71464 Federal Register / Vol. 88, No. 199 / Tuesday, October 17, 2023 / Rules and Regulations 

any service information contains procedures 

or tests that are identified as RC, those 

procedures and tests must be done to comply 

with this AD; any procedures or tests that are 

not identified as RC are recommended. Those 

procedures and tests that are not identified 

as RC may be deviated from using accepted 

methods in accordance with the operator’s 

maintenance or inspection program without 

obtaining approval of an AMOC, provided 

the procedures and tests identified as RC can 

be done and the airplane can be put back in 

an airworthy condition. Any substitutions or 

changes to procedures or tests identified as 

RC require approval of an AMOC. 

(j) Additional Information 

For more information about this AD, 

contact Timothy Dowling, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 206– 

231–3667; email timothy.p.dowling@faa.gov. 

(k) 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) European Union Aviation Safety Agency 

(EASA) AD 2023–0029, dated February 1, 

2023. 

(ii) [Reserved] 

(3) For EASA AD 2023–0029, contact 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 8999 

000; email ADs@easa.europa.eu; website 

easa.europa.eu. You may find this EASA AD 

on the EASA website at ad.easa.europa.eu. 

(4) You may view this service information 

at the FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 216th 

St., 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 5, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–22874 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–2023–1493; Project 

Identifier MCAI–2022–01105–T; Amendment 

39–22569; AD 2023–20–10] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc., Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Bombardier, Inc., Model BD–700–2A12 

airplanes. This AD was prompted by a 

report that some of the multi-function 

spoiler (MFS) anti-rotation plates failed 

in-service due to a thin wall design. 

This AD requires replacing the MFS 

anti-rotation plates, inspecting the MFS 

anti-rotation plates for cracking and 

hinge bolts for evidence of rotation, 

accomplishing applicable corrective 

actions, and performing a functional test 

of the MFS control surfaces. The FAA 

is issuing this AD to address the unsafe 

condition on these products. 

DATES: This AD is effective November 

21, 2023. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of November 21, 2023. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1493; 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, the mandatory 

continuing airworthiness information 

(MCAI), 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 service information identified 

in this final rule, contact Bombardier 

Business Aircraft Customer Response 

Center, 400 Coˆte-Vertu Road West, 

Dorval, Que ́bec H4S 1Y9, Canada; 

telephone 514–855–2999; email ac.yul@

aero.bombardier.com; website 

bombardier.com. 

• You may view this service 

information at the FAA, Airworthiness 

Products Section, Operational Safety 

Branch, 2200 South 216th St., Des 

Moines, WA. For information on the 

availability of this material at the FAA, 

call 206–231–3195. It is also available at 

regulations.gov under Docket No. FAA– 

2023–1493. 

FOR FURTHER INFORMATION 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. 

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 serial-numbered 

Bombardier, Inc., Model BD–700–2A12 

airplanes. The NPRM published in the 

Federal Register on July 14, 2023 (88 FR 

45121). The NPRM was prompted by 

AD CF–2022–47R1, dated October 11, 

2022, issued by Transport Canada, 

which is the aviation authority for 

Canada (referred to after this as ‘‘the 

MCAI’’). The MCAI states that a report 

was received that some of the MFS antirotation plates failed in-service due to a 

thin wall design. The MFS anti-rotation 

plates were designed with overlapping 

tolerances on the inside and outside 

diameters, which allows for an 

extremely thin wall thickness once 

machined. 

In the NPRM, the FAA proposed to 

require replacing the MFS anti-rotation 

plates, inspecting the MFS anti-rotation 

plates for cracking and hinge bolts for 

evidence of rotation, accomplishing 

applicable corrective actions, and 

performing a functional test of the MFS 

control surfaces. The FAA is issuing this 

AD to address MFS anti-rotation plate 

failures. The unsafe condition, if not 

addressed, could result in wear and 

failure of the inboard and outboard 

spoiler hinge pins, possibly resulting in 

a hinge no longer supporting the load, 

or unintended asymmetrical spoiler 

deployment, leading to reduced 

controllability of the airplane, or loss of 

control of the airplane. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–1493. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received no comments on 

the NPRM or on the determination of 

the cost to the public. 

Conclusion 

This product has been approved by 

the aviation authority of another 

country and is approved for operation in 


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Federal Register / Vol. 88, No. 199 / Tuesday, October 17, 2023 / Rules and Regulations 71465 

the United States. Pursuant to the FAA’s 

bilateral agreement with this State of 

Design Authority, it has notified the 

FAA of the unsafe condition described 

in the MCAI referenced above. The FAA 

reviewed the relevant data and 

determined that air safety requires 

adopting this AD as proposed. 

Accordingly, the FAA is issuing this AD 

to address the unsafe condition on this 

product. This AD is adopted as 

proposed in the NPRM. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Bombardier 

Service Bulletin 700–27–7504, Revision 

01, dated July 11, 2022. This service 

information specifies procedures for 

replacing the left and right MFS No. 1, 

MFS No. 2, and MFS No. 3 anti-rotation 

plate part number (P/N) G05770140–103 

and P/N G05770160–101 with P/N 

G05770140–105. In addition, one of the 

procedural steps is to inspect the MFS 

anti-rotation plates for cracking and the 

hinge bolt for any evidence of rotation, 

and repair or replacement. This service 

information also specifies procedures 

for performing a functional test (stop-tostop check) of the MFS control-surfaces. 

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 the ADDRESSES section. 

Costs of Compliance 

The FAA estimates that this AD 

affects 42 airplanes of U.S. registry. The 

FAA estimates the following costs to 

comply with this AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Labor cost Parts cost Cost per 

product 

Cost on U.S. 

perators 

3 work-hours × $85 per hour = $255 .......................................................................................... $2,000 $2,255 $94,710 

The FAA has received no definitive 

data on which to base the cost estimates 

for the on-condition repairs or 

replacements specified in this AD. 

The FAA has included all known 

costs in its cost estimate. According to 

the manufacturer, however, some or all 

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 

■ 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: 

2023–20–10 Bombardier, Inc.: Amendment 

39–22569; Docket No. FAA–2023–1493; 

Project Identifier MCAI–2022–01105–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective November 21, 2023. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Bombardier, Inc., 

Model BD–700–2A12 airplanes, certificated 

in any category, serial numbers 70006 

through 70129 inclusive. 

(d) Subject 

Air Transport Association (ATA) of 

America Code: 27, Flight controls. 

(e) Unsafe Condition 

This AD was prompted by a report that 

some of the multi-function spoiler (MFS) 

anti-rotation plates failed in-service due to a 

thin wall design. The FAA is issuing this AD 

to address MFS anti-rotation plate failures. 

The unsafe condition, if not addressed, could 

result in wear and failure of the inboard and 

outboard spoiler hinge pins, possibly 

resulting in a hinge no longer supporting the 

load, or unintended asymmetrical spoiler 

deployment, leading to reduced 

controllability of the airplane, or loss of 

control of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Replacement and Inspection 

(1) Within 36 months after the effective 

date of this AD, replace the left and right 

MFS No. 1, MFS No. 2, and MFS No. 3 antirotation plate part number (P/N) G05770140– 

103 and P/N G05770160–101 with P/N 

G05770140–105, including inspecting the 

MFS anti-rotation plates for any cracking and 

the hinge bolts for any evidence of rotation, 

in accordance with Part 2.B. of the 

Accomplishment Instructions of Bombardier 

Service Bulletin 700–27–7504, Revision 01, 

dated July 11, 2022. If any cracking or 

evidence of rotation is found, before further 

flight, repair using a method approved in 

accordance with the procedures specified in 

paragraph (i)(1) of this AD. 

(2) Before further flight after accomplishing 

the actions specified in paragraph (g)(1) of 

this AD: Perform a functional test (stop-toVerDate Sep<11>2014 15:56 Oct 16, 2023 Jkt 262001 PO 00000 Frm 00007 Fmt 4700 Sfmt 4700 E:\FR\FM\17OCR1.SGM 17OCR1

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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 


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