88910 Federal Register / Vol. 89, No. 218 / Tuesday, November 12, 2024 / Proposed Rules 

(c) Applicability 

This proposed AD applies to International 

Aero Engines (IAE AG) Model V2522–A5, 

V2524–A5, V2525–D5, V2527–A5, V2527E– 

A5, V2527M–A5, V2528–D5, V2530–A5, 

V2531–E5, and V2533–A5 engines. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7250, Turbine Engine Compressor 

Sections. 

(e) Unsafe Condition 

This AD was prompted by further analysis 

of an event involving an IAE AG model 

V2533–A5 engines that experienced an 

uncontained high-pressure turbine (HPT) 1ststage hub failure that resulted in high-energy 

debris penetrating the engine cowling. The 

FAA is issuing this AD to prevent failure of 

the HPT 1st-stage hub and HPT 2nd-stage 

hub. The unsafe condition, if not addressed, 

could result in an uncontained hub failure, 

release of high-energy debris, damage to the 

engine, damage to the airplane, and loss of 

the airplane. 

(f) Compliance 

Comply with this proposed AD within the 

compliance times specified, unless already 

done. 

(g) Required Action 

Within 90 days after the effective date of 

this AD; revise the ‘‘Maintenance 

Scheduling’’ paragraph of the Airworthiness 

Limitations Section (ALS) of the existing 

approved engine maintenance manual (EMM) 

or instructions for continued airworthiness 

and your existing approved maintenance or 

inspection program, as applicable; by 

incorporating the information specified in 

table 1 to paragraph (g) of this AD, as 

applicable. 

TABLE 1 TO PARAGRAPH (g)—ALS ADDITIONAL INSPECTIONS

Part nomenclature Part No. Inspection (engine manual reference) 

HPT Stage 1 Hub ...... 2A5001 ......... TASK 72–45–11–200–006. 

HPT Stage 2 Hub ...... 2A4802 ......... TASK 72–45–11–200–009. 

(h) Provisions for Alternative Actions 

After the action required by paragraph (g) 

of this AD has been done, no alternative 

actions are allowed unless they are approved 

as specified in the provisions of paragraph (i) 

of this AD. 

(i) 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 (j) of this AD and email to: 

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. 

(j) 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: carol.nguyen@faa.gov. 

(k) Material Incorporated by Reference 

None. 

Issued on November 4, 2024. 

Peter A. White, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2024–26092 Filed 11–8–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–2420; Project 

Identifier MCAI–2024–00143–T] 

RIN 2120–AA64 

Airworthiness Directives; De Havilland 

Aircraft of Canada Limited (Type 

Certificate Previously Held by 

Bombardier, Inc.) Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede Airworthiness Directive (AD) 

2022–01–02, which applies to certain 

De Havilland Aircraft of Canada Limited 

Model DHC–8–400, –401, and –402 

airplanes. AD 2022–01–02 requires 

inspecting for corrosion of the nacelle to 

wing rear spar attachment pins, and the 

nacelle to landing gear attachment pins, 

and doing all applicable corrective 

actions. Since the FAA issued AD 2022– 

01–02, it was discovered that some 

operators were unable to identify the 

airplanes subject to each requirement. 

This proposed AD would continue to 

require the actions specified in AD 

2022–01–02, clarify the affected 

airplanes for each required action, and 

revise the applicability by removing 

Model DHC–8–400 airplanes, as 

specified in a Transport Canada AD, 

which is proposed for incorporation by 

reference (IBR). This proposed AD 

would also revise a certain compliance 

time. The FAA is proposing this AD to 

address the unsafe condition on these 

products. 

DATES: The FAA must receive comments 

on this proposed AD by December 27, 

2024. 

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–2024–2420; 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 NPRM, the mandatory 

continuing airworthiness information 

(MCAI), any comments received, and 

other information. The street address for 

Docket Operations is listed above. 

Material Incorporated by Reference: 

• For Transport Canada material 

identified in this proposed AD, contact 

Transport Canada, Transport Canada 

National Aircraft Certification, 159 

Cleopatra Drive, Nepean, Ontario K1A 

0N5, Canada; telephone 888–663–3639; 

email TC.AirworthinessDirectivesConsignesdenavigabilite.TC@tc.gc.ca; 

website at tc.canada.ca/en/aviation. 

• You may view this material at the 

FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 

216th St., Des Moines, WA. For 


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information on the availability of this 

material at the FAA, call 206–231–3195. 

FOR FURTHER INFORMATION CONTACT: 

Fatin Saumik, 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: 

Comments Invited 

The FAA invites you to send any 

written relevant data, views, or 

arguments about this proposal. Send 

your comments to an address listed 

under the ADDRESSES section. Include 

‘‘Docket No. FAA–2024–2420; Project 

Identifier MCAI–2024–00143–T’’ at the 

beginning of your comments. The most 

helpful comments reference a specific 

portion of the proposal, 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 the 

proposal 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 NPRM. 

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 NPRM 

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 NPRM, 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 

NPRM. Submissions containing CBI 

should be sent to Fatin Saumik, 

Aviation Safety Engineer, FAA, 1600 

Stewart Avenue, Suite 410, Westbury, 

NY 11590; telephone 516–228–7300; 

email 9-avs-nyaco-cos@faa.gov. 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 issued AD 2022–01–02, 

Amendment 39–21890 (87 FR 4145, 

January 27, 2022) (AD 2022–01–02), for 

certain De Havilland Aircraft of Canada 

Limited Model DHC–8–400, –401, and 

–402 airplanes. AD 2022–01–02 was 

prompted by MCAI originated by 

Transport Canada, which is the aviation 

authority for Canada. Transport Canada 

issued AD CF–2020–51R1, dated 

February 24, 2021 (Transport Canada 

AD CF–2020–51R1), to correct an unsafe 

condition. 

AD 2022–01–02 requires doing a 

detailed visual inspection of the nacelle 

to wing rear spar attachment pins, and 

the nacelle to landing gear attachment 

pins, for any corrosion, and doing all 

applicable corrective actions. The FAA 

issued AD 2022–01–02 to address 

premature corrosion and subsequent 

failure of the nacelle to landing gear and 

nacelle to rear wing spar attachment 

pins, which, if undetected, could lead to 

a single or dual collapse of the main 

landing gear. 

Actions Since AD 2022–01–02 Was 

Issued 

Since the FAA issued AD 2022–01– 

02, Transport Canada superseded AD 

CF–2020–51R1, dated February 24, 

2021. Transport Canada AD CF–2020– 

51R2, dated February 27, 2024 

(Transport Canada AD CF–2020–51R2) 

(referred to after this as the MCAI), was 

issued to correct an unsafe condition on 

certain De Havilland Aircraft of Canada 

Limited Model DHC–8–401 and –402 

airplanes. 

The MCAI provides clarification of 

the applicability for each of its parts 

(Parts I through V) and otherwise 

maintains the requirements of AD CF– 

2020–51R1. It also revises the 

applicability section to remove Model 

DHC–8–400 airplanes since no model 

DHC–8–400 airplanes have been 

delivered. 

In addition, the FAA discovered an 

error in AD 2022–01–02, which 

included a compliance time that 

incorrectly used the number of flight 

cycles on the airplane instead of on the 

pins. 

The FAA is proposing this AD to 

address premature corrosion and 

subsequent failure of the nacelle to 

landing gear and nacelle to rear wing 

spar attachment pins, which, if 

undetected, could lead to a single or 

dual collapse of the main landing gear. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2024–2420. 

Explanation of Retained Requirements 

Although this proposed AD does not 

explicitly restate the requirements of AD 

2022–01–02, this proposed AD would 

retain all of the requirements of AD 

2022–01–02. Those requirements are 

referenced in Transport Canada AD CF– 

2020–51R2, which, in turn, is 

referenced in paragraph (g) of this 

proposed AD. 

Related Material Under 1 CFR Part 51 

Transport Canada AD CF–2020–51R2 

specifies procedures for doing a detailed 

visual inspection of the nacelle to wing 

rear spar attachment pins, and the 

nacelle to landing gear attachment pins, 

for any corrosion; and doing all 

applicable corrective actions. Corrective 

actions include applying epoxy primer 

to the bore surface of the pins, 

performing a fluorescent magnetic 

particle inspection for any cracking, 

removing corrosion, reworking and part 

marking certain pins, and replacing any 

cracked or corroded pins with 

serviceable pins. 

This material 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. 

FAA’s Determination 

This product has been approved by 

the aviation authority of another 

country and is approved for operation in 

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 and material referenced 

above. The FAA is issuing this NPRM 

after determining that the unsafe 

condition described previously is likely 

to exist or develop on other products of 

the same type design. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would retain all 

requirements of AD 2022–01–02 and 

clarify the airplanes subject to each 

requirement. This proposed AD would 

remove Model DHC–8–400 airplanes 

from the applicability and revise a 

certain compliance time as specified in 

an exception in paragraph (h)(2) of this 

proposed AD. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 41 

airplanes of U.S. registry. 

The FAA estimates the following 

costs to comply with this proposed AD: 


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ESTIMATED COSTS FOR REQUIRED ACTIONS

Labor cost Parts cost Cost per product Cost on U.S. operators 

Up to 25 work-hours × $85 per hour = Up to $2,125 ..... Up to $21 ........................... Up to $2,146 ...................... Up to $87,986. 

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 

The FAA determined that this 

proposed AD would not have federalism 

implications under Executive Order 

13132. This proposed AD would 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 this proposed regulation: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Would not affect intrastate 

aviation in Alaska, and 

(3) Would 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 Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 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: 

■ a. Removing Airworthiness Directive 

(AD) 2022–01–02, Amendment 39– 

21890 (87 FR 4145, January 27, 2022); 

and 

■ b. Adding the following new AD: 

De Havilland Aircraft of Canada Limited 

(Type Certificate Previously Held by 

Bombardier, Inc.): Docket No. FAA– 

2024–2420; Project Identifier MCAI– 

2024–00143–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by December 27, 

2024. 

(b) Affected ADs 

This AD replaces AD 2022–01–02, 

Amendment 39–21890 (87 FR 4145, January 

27, 2022) (AD 2022–01–02). 

(c) Applicability 

This AD applies to De Havilland Aircraft 

of Canada Limited (type certificate 

previously held by Bombardier, Inc.) Model 

DHC–8–401 and –402 airplanes, certificated 

in any category, as identified in Transport 

Canada AD CF–2020–51R2, dated February 

27, 2024 (Transport Canada AD CF–2020– 

51R2). 

(d) Subject 

Air Transport Association (ATA) of 

America Code 54, Nacelles/pylons. 

(e) Unsafe Condition 

This AD was prompted by a report that the 

epoxy primer on the internal bore of the 

nacelle and landing gear attachment pins was 

not applied, and corrosion on the internal 

bore of the wing rear spar attachment pins 

was found. The FAA is issuing this AD to 

address premature corrosion and subsequent 

failure of the nacelle to landing gear and 

nacelle to rear wing spar attachment pins. 

The unsafe condition, if not addressed, could 

result a single or dual collapse of the main 

landing gear. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

Except as specified in paragraph (h) of this 

AD: Comply with all required actions and 

compliance times specified in, and in 

accordance with, Transport Canada AD CF– 

2020–51R2. 

(h) Exceptions to Transport Canada AD 

2022–01–02 

(1) Where Transport Canada AD 2022–01– 

02 refers to ‘‘the effective date of CF–2020– 

51, 9 December 2020,’’ this AD requires using 

March 3, 2022 (the effective date of AD 2022– 

01–02). 

(2) Where paragraph A. of Parts I, II, and 

III, and Parts IV and V, of Transport Canada 

AD CF–2020–51R2 specify the compliance 

time, for this AD, the compliance time for 

paragraph A. of Parts I, II, and III, and for 

Parts IV and V, of Transport Canada AD CF– 

2020–51R2 is at the later of the times in 

paragraphs (h)(2)(i) and (ii) of this AD. 

(i) Prior to the pins reaching 14 years from 

their entry-into-service or prior to the pins 

reaching 30,000 total flight cycles, whichever 

occurs first. 

(ii) Within 30 days after the effective date 

of this AD. 

(i) Additional AD Provisions 

(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) of this AD. Information may be 

emailed to AMOC@faa.gov. 

(i) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(ii) AMOCs approved previously for AD 

2022–01–02 are approved as AMOCs for the 

corresponding provisions of Transport 

Canada AD CF–2020–51R2 that are required 

by paragraph (g) of this AD. 

(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 De 

Havilland Aircraft of Canada Limited’s 

Transport Canada Design Approval 

Organization (DAO). If approved by the DAO, 

the approval must include the DAOauthorized signature. 

(j) Additional Information 

For more information about this AD, 

contact Fatin Saumik, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 516– 

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


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(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the material listed in this paragraph 

under 5 U.S.C. 552(a) and 1 CFR part 51. 

(2) You must use this material as 

applicable to do the actions required by this 

AD, unless this AD specifies otherwise. 

(i) Transport Canada AD CF–2020–51R2, 

dated February 27, 2024. 

(ii) [Reserved] 

(3) For Transport Canada material 

identified in this AD, contact Transport 

Canada, Transport Canada National Aircraft 

Certification, 159 Cleopatra Drive, Nepean, 

Ontario K1A 0N5, Canada; telephone 888– 

663–3639; email TC.AirworthinessDirectivesConsignesdenavigabilite.TC@tc.gc.ca; 

website tc.canada.ca/en/aviation. 

(4) You may view this material 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 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 fr.inspection@nara.gov. 

Issued on November 4, 2024. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2024–25982 Filed 11–8–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–2422; Project 

Identifier MCAI–2024–00378–T] 

RIN 2120–AA64 

Airworthiness Directives; ATR—GIE 

Avions de Transport Re ́gional 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for all 

ATR—GIE Avions de Transport 

Re ́gional Model ATR72 airplanes. This 

proposed AD was prompted by reports 

of the main landing gear (MLG) rear 

hinge pin being ruptured. This proposed 

AD would require replacing affected 

parts and prohibit the installation of 

affected parts, as specified in a 

European Union Aviation Safety Agency 

(EASA) AD, which is proposed for 

incorporation by reference (IBR). The 

FAA is proposing this AD to address the 

unsafe condition on these products. 

DATES: The FAA must receive comments 

on this proposed AD by December 27, 

2024. 

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–2024–2422; 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 NPRM, the mandatory 

continuing airworthiness information 

(MCAI), any comments received, and 

other information. The street address for 

Docket Operations is listed above. 

Material Incorporated by Reference: 

• For EASA material identified in this 

AD, contact EASA, Konrad-AdenauerUfer 3, 50668 Cologne, Germany; phone: 

+49 221 8999 000; email: ADs@

easa.europa.eu; website easa.europa.eu. 

You may find this material on the EASA 

website at ad.easa.europa.eu. It is also 

available at regulations.gov under 

Docket No. FAA–2024–2422. 

• You may view this material 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. 

FOR FURTHER INFORMATION CONTACT: 

Shahram Daneshmandi, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; phone: 

206–231–3220; email: 

Shahram.Daneshmandi@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

The FAA invites you to send any 

written relevant data, views, or 

arguments about this proposal. Send 

your comments to an address listed 

under the ADDRESSES section. Include 

‘‘Docket No. FAA–2024–2422; Project 

Identifier MCAI–2024–00378–T’’ at the 

beginning of your comments. The most 

helpful comments reference a specific 

portion of the proposal, 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 

proposal 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 NPRM. 

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 NPRM 

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 NPRM, 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 

NPRM. Submissions containing CBI 

should be sent to Shahram 

Daneshmandi, Aviation Safety Engineer, 

FAA, 1600 Stewart Avenue, Suite 410, 

Westbury, NY 11590; phone: 206–231– 

3220; email: Shahram.Daneshmandi@

faa.gov. Any commentary that the FAA 

receives which is not specifically 

designated as CBI will be placed in the 

public docket for this rulemaking. 

Background 

EASA, which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2024–0124, 

dated July 1, 2024 (EASA AD 2024– 

0124) (also referred to as the MCAI), to 

correct an unsafe condition on all 

ATR—GIE Avions de Transport 

Re ́gional Model ATR72–101, –102, 

–201, –202, –211, –212, and –212A 

airplanes. The MCAI states that several 

occurrences of a ruptured MLG rear 

hinge pin having part number (P/N) 

D61000 have been reported (including 

cracked or burnt pins). An investigation 

on all MLG rear hinge pin batches 

revealed that six pins were subjected to 

non-detected thermal abuse in 

production during grinding process. 

This condition, if not corrected, could 

lead to structural failure and consequent 


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