliance
The FAA estimates that this AD affects 6 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 2nd stage rotor and HPC 73 work-hours x $85 per $0 $6,205 $37,230
4th stage rotor with repaired parts. hour = $6,205.
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Operators may choose to use new parts instead of repaired parts to
comply with this AD. For replacement with new parts, the FAA estimates
the following costs:
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Cost per
Action Labor cost Parts cost product
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Replace HPC 2nd stage rotor................... 32 work-hours x $85 per hour = $312,000 $314,720
$2,720.
Replace HPC 4th stage rotor................... 32 work-hours x $85 per hour = 244,000 246,720
$2,720.
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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
[[Page 33206]]
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 adding the following new airworthiness
directive:
2024-06-14 International Aero Engines, LLC: Amendment 39-22719;
Docket No. FAA-2023-1989; Project Identifier AD-2023-00512-E.
(a) Effective Date
This airworthiness directive (AD) is effective June 3, 2024.
(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 having a high-pressure
compressor (HPC) 2nd stage rotor or HPC 4th stage rotor having a
part number and serial number identified in the Applicability, Table
2, of Pratt & Whitney (PW) Alert Service Bulletin (ASB) PW1000G-C-
72-00-0208-00A-930A-D, Issue 002, dated January 18, 2024 (PW ASB
PW1000G-C-72-00-0208-00A-930A-D, Issue 002).
(d) Subject
Joint Aircraft System Component (JASC) Code 7230, Turbine Engine
Compressor Section.
(e) Unsafe Condition
This AD was prompted by a report that certain HPC 2nd stage
rotors and HPC 4th stage rotors have potentially degraded knife-edge
seals and abrasive coating of the rear wing 4th stage rotor due to
having been cleaned in alkaline solution without masking the knife-
edge seal coating. The FAA is issuing this AD to prevent material
degradation and fracture of the HPC 2nd stage rotor and HPC 4th
stage rotor. The unsafe condition, if not addressed, could result in
uncontained part release or dual-engine shutdown, damage to engine,
damage to airplane, and loss of the airplane.
(f) Compliance
Comply with this AD within the compliance times specified,
unless already done.
(g) Required Actions
(1) At the next engine shop visit after the effective date of
this AD, remove the HPC 2nd stage rotor having a part number and
serial number identified in the Applicability, Table 2, of PW ASB
PW1000G-C-72-00-0208-00A-930A-D, Issue 002, and replace with a part
eligible for installation.
(2) At the next engine shop visit after the effective date of
this AD, remove the HPC 4th stage rotor having a part number and
serial number identified in the Applicability, Table 2, of PW ASB
PW1000G-C-72-00-0208-00A-930A-D, Issue 002, and replace with a part
eligible for installation.
(h) Definitions
(1) For the purposes of this AD, a ``part eligible for
installation'' is:
(i) Any HPC 2nd stage rotor or HPC 4th stage rotor, as
applicable, that does not have a part number and serial number
identified in the Applicability, Table 2, of PW ASB PW1000G-C-72-00-
0208-00A-930A-D, Issue 002; or
(ii) Any HPC 2nd stage rotor or HPC 4th stage rotor, as
applicable, that has incorporated PW ASB PW1000G-C-72-00-0208-00A-
930A-D, Issue 002.
(2) For the purposes of this AD, an ``engine shop visit'' is the
induction of an engine into the shop for maintenance involving the
separation of the ``H'' flange.
(i) Credit for Previous Actions
You may take credit for the replacement of the HPC 2nd stage
rotor or HPC 4th stage rotor required by paragraph (g)(1) or (2) of
this AD if the HPC 2nd stage rotor or HPC 4th stage rotor
incorporated PW Service Bulletin PW1000G-C-72-00-0208-00A-930A-D,
Issue 001, dated September 13, 2022, before the effective date of
this AD.
(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, 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#f1b0bfb4dcb0b5dcb0bcbeb2b1979090df969e87"><span class="__cf_email__" data-cfemail="7b3a353e563a3f563a3634383b1d1a1a551c140d">[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) Additional Information
For more information about this AD, contact Carol Nguyen,
Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines,
WA 98198; phone: (781) 238-7655; email: <a href="/cdn-cgi/l/email-protection#492a283b262567272e3c302c27092f2828672e263f"><span class="__cf_email__" data-cfemail="9bf8fae9f4f7b5f5fceee2fef5dbfdfafab5fcf4ed">[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 Alert Service Bulletin PW1000G-C-72-00-0208-
00A-930A-D, Issue 002, dated January 18, 2024.
(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#4d2528213d7f790d3d3a6338392e632e2220"><span class="__cf_email__" data-cfemail="7b131e170b494f3b0b0c550e0f1855181416">[email protected]</span></a>;
website: <a href="http://connect.prattwhitney.com">connect.prattwhitney.com</a>.
(4) You may view this service information at 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 material at the National Archives and
Records Administration (NARA). For information on the availability
of this material at NARA, visit <a href="/cdn-cgi/l/email-protection#b18dd091d9c3d4d78c" http: www.archives.gov federal-register cfr ibr-locationsoremailfr.inspection@nara.gov">www.archives.gov/federal-register/cfr/<span class="__cf_email__" data-cfemail="7f161d0d5213101c1e0b1610110c100d1a121e1613190d5116110c0f1a1c0b1610113f111e0d1e51181009">[email protected]</span></a>"><a href="http://www.archives.gov/federal-register/cfr/ibr-locationsoremailfr.inspection@nara.gov">www.archives.gov/federal-register/cfr/<span class="__cf_email__" data-cfemail="3d545f4f1051525e5c495452534e524f58505c54515b4f1354534e4d585e495452537d535c4f5c135a524b">[email protected]</span></a></a>.
Issued on March 22, 2024.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2024-09104 Filed 4-26-24; 8:45 am]
BILLING CODE 4910-13-P
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