[Federal Register Volume 87, Number 190 (Monday, October 3, 2022)]
[Rules and Regulations]
[Pages 59660-59664]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-21308]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2022-0292; Project Identifier AD-2021-01297-E; 
Amendment 39-22184; AD 2022-19-15]
RIN 2120-AA64


Airworthiness Directives; International Aero Engines, LLC 
Turbofan 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 LLC) PW1122G-JM, PW1124G1-
JM, PW1124G-JM, PW1127G1-JM, PW1127GA-JM, PW1127G-JM, PW1129G-JM, 
PW1130G-JM, PW1133GA-JM, and PW1133G-JM model turbofan engines. This AD 
was prompted by an analysis of an event involving an International Aero 
Engines AG (IAE AG) V2533-A5 model turbofan engine, which experienced 
an uncontained failure of a high-pressure turbine (HPT) 1st-stage disk 
that resulted in high-energy debris penetrating the engine cowling. 
This AD requires performing an ultrasonic inspection (USI) of the HPT 
1st-stage disk and HPT 2nd-stage disk and, depending on the results of 
the inspections, replacement of the HPT 1st-stage disk or HPT 2nd-stage 
disk. The FAA is issuing this AD to address the unsafe condition on 
these products.

DATES: This AD is effective November 7, 2022.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of November 7, 
2022.

ADDRESSES: 
    AD Docket: You may examine the AD docket at regulations.gov by 
searching for and locating Docket No. FAA-2022-0292; 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:
     For Pratt & Whitney service information identified in this 
final rule, contact International Aero Engines, LLC, 400 Main Street, 
East Hartford, CT 06118; phone: (860) 690-9667; email: 
[email protected]; website: connect.prattwhitney.com.
     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 regulations.gov by searching for and locating Docket 
No. FAA-2022-0292.

FOR FURTHER INFORMATION CONTACT: Mark Taylor, Aviation Safety Engineer, 
ECO Branch, FAA, 1200 District Avenue, Burlington, MA 01803; phone: 
(781) 238-7229; email: [email protected].

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 LLC 
PW1122G-JM, PW1124G1-JM, PW1124G-JM, PW1127G1-JM, PW1127GA-JM, PW1127G-
JM, PW1129G-JM, PW1130G-JM, PW1133GA-JM, and PW1133G-JM model turbofan 
engines. The NPRM published in the Federal Register on March 24, 2022 
(87 FR 16659). The NPRM was prompted by an analysis of an event on 
March 18, 2020, in which an Airbus Model A321-231 airplane, powered by 
IAE AG V2533-A5 model turbofan engines, experienced an uncontained HPT 
1st-stage disk failure that resulted in high-energy debris penetrating 
the engine cowling. Based on a preliminary analysis of this event, on 
March 21, 2020, the FAA issued Emergency AD 2020-07-51 (followed by 
publication in the Federal Register on April 13, 2020, as a Final Rule, 
Request for Comments (85 FR 20402)), which requires the removal from 
service of certain HPT 1st-stage disks installed on IAE AG V2522-A5, 
V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, 
and V2533-A5 model turbofan engines.
    Based on the root cause analysis performed since that March 2020 
event, Pratt & Whitney (PW) identified a different population of HPT 
1st-stage disks and HPT 2nd-stage disks that are subject to the same 
unsafe condition identified in AD 2020-07-51. In response, the FAA 
issued AD 2021-19-10 on September 10, 2021 (86 FR 50610), which 
requires the removal from service of certain HPT 1st-stage disks and 
HPT 2nd-stage disks installed on IAE LLC PW1122G-JM, PW1124G1-JM, 
PW1124G-JM, PW1127G1-JM, PW1127GA-JM, PW1127G-JM, PW1129G-JM, PW1130G-
JM, PW1133GA-JM, and PW1133G-JM model turbofan engines.
    Since the FAA issued AD 2021-19-10, PW identified another 
subpopulation of HPT 1st-stage disks and HPT 2nd-stage disks that 
require inspection and possible removal from service. Included in this 
additional subpopulation of HPT 1st-stage disks and HPT 2nd-stage disks 
are those installed on the model turbofan engines affected by this AD. 
In the NPRM, the FAA proposed to require the performance of a USI of 
the HPT 1st-stage disk and HPT 2nd-stage disk and, depending on the 
results of the inspections, replacement of the HPT 1st-stage disk or 
HPT 2nd-stage disk. The FAA is issuing this AD to address the unsafe 
condition on these products.

Discussion of Final Airworthiness Directive

Comments

    The FAA received comments from four commenters. The commenters were 
Air Line Pilots Association, International (ALPA), All Nippon Airways 
Co., Ltd. (ANA), Delta Air Lines, Inc. (DAL), and Lufthansa Technik AG 
(Lufthansa). The following presents the comments received on the NPRM 
and the FAA's response to each comment.

Revision to the Service Information References

    Since the FAA issued the NPRM, PW notified the FAA that a new 
revision to

[[Page 59661]]

the service information was available. PW published PW Service Bulletin 
(SB) PW1000G-C-72-00-0188-00A-930A-D, Issue No: 002, dated July 8, 
2022, which changes the applicability section of the SB from a range of 
engine serial numbers (ESNs) to a list of HPT 1st-stage disk and HPT 
2nd-stage disk part numbers (P/Ns).
    The FAA has updated this AD to reference PW SB PW1000G-C-72-00-
0188-00A-930A-D, Issue No: 002, dated July 8, 2022. The FAA has also 
added paragraph (i), Credit for Previous Actions, to this AD to allow 
credit for performing the USI before the effective date of this AD 
using PW SB PW1000G-C-72-00-0188-00A-930A-D, Issue No: 001, dated 
September 13, 2021. This change places no additional burden on 
operators.

Request To Include Previously Issued and Future Revisions of Service 
Information Not Incorporated by Reference

    ANA and Lufthansa requested that the FAA add ``or earlier'' to 
paragraph (g)(1) of this AD to allow for the use of previously issued 
revisions of PW SB PW1000G-C-72-00-0112-00A-930A-D, Issue No: 005, 
dated July 22, 2021 (PW SB PW1000G-C-72-00-0112-00A-930A-D). ANA 
reasoned that PW SB PW1000G-C-72-00-0112-00A-930A-D is not incorporated 
by reference, nor does the NPRM reference PW SB PW1000G-C-72-00-0112-
00A-930A-D, Issue No: 002 through 004.
    Lufthansa reasoned that narrowing the required modification to 
Issue No: 005 of PW SB PW1000G-C-72-00-0112-00A-930A-D assumes that 
engines modified using earlier versions of the SB do not satisfy the 
requirements of paragraph (g)(1) of this AD. Further, Lufthansa stated 
that there are engines that have been modified using earlier versions 
of PW SB PW1000G-C-72-00-0112-00A-930A-D. In addition, Lufthansa noted 
that other paragraphs in the required actions do not refer to Issue No: 
005 of PW SB PW1000G-C-72-00-0112-00A-930A-D, which could confuse 
operators when interpreting the requirements of paragraph (g)(1) of 
this AD.
    DAL requested that the FAA revise paragraph (g)(1) of this AD to 
add ``or later'' to PW SB PW1000G-C-72-00-0112-00A-930A-D. DAL reasoned 
that any subsequent revision of PW SB PW1000G-C-72-00-0112-00A-930A-D 
would apply to this AD.
    The FAA agrees that clarification is necessary and has revised 
paragraph (g)(1) of this AD to remove the issue number and date for PW 
SB PW1000G-C-72-00-0112-00A-930A-D.

Request To Revise the Applicability

    DAL requested that the FAA update paragraph (c) of this AD to 
remove reference to ESNs. DAL commented that the NPRM includes only a 
range of ESNs in the applicability, which is derived from PW SB 
PW1000G-C-72-00-0188-00A-930A-D, Issue No: 001, dated September 13, 
2021. DAL reasoned that by limiting the applicability to the range of 
ESNs, this AD would not account for the possibility of installing an 
affected HPT 1st-stage disk or HPT 2nd-stage disk onto any engine 
outside the ESN range that had an earlier than planned shop visit.
    In response to this comment, the FAA has revised paragraph (c) of 
this AD, to remove ``with engine serial numbers P770101 through 
P772647'' and added, ``with an installed: (1) High-pressure turbine 
(HPT) 1st-stage disk, part numbers (P/Ns) 30G4201, 30G6201, or 30G7301; 
and (2) HPT 2nd-stage disk, P/Ns 30G3902, 30G5502, or 30G6602.''

Request To Allow Future Revisions of Required Service Information

    DAL requested that the FAA revise paragraph (g) of this AD to add 
``or later'' to PW SB PW1000G-C-72-00-0188-00A-930A-D, Issue No: 002, 
dated July 8, 2022, to allow for the use of future approved revisions 
of PW SB PW1000G-C-72-00-0188-00A-930A-D, Issue No: 002, dated July 8, 
2022. DAL reasoned that any subsequent revision would still apply to 
this AD. In addition, DAL stated that this change would include 
additional serial-numbered disks added to Table 2 of PW SB PW1000G-C-
72-00-0188-00A-930A-D, Issue No: 002, dated July 8, 2022, in the 
effectivity of this AD.
    The FAA disagrees with the request to revise this AD to allow for 
the use of future approved revisions of PW SB PW1000G-C-72-00-0188-00A-
930A-D, Issue No: 002, dated July 8, 2022. Future revisions of PW SB 
PW1000G-C-72-00-0188-00A-930A-D, Issue No: 002, dated July 8, 2022, 
have not yet been published by the manufacturer or reviewed by the FAA. 
Any operator may request an alternative method of compliance to the 
requirements of paragraph (g) of this AD if future revisions of PW SB 
PW1000G-C-72-00-0188-00A-930A-D, Issue No: 002, dated July 8, 2022, are 
published. Additionally, if future revisions of PW SB PW1000G-C-72-00-
0188-00A-930A-D, Issue No: 002, dated July 8, 2022, are published by 
the manufacturer and approved by the FAA, the FAA may consider further 
rulemaking at that time. The FAA did not change this AD as a result of 
this comment.

Request To Clarify Inspections for Affected HPT 1st-Stage and HPT 2nd-
Stage Disks Removed from Service

    DAL requested that the FAA revise paragraph (g) of this AD to 
clarify that affected HPT 1st-stage disks and HPT 2nd-stage disks 
identified as scrap during the engine shop visit do not require the 
USI. DAL commented that the actions proposed would require the 
performance of a USI on affected disks even if those disks are scrapped 
during an engine shop visit.
    The FAA disagrees that operators are required to perform a USI on 
an HPT 1st-stage disk or HPT 2nd-stage disk that has been removed from 
service. In accordance with 14 CFR 39.7, anyone who operates a product 
that does not meet the requirements of an applicable AD is in violation 
of this section. As such, the actions of this AD are only required if a 
part is returned to service. The FAA did not change this AD as a result 
of this comment.

Request Clarification of Certificate of Conformance from PW's Non-
Destructive Test (NDT) Suppliers

    DAL requested that the FAA revise this AD to allow credit for the 
accomplishment of PW SB PW1000G-C-72-00-0188-00A-930A-D, Issue No: 002, 
dated July 8, 2022, if accomplished by PW or PW-approved NDT suppliers 
(original equipment manufacturer (OEM) or aftermarket). DAL commented 
that PW and PW-approved NDT suppliers provide Certificates of 
Conformance referring to USI Codes 1 and 45S per OEM requirements 
rather than the Non-Destructive Inspection Procedures (NDIPs) (NDIP-
1230, NDIP-1232, NDIP-1231, or NDIP-1233) referenced in the 
Accomplishment Instructions, paragraphs 9.A. through 9.D, of PW SB 
PW1000G-C-72-00-0188-00A-930A-D, Issue No: 002, dated July 8, 2022. DAL 
reasoned that PW or PW-approved NDT suppliers may provide an 
airworthiness tag instead of a Certificate of Conformance. Further, DAL 
noted that the new airworthiness tag and other documentation provided 
with the HPT 1st-stage disk or HPT 2nd-stage disk may not reference PW 
SB PW1000G-C-72-00-0188-00A-930A-D, Issue No: 002, dated July 8, 2022, 
and disks may not have the part markings required by PW SB PW1000G-C-
72-00-0188-00A-930A-D, Issue No: 002, dated July 8, 2022. DAL stated 
that this limited documentation has and is currently being provided for 
the HPT 1st-stage disks and HPT 2nd-stage disks affected by PW SB 
PW1000G-C-72-00-

[[Page 59662]]

0188-00A-930A-D, Issue No: 002, dated July 8, 2022. Some of these 
affected HPT 1st-stage disks and HPT 2nd-stage disks are currently 
installed on engines that are in service or being installed during 
engine shop visits.
    The FAA agrees that clarification is necessary and has added 
paragraph (h)(1)(v) to this AD, which adds the following definition of 
a part eligible for installation: ``Any HPT 1st-stage disk or HPT 2nd-
stage disk with a certificate of conformance that shows ``PW1000G-C-72-
00-0188-00A-930A-D,'' ``1 CODE 45S,'' or identified by part marking 
``21CC332'' or ``SB 72-0188.''

Request To Expand the Use of a Part Eligible for Installation

    DAL requested that the FAA expand the use of a part eligible for 
installation by adding the following required action as paragraph 
(g)(5) of this AD: ``Replacement of HPT 1st-stage and HPT 2nd-stage 
disks: For International Aero Engines, LLC PW1122G-JM, PW1124G1-JM, 
PW1124G-JM, PW1127G1-JM, PW1127GA-JM, PW1127G-JM, PW1129G-JM, PW1130G-
JM, PW1133GA-JM, and PW1133G-JM model turbofan engines, after the 
effective date of this AD, if the HPT 1st-stage and/or the HPT 2nd-
stage disks require replacement, replace with a part eligible for 
installation.'' DAL reasoned that the NPRM requires the current 
definition to be used when the HPT 1st-stage and HPT 2nd-stage disks 
fail the USI required by paragraph (g)(4) of this AD and does not 
ensure future de-modification is avoided. Further, DAL stated that the 
part eligible for installation definition should also address any 
scenario when the HPT 1st-stage and HPT 2nd-stage disks are replaced 
for any other reason.
    In response to this comment, the FAA has added paragraph (i), 
Installation Prohibition, to this final rule.

Request To Revise the Definition of a Part Eligible for Installation

    DAL requested that the FAA revise the definition of a part eligible 
for installation. DAL pointed out that if an affected HPT 1st-stage 
disk or HPT 2nd-stage disk fails the USI, the NPRM, as proposed, would 
not allow installation of an HPT 1st-stage or HPT 2nd-stage disk that 
was upgraded using PW SB PW1000G-C-72-00-0112-00A-930A-D (HPT Block D 
upgrade), which does not require an inspection as specified in 
paragraphs (g)(2) or (3) of this AD. DAL also mentioned that the 
upgraded HPT 1st-stage disk or HPT 2nd-stage disk should still be 
allowed for installation. DAL requested that the FAA add the following 
additional definitions to paragraph (h)(1) of this AD:
    ``(iii) Any HPT 1st-stage disk that has incorporated PW SB PW1000G-
C-72-00-0112-00A-930A-D and does not require an inspection per 
paragraph (g)(2) of this AD.
    (iv) Any HPT 2nd-stage disk that has incorporated PW SB PW1000G-C-
72-00-0112-00A-930A-D and does not require an inspection per paragraph 
(g)(3) of this AD.''
    The FAA agrees with the request and has added paragraphs 
(h)(1)(iii) and (iv) to this AD.

Request To Correct the Definition of a Part Eligible for Installation

    DAL requested that the FAA correct paragraphs (h)(1)(i) and (ii) of 
this AD by changing the language from: ``the USI required by paragraphs 
(g)(1)(i) and (g)(2) of this AD'' to ``the USI required by paragraphs 
(g)(1)(i) or (g)(2) of this AD'' and ``the USI required by paragraphs 
(g)(1)(ii) and (g)(3) of this AD'' to ``the USI required by paragraphs 
(g)(1)(ii) or (g)(3) of this AD.'' DAL reasoned the affected disks 
could not concurrently comply with both scenarios (SB incorporated and 
not incorporated).
    The FAA agrees for the reasons provided and has revised paragraphs 
(h)(1)(i) and (ii) of this AD accordingly.

Support for the AD

    ALPA expressed support for the AD.

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 SB PW1000G-C-72-00-0188-00A-930A-
D, Issue No: 002, dated July 8, 2022. This service information 
specifies procedures for performing a USI of the HPT 1st-stage disk and 
the HPT 2nd-stage disk, identified by P/N and serial number, installed 
on IAE LLC PW1124G1-JM, PW1127G-JM, PW1127GA-JM, PW1129G-JM, PW1130G-
JM, PW1133G-JM, and PW1133GA-JM model turbofan engines. 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 PW SB PW1000G-C-72-00-0112-00A-930A-D, Issue No: 
005, dated July 22, 2021. This service information describes procedures 
for replacing the HPT 1st-stage disk, HPT 2nd-stage disk, and rotating 
hardware. This service information also increases the life limit of the 
HPT hardware by introducing a new configuration of rotating hardware.

Costs of Compliance

    The FAA estimates that this AD affects 189 engines installed on 
airplanes of U.S. registry.
    The FAA estimates the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
               Action                        Labor cost           Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
USI the HPT 1st-stage disk and HPT    204 work-hours x $85                 $0          $17,340       $3,277,260
 2nd-stage disk (also includes         per hour = $17,340.
 estimated costs for disassembly of
 the engine and removal of the HPT
 1st-stage disk and HPT 2nd-stage
 disk).
----------------------------------------------------------------------------------------------------------------

    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:

[[Page 59663]]



                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
                                                                                                     Cost per
                    Action                                Labor cost               Parts cost        product
----------------------------------------------------------------------------------------------------------------
Replace the HPT 1st-stage disk or HPT 2nd-     1 work-hour x $85 per hour =           $171,430         $171,515
 stage disk.                                    $85.
----------------------------------------------------------------------------------------------------------------

    The FAA has included all known costs in its cost estimate. 
According to the manufacturer, however, some of the costs of this AD 
may be covered under warranty, thereby reducing the cost impact on 
affected operators.

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 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:

2022-19-15 International Aero Engines, LLC: Amendment 39-22184; 
Docket No. FAA-2022-0292; Project Identifier AD-2021-01297-E.

(a) Effective Date

    This airworthiness directive (AD) is effective November 7, 2022.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to International Aero Engines, LLC PW1122G-JM, 
PW1124G1-JM, PW1124G-JM, PW1127G1-JM, PW1127GA-JM, PW1127G-JM, 
PW1129G-JM, PW1130G-JM, PW1133GA-JM, and PW1133G-JM model turbofan 
engines with an installed:
    (1) High-pressure turbine (HPT) 1st-stage disk, part numbers (P/
Ns) 30G4201, 30G6201, or 30G7301; and
    (2) HPT 2nd-stage disk, P/Ns 30G3902, 30G5502, or 30G6602.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7250, Turbine 
Section.

(e) Unsafe Condition

    This AD was prompted by an analysis of an event involving an 
International Aero Engines AG V2533-A5 model turbofan engine, which 
experienced an uncontained failure of a HPT 1st-stage disk that 
resulted in high-energy debris penetrating the engine cowling. The 
FAA is issuing this AD to prevent failure of the HPT 1st-stage disk 
and HPT 2nd-stage disk. The unsafe condition, if not addressed, 
could result in uncontained HPT disk failure, release of high-energy 
debris, damage to the engine, damage to the airplane, and loss of 
the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Required Actions

    (1) For affected engines that have not incorporated Pratt & 
Whitney (PW) Service Bulletin (SB) PW1000G-C-72-00-0112-00A-930A-D, 
at the next engine shop visit after the effective date of this AD, 
perform the following:
    (i) Ultrasonic inspection (USI) of the HPT 1st-stage disk using 
the Accomplishment Instructions, paragraph 9.A. or B., as 
applicable, of PW SB PW1000G-C-72-00-0188-00A-930A-D, Issue No: 002, 
dated July 8, 2022 (PW SB PW1000G-C-72-00-0188-00A-930A-D); and
    (ii) USI of the HPT 2nd-stage disk using the Accomplishment 
Instructions, paragraph 9.C. or D., as applicable, of PW SB PW1000G-
C-72-00-0188-00A-930A-D.
    (2) For affected engines that have incorporated PW SB PW1000G-C-
72-00-0112-00A-930A-D, with an installed HPT 1st-stage disk having a 
serial number (S/N) identified in the Accomplishment Instructions, 
Table 2., of PW SB PW1000G-C-72-00-0188-00A-930A-D, at the next 
engine shop visit after the effective date of this AD, perform a USI 
of the HPT 1st-stage disk using the Accomplishment Instructions, 
paragraph 9.A. or B., as applicable, of PW SB PW1000G-C-72-00-0188-
00A-930A-D.
    (3) For affected engines that have incorporated PW SB PW1000G-C-
72-00-0112-00A-930A-D, with an installed HPT 2nd-stage disk having 
an S/N identified in the Accomplishment Instructions, Table 3., of 
PW SB PW1000G-C-72-00-0188-00A-930A-D, at the next engine shop visit 
after the effective date of this AD, perform a USI of the HPT 2nd-
stage disk using the Accomplishment Instructions, paragraph 9.C. or 
D., of PW SB PW1000G-C-72-00-0188-00A-930A-D.
    (4) Based on the results of the USIs required by paragraphs 
(g)(1) through (3) of this AD, if any HPT 1st-stage disk or HPT 2nd-
stage disk does not pass the USI, as specified in the Accomplishment 
Instructions, paragraphs 9.A. through D., of PW SB PW1000G-C-72-00-
0188-00A-930A-D, as applicable, before further flight, remove the 
HPT 1st-stage disk or HPT 2nd-stage disk from service and replace 
with a part eligible for installation.
    (5) For affected engines that have incorporated PW SB PW1000G-C-
72-00-0112-00A-930A-D and do not require an inspection per paragraph 
(g)(2) or (3) of this AD, no further action is required.

(h) Definitions

    (1) For the purpose of this AD, a ``part eligible for 
installation'' is:
    (i) Any HPT 1st-stage disk that has passed the USI required by 
paragraphs (g)(1)(i) or (g)(2) of this AD.

[[Page 59664]]

    (ii) Any HPT 2nd-stage disk that has passed the USI required by 
paragraphs (g)(1)(ii) or (g)(3) of this AD.
    (iii) Any HPT 1st-stage disk that has incorporated PW SB 
PW1000G-C-72-00-0112-00A-930A-D and does not require an inspection 
per paragraph (g)(2) of this AD.
    (iv) Any HPT 2nd-stage disk that has incorporated PW SB PW1000G-
C-72-00-0112-00A-930A-D and does not require an inspection per 
paragraph (g)(3) of this AD.
    (v) Any HPT 1st-stage disk or HPT 2nd-stage disk with a 
certificate of conformance that shows ``PW1000G-C-72-00-0188-00A-
930A-D,'' ``1 CODE 45S,'' or identified by part marking ``21CC332'' 
or ``SB 72-0188.''
    (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 the ``M'' flange. Separation of the ``M'' flange 
solely for the purposes of transportation without subsequent engine 
maintenance does not constitute an engine shop visit.

(i) Credit for Previous Actions

    You may take credit for the USIs required by paragraphs (g)(1) 
through (3) of this AD if you performed the USIs before the 
effective date of this AD using PW SB PW1000G-C-72-00-0188-00A-930A-
D, Issue No: 001, dated September 13, 2021.

(j) Installation Prohibition

    After the effective date of this AD, do not install onto any 
engine an HPT 1st-stage disk or HPT 2nd-stage disk that does not 
meet the definition of a part eligible for installation in paragraph 
(h)(1) of this AD.

(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)(1) 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.

(l) Related Information

    (1) For more information about this AD, contact Mark Taylor, 
Aviation Safety Engineer, ECO Branch, FAA, 1200 District Avenue, 
Burlington, MA 01803; phone: (781) 238-7229; email: 
[email protected].
    (2) Service information identified in this AD that is not 
incorporated by reference is available at the addresses specified in 
paragraphs (m)(3) and (4) of this AD.

(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 Service Bulletin PW1000G-C-72-00-0188-00A-
930A-D, Issue No: 002, dated July 8, 2022.
    (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) 690-9667; email: [email protected]; 
website: connect.prattwhitney.com.
    (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 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: [email protected], or go to: www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on September 12, 2022.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2022-21308 Filed 9-30-22; 8:45 am]
BILLING CODE 4910-13-P