95088 Federal Register / Vol. 89, No. 231 / Monday, December 2, 2024 / Rules and Regulations 

send your request to your principal inspector 

or responsible Flight Standards Office, as 

appropriate. If sending information directly 

to the manager of the certification office, 

send it to the attention of the person 

identified in paragraph (j)(1) of this AD. 

Information may be emailed to: AMOC@

faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(3) An AMOC that provides an acceptable 

level of safety may be used for any repair, 

modification, or alteration required by this 

AD if it is approved by The Boeing Company 

Organization Designation Authorization 

(ODA) that has been authorized by the 

Manager, AIR–520, Continued Operational 

Safety Branch, FAA, to make those findings. 

To be approved, the repair method, 

modification deviation, or alteration 

deviation must meet the certification basis of 

the airplane, and the approval must 

specifically refer to this AD. 

(j) Related Information 

(1) For more information about this AD, 

contact Eric Igama, Aviation Safety Engineer, 

FAA, 2200 South 216th Street, Des Moines, 

WA 98198; phone: 562–627–5388; email: 

roderick.igama@faa.gov. 

(2) Material identified in this AD that is not 

incorporated by reference is available at the 

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

AD. 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 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) Boeing Alert Requirements Bulletin 

737–22A1399 RB, dated April 13, 2023. 

(ii) [Reserved] 

(3) For the material identified in this AD, 

contact Boeing Commercial Airplanes, 

Attention: Contractual & Data Services 

(C&DS), 2600 Westminster Blvd., MC 110– 

SK57, Seal Beach, CA 90740–5600; telephone 

562–797–1717; website myboeingfleet.com. 

(4) 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. 

(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 7, 2024. 

Peter A. White, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2024–28134 Filed 11–29–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–2014; Project 

Identifier MCAI–2024–00162–E; Amendment 

39–22883; AD 2024–23–04] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 2023–21– 

08 for certain Rolls-Royce Deutschland 

Ltd & Co KG (RRD) Model Trent 1000 

engines. AD 2023–21–08 required 

revisions to the airworthiness limitation 

section (ALS) of the operator’s existing 

approved aircraft maintenance program 

(AMP). This AD was prompted by the 

manufacturer’s revision of the time 

limits manual (TLM) to introduce new 

or more restrictive tasks, limitations, 

and associated thresholds and intervals 

for life-limited parts. This AD requires 

revisions to the ALS of the operator’s 

existing approved AMP, as specified in 

a European Union Aviation Safety 

Agency (EASA) AD, which is 

incorporated by reference. The FAA is 

issuing this AD to address the unsafe 

condition on these products. 

DATES: This AD is effective January 6, 

2025. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of January 6, 2025. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2024–2014; 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 EASA material identified in this 

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

+49 221 8999 000; email: ADs@

easa.europa.eu. You may find this 

material on the EASA website at 

ad.easa.europa.eu. 

• 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. It is also available at 

regulations.gov under Docket No. FAA– 

2024–2014. 

FOR FURTHER INFORMATION CONTACT: 

Barbara Caufield, Aviation Safety 

Engineer, FAA, 2200 South 216th Street, 

Des Moines, WA 98198; phone: (781) 

238–7146; email: barbara.caufield@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 2023–21–08, 

Amendment 39–22580 (88 FR 77889, 

November 14, 2023) (AD 2023–21–08). 

AD 2023–21–08 applied to certain RRD 

Model Trent 1000–A, Trent 1000–AE, 

Trent 1000–C, Trent 1000–CE, Trent 

1000–D, Trent 1000–E, Trent 1000–G, 

and Trent 1000–H engines. AD 2023– 

21–08 required revisions to the ALS of 

the operator’s existing approved AMP as 

specified in EASA AD 2022–0259, dated 

December 20, 2022. The FAA issued AD 

2023–21–08 to prevent the failure of 

critical rotating parts. 

The NPRM published in the Federal 

Register on August 9, 2024 (89 FR 

65270). The NPRM was prompted by 

EASA AD 2024–0062, dated March 6, 

2024 (EASA AD 2024–0062) (also 

referred to as the MCAI), issued by 

EASA, which is the Technical Agent for 

the Member States of the European 

Union. The MCAI states that the 

manufacturer published a revised TLM 

introducing new or more restrictive 

tasks and limitations. These new or 

more restrictive tasks and limitations 

include updating Direct Accumulation 

Counting data files. 

In the NPRM, the FAA proposed to 

retain none of the requirements of AD 

2023–21–08. The NPRM proposed to 

require revising the ALS of the 

operator’s existing approved AMP, as 

specified in EASA AD 2024–0062. The 

FAA is issuing this AD to prevent the 

failure of rotating parts. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2024–2014. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received a comment from 

The Boeing Company, who supported 

the NPRM without change. 


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Federal Register / Vol. 89, No. 231 / Monday, December 2, 2024 / Rules and Regulations 95089 

Conclusion 

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 referenced 

above. The FAA reviewed the relevant 

data, considered the comment received, 

and determined that air safety requires 

adopting the AD as proposed. 

Accordingly, the FAA is issuing this AD 

to address the unsafe condition on these 

products. Except for minor editorial 

changes, this AD is adopted as proposed 

in the NPRM. 

Material Incorporated by Reference 

Under 1 CFR Part 51 

The FAA reviewed EASA AD 2024– 

0062, which specifies instructions for 

accomplishing the actions specified in 

the applicable TLM, including 

performing maintenance tasks, replacing 

life-limited parts, and revising the 

existing approved maintenance or 

inspection program, as applicable, by 

incorporating the limitations, tasks, and 

associated thresholds and intervals 

described in the TLM. 

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. 

Differences Between This AD and the 

MCAI 

Where EASA AD 2024–0062 specifies 

revising the approved AMP within 12 

months after the effective date of EASA 

AD 2024–0062, this AD requires 

revising the ALS of the existing 

approved aircraft maintenance or 

inspection program, as applicable, 

within 30 days after the effective date of 

this AD. 

Costs of Compliance 

The FAA estimates that this AD 

affects 28 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 

Revise the ALS ............................................... 1 work-hours × $85 per hour = $85 ............... $0 $85 $2,380 

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 has determined that 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: 

■ a. Removing Airworthiness Directive 

2023–21–08, Amendment 39–22580 (88 

FR 77889, November 14, 2023); and 

■ b. Adding the following new 

airworthiness directive: 

2024–23–04 Rolls-Royce Deutschland Ltd & 

Co KG: Amendment 39–22883; Docket 

No. FAA–2024–2014; Project Identifier 

MCAI–2024–00162–E. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective January 6, 2025. 

(b) Affected ADs 

This AD replaces AD 2023–21–08, 

Amendment 39–22580 (88 FR 77889, 

November 14, 2023). 

(c) Applicability 

This AD applies to Rolls-Royce 

Deutschland Ltd & Co KG Model Trent 1000– 

A, Trent 1000–AE, Trent 1000–C, Trent 

1000–CE, Trent 1000–D, Trent 1000–E, Trent 

1000–G, and Trent 1000–H engines. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7200, Engine (Turbine/Turboprop). 

(e) Unsafe Condition 

This AD was prompted by the 

manufacturer revising the engine Time 

Limits Manual life limits of certain critical 

rotating parts. The FAA is issuing this AD to 

prevent the failure of critical rotating parts. 

The unsafe condition, if not addressed, could 

result in failure of critical rotating parts, 

which could result in failure of one or more 

engines, loss of thrust control, and loss of the 

airplane. 

(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: Perform all required actions within the 

compliance times specified in, and in 

accordance with, European Union Aviation 

Safety Agency (EASA) AD 2024–0062, dated 

March 6, 2024 (EASA AD 2024–0062). 

(h) Exceptions to EASA AD 2024–0062 

(1) Where EASA AD 2024–0062 refers to its 

effective date, this AD requires using the 

effective date of this AD. 


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95090 Federal Register / Vol. 89, No. 231 / Monday, December 2, 2024 / Rules and Regulations 

(2) This AD does not require compliance 

with paragraphs (1), (2), (4), and (5) of EASA 

AD 2024–0062. 

(3) Where paragraph (3) of EASA AD 2024– 

0062 specifies ‘‘Within 12 months after the 

effective date of this AD, revise the approved 

AMP,’’ for this AD, replace that text with 

‘‘Within 30 days after the effective date of 

this AD, revise the airworthiness limitation 

section (ALS) of the existing approved engine 

maintenance or inspection program, as 

applicable.’’ 

(4) The initial compliance time for doing 

the tasks specified in paragraph (3) of EASA 

AD 2024–0062 is on or before the applicable 

‘‘limitations’’ and ‘‘associated thresholds’’ as 

incorporated by the requirements of 

paragraph (3) of EASA AD 2024–0062 or 

within 30 days after the effective date of this 

AD, whichever occurs later. 

(5) This AD does not adopt the ‘‘Remarks’’ 

paragraph of EASA AD 2024–0062. 

(i) Provisions for Alternative Actions and 

Intervals 

No alternative actions and associated 

thresholds and intervals, including life 

limits, are allowed for compliance with 

paragraph (g) of this AD unless they are 

approved as specified in the provisions of the 

‘‘Ref. Publications’’ section of EASA AD 

2024–0062. 

(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, AIR–520 Continued 

Operational Safety Branch, send it to the 

attention of the person identified in 

paragraph (k) 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. 

(k) Additional Information 

For more information about this AD, 

contact Barbara Caufield, Aviation Safety 

Engineer, FAA, 2200 South 216th Street, Des 

Moines, WA 98198; phone: (781) 238–7146; 

email: barbara.caufield@faa.gov. 

(l) 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) European Union Aviation Safety Agency 

(EASA) AD 2024–0062, dated March 6, 2024. 

(ii) [Reserved] 

(3) For EASA material identified in this 

AD, contact EASA, Konrad-Adenauer-Ufer 3, 

50668 Cologne, Germany; phone: +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 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. 

(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 12, 2024. 

Peter A. White, 

Deputy Director, Integrated Certificate 

Management Division, Aircraft Certification 

Service. 

[FR Doc. 2024–28094 Filed 11–29–24; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2024–1899; Project 

Identifier MCAI–2023–01169–E; Amendment 

39–22870; AD 2024–21–03] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 2023–24– 

06, which applies to certain Rolls-Royce 

Deutschland Ltd & Co KG (RRD) Model 

Trent 1000 engines. AD 2023–24–06 

required revising the airworthiness 

limitation section (ALS) of the 

operator’s existing approved engine 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive tasks and limitations and 

associated thresholds and intervals for 

life-limited parts. This AD was 

prompted by the manufacturer revising 

the time limits manual (TLM) to 

introduce new or more restrictive tasks 

and limitations and associated 

thresholds and intervals for life-limited 

parts. This AD requires revisions to the 

ALS of the operator’s existing approved 

engine maintenance or inspection 

program, as specified in a European 

Union Aviation Safety Agency (EASA) 

AD, which is incorporated by reference. 

The FAA is issuing this AD to address 

the unsafe condition on these products. 

DATES: This AD is effective January 6, 

2025. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of January 6, 2025. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2024–1899; 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 EASA material identified in this 

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

+49 221 8999 000; email: ADs@

easa.europa.eu. You may find this 

material on the EASA website at 

ad.easa.europa.eu. 

• 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. It is also available at 

regulations.gov under Docket No. FAA– 

2024–1899. 

FOR FURTHER INFORMATION CONTACT: 

Barbara Caufield, Aviation Safety 

Engineer, FAA, 2200 South 216th Street, 

Des Moines, WA 98198; phone: (781) 

238–7146; email: barbara.caufield@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 2023–24–06, 

Amendment 39–22623 (88 FR 89290, 

December 27, 2023) (AD 2023–24–06) 

for certain RRD Model Trent 1000–AE3, 

Trent 1000–CE3, Trent 1000–D3, Trent 

1000–G3, Trent 1000–H3, Trent 1000– 

J3, Trent 1000–K3, Trent 1000–L3, Trent 

1000–M3, Trent 1000–N3, Trent 1000– 

P3, Trent 1000–Q3, and Trent 1000–R3 

engines. AD 2023–24–06 required 

revising the ALS of the operator’s 

existing approved engine maintenance 

or inspection program, as applicable, to 

incorporate new or more restrictive 

tasks and limitations and associated 

thresholds and intervals for life-limited 

parts. The FAA issued AD 2023–24–06 

to prevent the failure of critical rotating 

parts. 

The NPRM published in the Federal 

Register on July 29, 2024 (89 FR 60841). 

The NPRM was prompted by EASA AD 


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