Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG, 37109-37111 [2024-09555]

Download as PDF Federal Register / Vol. 89, No. 88 / Monday, May 6, 2024 / Rules and Regulations 37109 TABLE 1 TO PARAGRAPH (c)(3)—Continued Data element Explanation Start leg amount ........................................ The amount of cash transferred to the cash borrower on the open leg of the transaction at the inception of the transaction. The amount of cash to be transferred by the cash borrower on the end date of the transaction. The amount of cash to be transferred by the cash borrower, inclusive of principal, accrued interest and other adjustments, as of the end of the business day. The currency which is used in the Start leg amount field. The rate of interest paid by the cash borrower on the transaction, expressed as an annual percentage rate on an actual/360-day basis. The name of the benchmark interest rate upon which the transaction is based. The time period, in calendar days, describing the frequency of the floating rate resets. The contractual spread over (or below) the benchmark rate referenced in the repurchase agreement. The identifier type for the securities transferred between cash borrower and cash lender. The identifier of securities transferred between the cash borrower and the cash lender in the repo. The number of units (e.g., shares, bonds, bills, notes) transferred to the cash lender as of the end of the business day. The market value of the transferred securities as of the end of the business day, inclusive of accrued interest. The market value of the transferred securities at the inception of the transaction, inclusive of accrued interest. The currency used in the Securities value and Securities value at inception fields. The difference between the market value of the transferred securities and the purchase price paid at the inception of the transaction. The covered reporter may characterize any detail of the transaction with special instructions, notes, or comments. Close leg amount ....................................... Current cash amount ................................. Start leg currency ...................................... Rate ........................................................... Floating rate benchmark ............................ Floating rate reset frequency ..................... Spread ....................................................... Securities identifier type ............................ Security identifier ....................................... Securities quantity ..................................... Securities value ......................................... Securities value at inception ...................... Securities value currency .......................... Haircut ........................................................ ddrumheller on DSK120RN23PROD with RULES1 Special instructions, notes, or comments .. (d) Reporting process. Covered reporters shall submit the required data for each business day by 11 a.m. Eastern Time on the following business day. The Office may either collect the data itself or designate a collection agent for that purpose. (e) Compliance date. (1) Any financial company that meets the criteria set forth in paragraph (b)(2)(i) of this section as of the effective date of this section shall comply with the reporting requirements pursuant to this section 150 days after the effective date of this section. Any such covered reporter’s first submission shall be submitted on the first business day after such compliance date. (2) Any financial company that meets the criteria set forth in paragraph (b)(2)(ii) of this section as of the effective date of this section shall comply with the reporting requirements pursuant to this section 270 days after the effective date of this section. Any such covered reporter’s first submission shall be submitted on the first business day after such compliance date. (3) Any financial company not described in subparagraph (e)(1) or (2) of this section that meets the criteria set forth in paragraph (b)(2)(i) of this section after the effective date of this section shall comply with the reporting requirements pursuant to this section 150 days after the last day of the calendar quarter in which such financial company becomes a covered reporter. (4) Any financial company not described in subparagraph (e)(1) or (2) of this section that meets the criteria set VerDate Sep<11>2014 16:54 May 03, 2024 Jkt 262001 forth in paragraph (b)(2)(ii) of this section after the effective date of this section shall comply with the reporting requirements pursuant to this section 270 days after the last day of the calendar quarter in which such financial company becomes a covered reporter. James D. Martin, Acting Director. [FR Doc. 2024–08999 Filed 5–3–24; 8:45 am] BILLING CODE 4810–AK–P–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2024–0036; Project Identifier MCAI–2023–00731–E; Amendment 39–22739; AD 2024–08–06] RIN 2120–AA64 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for all Rolls-Royce Deutschland Ltd & Co KG (RRD) Model Trent 1000–A, Trent 1000– A2, Trent 1000–AE, Trent 1000–AE2, Trent 1000–C, Trent 1000–C2, Trent 1000–CE, Trent 1000–CE2, Trent 1000– D, Trent 1000–D2, Trent 1000–E, Trent 1000–E2, Trent 1000–G, Trent 1000–G2, SUMMARY: PO 00000 Frm 00049 Fmt 4700 Sfmt 4700 Trent 1000–H, Trent 1000–H2, Trent 1000–J2, Trent 1000–K2, and Trent 1000–L2 engines. This AD was prompted by reports of wear in the combining spill valve (CSV) assembly of certain hydro-mechanical units (HMUs). This AD requires removing certain HMUs from service and replacing with a serviceable part. This AD also prohibits the installation of certain HMUs unless the HMU is a serviceable part or the CSV assembly has been replaced, 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 June 10, 2024. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of June 10, 2024. ADDRESSES: AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–0036; 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. E:\FR\FM\06MYR1.SGM 06MYR1 37110 Federal Register / Vol. 89, No. 88 / Monday, May 6, 2024 / Rules and Regulations Material Incorporated by Reference: • For EASA service information, contact EASA, Konrad-Adenauer-Ufer 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 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–2024–0036. FOR FURTHER INFORMATION CONTACT: Sungmo Cho, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238– 7241; email: sungmo.d.cho@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 all RRD Model Trent 1000–A, Trent 1000–A2, Trent 1000–AE, Trent 1000–AE2, Trent 1000–C, Trent 1000– C2, Trent 1000–CE, Trent 1000–CE2, Trent 1000–D, Trent 1000–D2, Trent 1000–E, Trent 1000–E2, Trent 1000–G, Trent 1000–G2, Trent 1000–H, Trent 1000–H2, Trent 1000–J2, Trent 1000– K2, and Trent 1000–L2 engines. The NPRM published in the Federal Register on January 24, 2024 (89 FR 4582). The NPRM was prompted by EASA AD 2023–0113, dated June 1, 2023 (EASA AD 2023–0113) (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 occurrences have been reported of finding wear in the CSV assembly of certain HMUs. This wear can reduce the fuel flow output when the engine is operated at high power conditions and lead to thrust reduction. To address this unsafe condition, the manufacturer published service information that specifies procedures to remove certain HMUs from service and replace with a serviceable part. The MCAI also specifies an implementation schedule, based on engine flight-hour (EFH) limits, for replacement of each affected part with a serviceable part and prohibits installation or reinstallation of affected HMUs that have exceeded the allowable EFH limit unless the HMU is a serviceable part or the CSV assembly has been replaced. In the NPRM, the FAA proposed to require removing certain HMUs from service and replacing with a serviceable part. The NPRM also proposed to prohibit installation of certain HMUs unless the HMU is a serviceable part or the CSV assembly has been replaced. The FAA is issuing this AD to address the unsafe condition on these products. You may examine the MCAI in the AD docket at regulations.gov under Docket No. FAA–2024–0036. Discussion of Final Airworthiness Directive 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. Related Service Information Under 1 CFR Part 51 The FAA reviewed EASA AD 2023– 0113, which specifies procedures for removing certain part-numbered HMUs from service and replacing with a serviceable part. The MCAI also specifies prohibiting installation or reinstallation of an affected HMU on any engine unless the HMU is a serviceable part. This service information is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in ADDRESSES. Comments Costs of Compliance The FAA received one comment from Boeing which supported the NPRM without change. The FAA estimates that this AD affects 28 engines installed on airplanes, of U.S. registry. ddrumheller on DSK120RN23PROD with RULES1 ESTIMATED COSTS Action Labor cost Parts cost Cost per product Cost on U.S. operators Replace the HMU ........................................... 7 work-hours × $85 per hour = $595 ............. $552,000 $552,595 $15,472,660 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 VerDate Sep<11>2014 16:54 May 03, 2024 Jkt 262001 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 PO 00000 Frm 00050 Fmt 4700 Sfmt 4700 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. E:\FR\FM\06MYR1.SGM 06MYR1 Federal Register / Vol. 89, No. 88 / Monday, May 6, 2024 / Rules and Regulations 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: ■ 2024–08–06 Rolls-Royce Deutschland Ltd & Co KG: Amendment 39–22739; Docket No. FAA–2024–0036; Project Identifier MCAI–2023–00731–E. (a) Effective Date This airworthiness directive (AD) is effective June 10, 2024. (b) Affected ADs None. (c) Applicability This AD applies to Rolls-Royce Deutschland Ltd & Co KG Model Trent 1000– A, Trent 1000–A2, Trent 1000–AE, Trent 1000–AE2, Trent 1000–C, Trent 1000–C2, Trent 1000–CE, Trent 1000–CE2, Trent 1000– D, Trent 1000–D2, Trent 1000–E, Trent 1000– E2, Trent 1000–G, Trent 1000–G2, Trent 1000–H, Trent 1000–H2, Trent 1000–J2, Trent 1000–K2, and Trent 1000–L2 engines. (d) Subject Joint Aircraft System Component (JASC) Code 7300, Engine Fuel and Control. (e) Unsafe Condition This AD was prompted by reports of wear in the combining spill valve (CSV) assembly of certain hydro-mechanical units (HMUs). The FAA is issuing this AD to prevent thrust reduction. The unsafe condition, if not addressed, could result in reduced control of the airplane. ddrumheller on DSK120RN23PROD with RULES1 (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 2023–0113, dated June 1, 2023 (EASA AD 2023–0113). (h) Exceptions to EASA AD 2023–0113 (1) Where EASA AD 2023–0113 refers to its effective date, this AD requires using the effective date of this AD. VerDate Sep<11>2014 16:54 May 03, 2024 Jkt 262001 (2) Where Table 1 of EASA AD 2023–0113 specifies ‘‘15 June 2023’’, replace that text with ‘‘As of the effective date of this AD.’’ (3) Where Table 1 of EASA AD 2023–0113 specifies ‘‘01 January 2025’’, replace that text with ‘‘Within 4 months after the effective date of this AD or January 1, 2025, whichever occurs later.’’ (4) Where the service information referenced in EASA AD 2023–0013 specifies to discard certain parts, this AD requires those parts to be removed from service. (5) This AD does not adopt the Remarks paragraph of EASA AD 2023–0113. (i) Definitions For the purposes of this AD, the ‘‘implementation date’’ is defined as the date that the applicable engine flight hour limit takes effect. (j) Alternative Methods of Compliance (AMOCs) (1) The Manager, AIR–520 Continued Operational Safety Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or local Flight Standards District Office, as appropriate. If sending information directly to the manager of the AIR–520 Continued Operational Safety Branch, send it to the attention of the person identified in paragraph (k) of this AD and email to: ANEAD-AMOC@faa.gov. (2) Before using any approved AMOC, notify your appropriate principal inspector, or lacking a principal inspector, the manager of the local flight standards district office/ certificate holding district office. (k) Additional Information For more information about this AD, contact Sungmo Cho, Aviation Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238–7241; email: sungmo.d.cho@faa.gov. (l) 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 the AD specifies otherwise. (i) European Union Aviation Safety Agency (EASA) AD 2023–0113, dated June 1, 2023. (ii) [Reserved] (3) For EASA AD 2023–0113, 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 material 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, 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, PO 00000 Frm 00051 Fmt 4700 Sfmt 4700 37111 visit www.archives.gov/federal-register/cfr/ ibr-locationsoremailfr.inspection@nara.gov. Issued on April 17, 2024. Victor Wicklund, Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2024–09555 Filed 5–3–24; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2024–0030; Project Identifier AD–2023–01066–E; Amendment 39–22722; AD 2024–07–02] RIN 2120–AA64 Airworthiness Directives; CFM International, S.A. Engines Federal Aviation Administration (FAA), DOT. ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for CFM International, S.A. (CFM) Model LEAP– 1A23, LEAP–1A24, LEAP–1A24E1, LEAP–1A26, LEAP–1A26CJ, LEAP– 1A26E1, LEAP–1A29, LEAP–1A29CJ, LEAP–1A30, LEAP–1A32, LEAP–1A33, LEAP–1A33B2, and LEAP–1A35A engines. This AD was prompted by detection of melt-related freckles in the billet, which may reduce the life of certain high-pressure turbine (HPT) rotor interstage seals. This AD requires removing the affected HPT rotor interstage seals from service and replacing 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 June 10, 2024. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of June 10, 2024. ADDRESSES: AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA–2024–0030; 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 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: SUMMARY: E:\FR\FM\06MYR1.SGM 06MYR1

Agencies

[Federal Register Volume 89, Number 88 (Monday, May 6, 2024)]
[Rules and Regulations]
[Pages 37109-37111]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-09555]


=======================================================================
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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2024-0036; Project Identifier MCAI-2023-00731-E; 
Amendment 39-22739; AD 2024-08-06]
RIN 2120-AA64


Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for all 
Rolls-Royce Deutschland Ltd & Co KG (RRD) Model Trent 1000-A, Trent 
1000-A2, Trent 1000-AE, Trent 1000-AE2, Trent 1000-C, Trent 1000-C2, 
Trent 1000-CE, Trent 1000-CE2, Trent 1000-D, Trent 1000-D2, Trent 1000-
E, Trent 1000-E2, Trent 1000-G, Trent 1000-G2, Trent 1000-H, Trent 
1000-H2, Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 engines. This 
AD was prompted by reports of wear in the combining spill valve (CSV) 
assembly of certain hydro-mechanical units (HMUs). This AD requires 
removing certain HMUs from service and replacing with a serviceable 
part. This AD also prohibits the installation of certain HMUs unless 
the HMU is a serviceable part or the CSV assembly has been replaced, 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 June 10, 2024.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of June 10, 
2024.

ADDRESSES: 
    AD Docket: You may examine the AD docket at regulations.gov under 
Docket No. FAA-2024-0036; 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.

[[Page 37110]]

    Material Incorporated by Reference:
     For EASA service information, contact EASA, Konrad-
Adenauer-Ufer 3, 50668 Cologne, Germany; phone: +49 221 8999 000; 
email: [email protected]. You may find this material on the EASA 
website at ad.easa.europa.eu.
     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-2024-0036.

FOR FURTHER INFORMATION CONTACT: Sungmo Cho, Aviation Safety Engineer, 
FAA, 2200 South 216th Street, Des Moines, WA 98198; phone: (781) 238-
7241; email: [email protected].

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 all RRD Model Trent 
1000-A, Trent 1000-A2, Trent 1000-AE, Trent 1000-AE2, Trent 1000-C, 
Trent 1000-C2, Trent 1000-CE, Trent 1000-CE2, Trent 1000-D, Trent 1000-
D2, Trent 1000-E, Trent 1000-E2, Trent 1000-G, Trent 1000-G2, Trent 
1000-H, Trent 1000-H2, Trent 1000-J2, Trent 1000-K2, and Trent 1000-L2 
engines. The NPRM published in the Federal Register on January 24, 2024 
(89 FR 4582). The NPRM was prompted by EASA AD 2023-0113, dated June 1, 
2023 (EASA AD 2023-0113) (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 occurrences have been reported of 
finding wear in the CSV assembly of certain HMUs. This wear can reduce 
the fuel flow output when the engine is operated at high power 
conditions and lead to thrust reduction. To address this unsafe 
condition, the manufacturer published service information that 
specifies procedures to remove certain HMUs from service and replace 
with a serviceable part. The MCAI also specifies an implementation 
schedule, based on engine flight-hour (EFH) limits, for replacement of 
each affected part with a serviceable part and prohibits installation 
or reinstallation of affected HMUs that have exceeded the allowable EFH 
limit unless the HMU is a serviceable part or the CSV assembly has been 
replaced.
    In the NPRM, the FAA proposed to require removing certain HMUs from 
service and replacing with a serviceable part. The NPRM also proposed 
to prohibit installation of certain HMUs unless the HMU is a 
serviceable part or the CSV assembly has been replaced. The FAA is 
issuing this AD to address the unsafe condition on these products.
    You may examine the MCAI in the AD docket at regulations.gov under 
Docket No. FAA-2024-0036.

Discussion of Final Airworthiness Directive

Comments

    The FAA received one comment from Boeing which supported the NPRM 
without change.

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.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed EASA AD 2023-0113, which specifies procedures for 
removing certain part-numbered HMUs from service and replacing with a 
serviceable part. The MCAI also specifies prohibiting installation or 
reinstallation of an affected HMU on any engine unless the HMU is a 
serviceable part.
    This service information is reasonably available because the 
interested parties have access to it through their normal course of 
business or by the means identified in ADDRESSES.

Costs of Compliance

    The FAA estimates that this AD affects 28 engines installed on 
airplanes, of U.S. registry.

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
               Action                        Labor cost           Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
Replace the HMU.....................  7 work-hours x $85 per         $552,000         $552,595      $15,472,660
                                       hour = $595.
----------------------------------------------------------------------------------------------------------------

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.

[[Page 37111]]

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

0
1. The authority citation for part 39 continues to read as follows:

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


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive:

2024-08-06 Rolls-Royce Deutschland Ltd & Co KG: Amendment 39-22739; 
Docket No. FAA-2024-0036; Project Identifier MCAI-2023-00731-E.

(a) Effective Date

    This airworthiness directive (AD) is effective June 10, 2024.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Rolls-Royce Deutschland Ltd & Co KG Model 
Trent 1000-A, Trent 1000-A2, Trent 1000-AE, Trent 1000-AE2, Trent 
1000-C, Trent 1000-C2, Trent 1000-CE, Trent 1000-CE2, Trent 1000-D, 
Trent 1000-D2, Trent 1000-E, Trent 1000-E2, Trent 1000-G, Trent 
1000-G2, Trent 1000-H, Trent 1000-H2, Trent 1000-J2, Trent 1000-K2, 
and Trent 1000-L2 engines.

(d) Subject

    Joint Aircraft System Component (JASC) Code 7300, Engine Fuel 
and Control.

(e) Unsafe Condition

    This AD was prompted by reports of wear in the combining spill 
valve (CSV) assembly of certain hydro-mechanical units (HMUs). The 
FAA is issuing this AD to prevent thrust reduction. The unsafe 
condition, if not addressed, could result in reduced control 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 
2023-0113, dated June 1, 2023 (EASA AD 2023-0113).

(h) Exceptions to EASA AD 2023-0113

    (1) Where EASA AD 2023-0113 refers to its effective date, this 
AD requires using the effective date of this AD.
    (2) Where Table 1 of EASA AD 2023-0113 specifies ``15 June 
2023'', replace that text with ``As of the effective date of this 
AD.''
    (3) Where Table 1 of EASA AD 2023-0113 specifies ``01 January 
2025'', replace that text with ``Within 4 months after the effective 
date of this AD or January 1, 2025, whichever occurs later.''
    (4) Where the service information referenced in EASA AD 2023-
0013 specifies to discard certain parts, this AD requires those 
parts to be removed from service.
    (5) This AD does not adopt the Remarks paragraph of EASA AD 
2023-0113.

(i) Definitions

    For the purposes of this AD, the ``implementation date'' is 
defined as the date that the applicable engine flight hour limit 
takes effect.

(j) Alternative Methods of Compliance (AMOCs)

    (1) The Manager, AIR-520 Continued Operational Safety Branch, 
FAA, has the authority to approve AMOCs for this AD, if requested 
using the procedures found in 14 CFR 39.19. In accordance with 14 
CFR 39.19, send your request to your principal inspector or local 
Flight Standards District Office, as appropriate. If sending 
information directly to the manager of the AIR-520 Continued 
Operational Safety Branch, send it to the attention of the person 
identified in paragraph (k) of this AD and email to: [email protected].
    (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 Sungmo Cho, Aviation 
Safety Engineer, FAA, 2200 South 216th Street, Des Moines, WA 98198; 
phone: (781) 238-7241; email: [email protected].

(l) 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 the AD specifies otherwise.
    (i) European Union Aviation Safety Agency (EASA) AD 2023-0113, 
dated June 1, 2023.
    (ii) [Reserved]
    (3) For EASA AD 2023-0113, contact EASA, Konrad-Adenauer-Ufer 3, 
50668 Cologne, Germany; phone: +49 221 8999 000; email: 
[email protected]; website: easa.europa.eu. You may find this 
material 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, 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/[email protected]">www.archives.gov/federal-register/cfr/[email protected].

    Issued on April 17, 2024.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft 
Certification Service.
[FR Doc. 2024-09555 Filed 5-3-24; 8:45 am]
BILLING CODE 4910-13-P
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