71466 Federal Register / Vol. 88, No. 199 / Tuesday, October 17, 2023 / Rules and Regulations 

stop check) of the MFS control-surfaces in 

accordance with Step 2.C. (3) of the 

Accomplishment Instructions of Bombardier 

Service Bulletin 700–27–7504, Revision 01, 

dated July 11, 2022. 

(h) Credit for Previous Actions 

This paragraph provides credit for actions 

required by paragraph (g) of this AD, if those 

actions were performed before the effective 

date of this AD using Bombardier Service 

Bulletin 700–27–7504, dated March 2, 2022. 

(i) Additional AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, International 

Validation 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 

responsible Flight Standards Office, as 

appropriate. If sending information directly 

to the manager of the International Validation 

Branch, mail it to the address identified in 

paragraph (j)(2) of this AD. Information may 

be emailed to: 9-avs-nyaco-cos@faa.gov. 

Before using any approved AMOC, notify 

your appropriate principal inspector, or 

lacking a principal inspector, the manager of 

the responsible Flight Standards Office. 

(2) Contacting the Manufacturer: For any 

requirement in this AD to obtain instructions 

from a manufacturer, the instructions must 

be accomplished using a method approved 

by the Manager, International Validation 

Branch, FAA; or Transport Canada or 

Bombardier, Inc.’s Transport Canada Design 

Approval Organization (DAO). If approved by 

the DAO, the approval must include the 

DAO-authorized signature. 

(j) Additional Information 

(1) Refer to Transport Canada AD CF– 

2022–47R1, dated October 11, 2022, for 

related information. This Transport Canada 

AD may be found in the AD docket at 

regulations.gov under Docket No. FAA– 

2023–1493. 

(2) For more information about this AD, 

contact Yaser Osman, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 516– 

228–7300; email 9-avs-nyaco-cos@faa.gov. 

(3) Service information identified in this 

AD that is not incorporated by reference is 

available at the addresses specified in 

paragraphs (k)(3) and (4) of this AD. 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 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) Bombardier Service Bulletin 700–27– 

7504, Revision 01, dated July 11, 2022. 

(ii) [Reserved] 

(3) For service information identified in 

this AD, contact Bombardier Business 

Aircraft Customer Response Center, 400 CoˆteVertu Road West, Dorval, Que ́bec H4S 1Y9, 

Canada; telephone 514–855–2999; email 

ac.yul@aero.bombardier.com; website 

bombardier.com. 

(4) You may view this service information 

at the FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 216th 

Street, Des Moines, WA. For information on 

the availability of this material at the FAA, 

call 206–231–3195. 

(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 fr.inspection@nara.gov, or go to: 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued on October 4, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–22871 Filed 10–16–23; 8:45 am] 

BILLING CODE 4910–13–P 

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. 

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: 

• 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, 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: 

help24@prattwhitney.com; 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 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: mark.taylor@faa.gov. 

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 


lotter on DSK11XQN23PROD with RULES1
Federal Register / Vol. 88, No. 199 / Tuesday, October 17, 2023 / Rules and Regulations 71467 

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 

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

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Replace HPC rear hub ........... 73 work-hours × $85 per hour = $6,205 ................................ $0 $6,205 $0 

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 


lotter on DSK11XQN23PROD with RULES1
71468 Federal Register / Vol. 88, No. 199 / Tuesday, October 17, 2023 / Rules and Regulations 

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 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 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, inflight 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: ANEAD-AMOC@faa.gov. 

(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: mark.taylor@faa.gov. 

(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: help24@prattwhitney.com; 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 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: fr.inspection@nara.gov, or go to: 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

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 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Parts 43 and 91 

[Docket No. FAA–2023–1836; Amdt. Nos. 

43–53 and 91–371] 

RIN 2120–AL70 

Inclusion of Additional Automatic 

Dependent Surveillance-Broadcast 

(ADS–B) Out Technical Standard 

Orders; Incorporation by Reference 

AGENCY: Federal Aviation 

Administration (FAA), U.S. Department 

of Transportation (DOT). 

ACTION: Direct final rule; request for 

comments. 

SUMMARY: This rulemaking amends the 

Automatic Dependent SurveillanceBroadcast (ADS–B) Out requirements to 

allow aircraft meeting the performance 

requirements in Technical Standard 

Order (TSO)–C166c (Extended Squitter 

Automatic Dependent SurveillanceBroadcast (ADS–B) and Traffic 

Information Service-Broadcast (TIS–B) 

Equipment Operating on the Radio 

Frequency of 1090 Megahertz (MHz)), or 

TSO–C154d, (Universal Access 

Transceiver (UAT) ADS–B Equipment 

Operating on the Radio Frequency of 

978 Megahertz (MHz)) to meet the 

regulations. Aircraft equipped with 


lotter on DSK11XQN23PROD with RULES1