
[Federal Register Volume 88, Number 208 (Monday, October 30, 2023)]
[Rules and Regulations]
[Pages 74024-74025]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-23929]


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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 comment; correction.

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SUMMARY: The FAA is correcting an airworthiness directive (AD) that was 
published in the Federal Register. That AD applies to certain 
International Aero Engines, LLC (IAE LLC) Model PW1124G1-JM, PW1127G-
JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-JM, and PW1133GA-JM 
engines. As published, a part number was inadvertently excluded in the 
regulatory text of the AD. This document corrects that error. In all 
other respects, the original document remains the same.

DATES: This correction is effective November 1, 2023. The effective 
date of AD 2023-20-11 remains November 1, 2023.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of November 1, 
2023 (88 FR 71466, October 17, 2023).
    The date for submitting comments on AD 2023-20-11 remains 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:
     Federal eRulemaking Portal: Go to regulations.gov. Follow 
the instructions for submitting comments.
     Fax: (202) 493-2251.
     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.
     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 regulations.gov 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; request for comment; correction, any 
comments received, and other information. The street address for Docket 
Operations is listed above.
    Material Incorporated by Reference:
     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: 
[email protected]; website: connect.prattwhitney.com.
     You may view this referenced 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 regulations.gov 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: [email protected].

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 following paragraph, and other information as described in 14 CFR 
11.35, the FAA will post all comments received, without change, to 
regulations.gov, 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

    AD 2023-20-11, Amendment 39-22570 (88 FR 71466, October 17, 2023), 
requires replacement of the high-pressure compressor (HPC) rear hub 
with a part eligible for installation for certain IAE LLC Model 
PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-JM, PW1133G-
JM, and PW1133GA-JM engines.

Need for Correction

    As published, paragraph (c) in the regulatory text of AD 2023-20-11 
is incorrect. Paragraph (c) of AD 2023-20-11 refers to part number 
``30G4008.'' The correct reference is part number ``30G4008 or 
30G8208.''

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.

Correction of Publication

    This document corrects an error and correctly adds the AD as an 
amendment to 14 CFR 39.13. Although no other part of the preamble or 
regulatory information has been corrected, the FAA is publishing the 
entire rule in the Federal Register.
    The effective date of this AD remains November 1, 2023.

[[Page 74025]]

    Since this action only corrects the mention of an affected part 
number, it has no adverse economic impact and imposes no additional 
burden on any person. Therefore, the FAA has determined that notice and 
public comment procedures are unnecessary.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the FAA amends part 39 of the Federal Aviation 
Regulations (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  [Corrected]

0
2. The FAA amends Sec.  39.13 by adding the following 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 or 30G8208, 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: [email protected].
    (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: [email protected].

(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 this 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: 
[email protected]; website: connect.prattwhitney.com.
    (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 material at the National Archives and 
Records Administration (NARA). For information on the availability 
of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations or email: [email protected].

    Issued on October 25, 2023.
Caitlin Locke,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2023-23929 Filed 10-26-23; 11:15 am]
BILLING CODE 4910-13-P


