79474 Federal Register / Vol. 89, No. 189 / Monday, September 30, 2024 / Proposed Rules 

* * * * * 

Rohit Chopra, 

Director, Consumer Financial Protection 

Bureau. 

[FR Doc. 2024–22004 Filed 9–27–24; 8:45 am] 

BILLING CODE 4810–AM–C 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–2318; Project 

Identifier MCAI–2023–00981–E] 

RIN 2120–AA64 

Airworthiness Directives; Austro 

Engine GmbH Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede Airworthiness Directive (AD) 

2023–20–03, which applies to certain 

Austro Engine GmbH Model E4 and E4P 

engines. AD 2023–20–03 requires 

repetitive engine oil analysis for 

aluminum content outside the 

acceptable limits and, if necessary, 

replacement of the pistons, piston rings, 

con-rods assembly, and crankcase or, as 

an alternative, replacement of the 

engine core. Since the FAA issued AD 

2023–20–03, the manufacturer 

identified errors in the lists of affected 

engines and provided updated 

information, which prompted this 

proposed AD. This proposed AD would 

retain the requirements of AD 2023–20– 

03, add compliance times for additional 

affected engine serial numbers, and 

remove certain engine serial numbers 

from the applicability of the existing 

AD. The FAA is proposing this AD to 

address the unsafe condition on these 

products. 

DATES: The FAA must receive comments 

on this NPRM by November 14, 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–2024–2318; 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 Austro Engine GmbH material 

identified in this proposed AD, contact 

Austro Engine GmbH, Rudolf-DieselStrasse 11, A–2700 Weiner Neustadt, 

Austria; phone: +43 2622 23000; 

website: austroengine.at. 

• You may view this material 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. 

FOR FURTHER INFORMATION CONTACT: 

Morton Lee, Aviation Safety Engineer, 

FAA, 1600 Stewart Avenue, Suite 410, 

Westbury, NY 11590; phone: (860) 386– 

1791; email: morton.y.lee@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–2024–2318; Project 

Identifier MCAI–2023–00981–E’’ 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 Morton Lee, Aviation 

Safety Engineer, FAA, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 

11590. 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 2023–20–03, 

Amendment 39–22562 (88 FR 76104, 

November 6, 2023) (AD 2023–20–03), 

for certain Austro Engine GmbH Model 

E4 and E4P engines. AD 2023–20–03 

was prompted by an MCAI originated by 

the European Union Aviation Safety 

Agency (EASA), which is the Technical 

Agent for the Member States of the 

European Union. EASA issued EASA 

AD 2022–0240R1, dated December 15, 

2022 (EASA AD 2022–0240R1), to 

address reports of piston failures. 

AD 2023–20–03 requires repetitive 

engine oil analysis for aluminum 

content outside the acceptable limits 

and, if necessary, replacement of the 

pistons, piston rings, con-rods assembly, 

and crankcase or as an alternative, 

replacement of the engine core. The 

FAA issued AD 2023–20–03 to prevent 

piston failure, which could result in loss 

of oil, loss of engine power, and reduced 

control of the airplane. 

Actions Since AD 2023–20–03 Was 

Issued 

Since the FAA issued AD 2023–20– 

03, EASA superseded EASA AD 2022– 

0240R1 and issued EASA AD 2023– 

0163, dated August 18, 2023 (EASA AD 

2023–0163) (also referred to as the 

MCAI). The MCAI states that a 

manufacturer investigation into reports 

of piston failures determined that 

certain batches of pistons were 

manufactured with a dimensional 

deviation in the piston pin bore and in 

the piston diameter, which could cause 

piston failure, with consequent loss of 

oil, loss of engine power, and reduced 

control of the airplane. To address the 

unsafe condition, EASA issued EASA 

AD 2022–0240, dated December 6, 2022, 

to specify repetitive oil analyses and 


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Federal Register / Vol. 89, No. 189 / Monday, September 30, 2024 / Proposed Rules 79475 

replacement of the pistons, piston rings, 

con-rods assembly, and crankcase, or as 

an alternative, replacement of the 

engine core. EASA AD 2022–0240 also 

prohibited release to service of an 

airplane until receipt of the results for 

each oil analysis. 

Since EASA AD 2022–0240 was 

issued, the manufacturer determined 

that aluminum levels outside of the 

acceptable limits would be found during 

the first oil analysis and would be 

unlikely to be found during subsequent 

oil analyses. As a result, EASA revised 

EASA AD 2022–0240 and issued EASA 

AD 2022–0240R1 to allow release to 

service of airplanes for a limited number 

of flight hours immediately after the 

second and subsequent oil samples are 

taken for analyses. 

Since EASA AD 2022–0240R1 was 

issued, the manufacturer identified 

errors in the lists of affected engine 

serial numbers in the service 

information and issued Mandatory 

Service Bulletin No. MSB–E4–039/2, 

Revision 2, dated July 31, 2023, to revise 

the list of affected engine serial 

numbers, which prompted EASA to 

supersede EASA AD 2022–0240R1 with 

EASA AD 2023–0163, dated August 18, 

2023. Since EASA issued EASA AD 

2023–0163, the manufacturer revised 

the service information again and issued 

Mandatory Service Bulletin No. MSB– 

E4–039/3, Revision 3, dated November 

22, 2023, to amend the labor efforts 

section. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2024–2318. 

Material Incorporated by Reference 

Under 1 CFR Part 51 

The FAA reviewed Austro Engine 

GmbH Mandatory Service Bulletin No. 

MSB–E4–039/3, Revision 3, dated 

November 22, 2023, which identifies 

affected engine serial numbers and 

specifies procedures for oil analysis and 

replacement of the pistons, piston rings, 

con-rods assembly, crankcase, and 

engine core. 

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 

These products have been approved 

by the aviation authority of another 

country and are 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 of 

the requirements of AD 2023–20–03. 

This proposed AD would also add 

compliance times for additional affected 

engine serial numbers and remove 

certain engine serial numbers from the 

applicability of the existing AD, as 

specified in the material already 

described. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 357 

engines installed on aircraft of U.S. 

registry. 

The FAA estimates the following 

costs to comply with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Oil analysis ...................................................... 1 work-hour × $85 per hour = $85 ................. $0 $85 $30,345 

The FAA estimates the following 

costs to do any necessary replacements 

that would be required based on the 

results of the proposed inspection. The 

agency has no way of determining the 

number of engines that might need these 

replacements: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Replace engine core .................................................... 35 work-hours × $85 per hour = $2,975 ...................... $15,524 $18,499 

Replace pistons, piston rings, and con-rod assembly 65 work-hours × $85 per hour = $5,525 ...................... 2,216 7,741 

Replace pistons, piston rings, con-rod assembly, and 

crankcase.

75 work-hours × $85 per hour = $6,375 ...................... 4,141 10,516 

The FAA has included all known 

costs in its cost estimate. According to 

the manufacturer, however, some of the 

costs of this proposed 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 

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 


ddrumheller on DSK120RN23PROD with PROPOSALS1
79476 Federal Register / Vol. 89, No. 189 / Monday, September 30, 2024 / Proposed Rules 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that the 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 2023–20–03, Amendment 39–22562 

(88 FR 76104, November 6, 2023); and 

■ b. Adding the following new 

airworthiness directive: 

Austro Engine GmbH: Docket No. FAA– 

2024–2318; Project Identifier MCAI– 

2023–00981–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by November 

14, 2024. 

(b) Affected ADs 

This AD replaces AD 2023–20–03, 

Amendment 39–22562 (88 FR 76104, 

November 6, 2023) (AD 2023–20–03). 

(c) Applicability 

This AD applies to Austro Engine GmbH 

Model E4 and E4P engines with an engine 

serial number (ESN) listed in Tables 1, 2, 3, 

and 4 of Austro Engine GmbH Mandatory 

Service Bulletin No. MSB–E4–039/3, 

Revision 3, dated November 22, 2023 (Austro 

MSB–E4–039/3). 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 8530, Reciprocating Engine Cylinder 

Section; 8550, Reciprocating Engine Oil 

System. 

(e) Unsafe Condition 

This AD was prompted by reports of piston 

failures and the determination that certain 

batches of pistons were manufactured with a 

dimensional deviation in the piston pin bore 

and piston diameter. The FAA is issuing this 

AD to prevent piston failure. The unsafe 

condition, if not addressed, could result in 

loss of oil, loss of engine power, and reduced 

control of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) For all affected engines, within the 

applicable compliance times specified in 

Table 1 to paragraph (g)(1) of this AD, 

perform an oil analysis in accordance with 

paragraph 2., Technical Details, Engine Oil 

Analysis of Austro MSB–E4–039/3, and do 

not return the engine to service until the 

results of the oil analysis have been 

determined. 

TABLE 1 TO PARAGRAPH (g)(1)—OIL ANALYSIS FOR ALL AFFECTED ENGINES

Engine group Compliance time Interval 

Group 1 and Group 3 engines that do not have 

an ESN identified in Table 2 to paragraph 

(g)(1) of this AD.

Within 15 flight hours (FHs) from December 

11, 2023 (the effective date of AD 2023– 

20–03).

Before exceeding 50 FHs since last oil analysis. 

Group 1 and Group 3 engines that have an 

ESN identified in Table 2 to paragraph (g)(1) 

of this AD.

Within 15 FHs from the effective date of this 

AD.

Before exceeding 50 FHs since last oil analysis. 

Group 2 and Group 4 engines that do not have 

an ESN identified in Table 2 to paragraph 

(g)(1) of this AD.

Within 25 FHs from December 11, 2023 (the 

effective date of AD 2023–20–03).

Before exceeding 100 FHs since last oil analysis. 

Group 2 and Group 4 engines that have an 

ESN identified in Table 2 to paragraph (g)(1) 

of this AD.

Within 25 FHs from the effective date of this 

AD.

Before exceeding 100 FHs since last oil analysis. 

TABLE 2 TO PARAGRAPH (g)(1)—AFFECTED ESNS NOT INCLUDED IN AD 2023–20–03 

Engine group ESN ESN ESN ESN 

Group 1 ............................................................................................................ E4–A–06367 E4–A–06248 ........................ ........................

Group 2 ............................................................................................................ E4–C–06249 E4P–C–06185 ........................ ........................

Group 3 ............................................................................................................ E4–A–05072 E4–A–05074 E4–A–05075 E4–A–05078 

Group 3 ............................................................................................................ E4–A–05079 E4–A–05080 E4–A–05081 E4–A–05082 

Group 3 ............................................................................................................ E4–A–05083 E4–A–05084 E4–A–05085 E4–A–05086 

Group 3 ............................................................................................................ E4–A–05087 ........................ ........................ ........................

Group 4 ............................................................................................................ E4–C–00559 E4–C–05089 E4–C–05090 E4–C–05091 

Group 4 ............................................................................................................ E4–C–05092 E4–C–05093 E4–C–05094 E4–C–05096 

Group 4 ............................................................................................................ E4–C–05098 E4–C–05099 E4–C–05100 E4–C–05101 

Group 4 ............................................................................................................ E4–C–05102 E4–C–05103 E4–C–05104 E4–C–05105 

Group 4 ............................................................................................................ E4–C–05106 E4–C–05107 E4–C–05108 E4–C–05109 

Group 4 ............................................................................................................ E4–C–05110 E4–C–05111 E4P–C–06073 ........................

(2) Thereafter, repeat the oil analysis 

required by paragraph (g)(1) of this AD before 

exceeding the applicable interval specified in 

Table 1 to paragraph (g)(1) of this AD. 

(3) Following each repetitive oil analysis, 

the engine may be returned to service for no 

more than the applicable interval specified in 

Table 1 to paragraph (g)(1) of this AD, until 

receipt of the oil analysis result. 

(4) If the result of any oil analysis required 

by paragraph (g)(1) of this AD indicates the 

aluminum content of the oil is greater than 

the limit specified in paragraph 2., Technical 

Details, Engine Oil Analysis, Table 5—Oil 


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Federal Register / Vol. 89, No. 189 / Monday, September 30, 2024 / Proposed Rules 79477 

check analysis—Aluminum PPM allowable; 

of Austro MSB–E4–039/3, before further 

flight, replace the pistons, piston rings, conrods assembly, and crankcase, or replace the 

engine core in accordance with paragraph 2., 

Technical Details, Engine core replacement; 

or Pistons, piston rings, crankcase and conrod assy replacement; as applicable, of 

Austro MSB–E4–039/3. 

(5) For Group 3 and Group 4 engines, 

within the applicable compliance times 

specified in Table 3 to paragraph (g)(5) of this 

AD, replace the pistons, piston rings, and 

con-rods assembly, or replace the engine core 

in accordance with paragraph 2., Technical 

Details, Engine core replacement; or Pistons, 

piston rings and con-rod assy replacement, as 

applicable, of Austro MSB–E4–039/3. 

TABLE 3 TO PARAGRAPH (g)(5)—REPLACEMENT FOR GROUP 3 AND 4 ENGINES

Engine group Compliance time 

Group 3 engines that do not have an ESN identified in Table 2 to paragraph (g)(1) of this AD.Before exceeding 900 FHs since new, or within 15 FHs after December 11, 2023 (the effective date of AD 2023–20–03), whichever occurs later. 

Group 3 engines that have an ESN identified in Table 2 to paragraph 

(g)(1) of this AD.

Before exceeding 900 FHs since new, or within 15 FHs after the effective date of this AD, whichever occurs later 

Group 4 engines that do not have an ESN identified in Table 2 to paragraph (g)(1) of this AD.Before exceeding 1,000 FHs since new, or within 25 FHs after December 11, 2023 (the effective date of AD 2023–20–03), whichever occurs later. 

Group 4 engines that have an ESN identified in Table 2 to paragraph 

(g)(1) of this AD.

Before exceeding 1,000 FHs since new, or within 25 FHs after the effective date of this AD, whichever occurs later. 

Note 1 to paragraph (g)(5): FHs since new 

indicated in Table 3 to paragraph (g)(5) of 

this AD are FHs accumulated by the engine 

since first installation on an airplane or since 

last overhaul as of December 11, 2023 (the 

effective date of AD 2023–20–03) for Group 

3 and 4 engines that do not have an ESN 

identified in Table 2 to paragraph (g)(1) of 

this AD, or as of the effective date of this AD 

for Group 3 and 4 engines that have an ESN 

identified in Table 2 to paragraph (g)(1) of 

this AD. 

(h) Terminating Action 

(1) Replacement of the pistons, piston 

rings, con-rods assembly, and crankcase, or 

replacement of the engine core, as specified 

in paragraph (g)(4) of this AD, constitutes 

terminating action for the repetitive oil 

analysis required by paragraph (g)(2) of this 

AD. 

(2) Replacement of the pistons, piston 

rings, and con-rods assembly, or replacement 

of the engine core, as specified in paragraph 

(g)(5) of this AD, constitutes terminating 

action for the repetitive oil analysis required 

by paragraph (g)(2) of this AD. 

(i) Definitions 

For the purpose of this AD: 

(1) Group 1 engines are engines having an 

ESN listed in Table 1 of No. MSB–E4–039/ 

3. 

(2) Group 2 engines are engines having an 

ESN listed in Table 2 of No. MSB–E4–039/ 

3. 

(3) Group 3 engines are engines having an 

ESN listed in Table 3 of No. MSB–E4–039/ 

3. 

(4) Group 4 engines are engines having an 

ESN listed in Table 4 of No. MSB–E4–039/ 

3. 

(j) Credit for Previous Actions 

(1) You may take credit for the actions 

required by paragraph (g)(1), (4), or (5) of this 

AD, if you performed those actions before 

December 11, 2023 (the effective date of AD 

2023–20–03) using Austro Engine GmbH 

Mandatory Service Bulletin No. MSB–E4– 

039/0, dated October 24, 2022. 

(2) You may take credit for the actions 

required by paragraph (g)(1), (4), or (5) of this 

AD if you performed those actions before the 

effective date of this AD using Austro Engine 

GmbH Mandatory Service Bulletin No. MSB– 

E4–039/2, Revision 2, dated July 26, 2023. 

(k) No Return of Parts/Reporting 

Requirement 

Although the service information specifies 

returning certain parts and submitting certain 

information to the manufacturer, this AD 

does not include those requirements. 

(l) Alternative Methods of Compliance 

(AMOCs) 

(1) 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 local 

Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the International Validation 

Branch, send it to the attention of the person 

identified in paragraph (m)(1) 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. 

(m) Additional Information 

(1) For more information about this AD, 

contact Morton Lee, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; phone: (860) 386– 

1791; email: morton.y.lee@faa.gov. 

(2) Material identified in this AD that is not 

incorporated by reference is available at the 

address specified in paragraph (n)(3) of this 

AD. 

(n) 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 the AD specifies otherwise. 

(i) Austro Engine GmbH Mandatory Service 

Bulletin No. MSB–E4–039/3, Revision 3, 

dated November 22, 2023. 

(ii) [Reserved] 

(3) For Austro Engine GmbH material 

identified in this AD, contact Austro Engine 

GmbH, Rudolf-Diesel-Strasse 11, A–2700 

Weiner Neustadt, Austria; phone: +43 2622 

23000; website: austroengine.at. 

(4) You may view this material 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 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 September 23, 2024. 

Steven W. Thompson, 

Acting Deputy Director, Compliance & 

Airworthiness Division, Aircraft Certification 

Service. 

[FR Doc. 2024–22064 Filed 9–27–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–2320; Project 

Identifier MCAI–2024–00268–T] 

RIN 2120–AA64 

Airworthiness Directives; Airbus SAS 

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 


ddrumheller on DSK120RN23PROD with PROPOSALS1