83492 Federal Register / Vol. 88, No. 229 / Thursday, November 30, 2023 / Rules and Regulations 

that are not subject to § 1240.32(c), the 

risk weight may not be less than 100 

percent. 

* * * * * 

■ 14. Effective April 1, 2024, amend 

§ 1240.400 by revising paragraph (c)(1) 

and removing paragraph (d). 

The revision reads as follows: 

§ 1240.400 Stability capital buffer. 

* * * * * 

(c) * * * 

(1) Increase in stability capital buffer. 

An increase in the stability capital 

buffer of an Enterprise under this 

section will take effect (i.e., be 

incorporated into the maximum payout 

ratio under table 1 to paragraph (b)(5) in 

§ 1240.11) on January 1 of the year that 

is one full calendar year after the 

increased stability capital buffer was 

calculated, provided that where a 

stability capital buffer under paragraph 

(c)(2) of this section is calculated to be 

a decrease in the stability capital buffer 

from the previously calculated 

scheduled increase applicable on the 

same January 1, the decreased stability 

capital buffer under paragraph (c)(2) 

shall take effect. 

* * * * * 

Sandra L. Thompson, 

Director, Federal Housing Finance Agency. 

[FR Doc. 2023–26078 Filed 11–29–23; 8:45 am] 

BILLING CODE 8070–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1888; Project 

Identifier MCAI–2023–00298–E; Amendment 

39–22615; AD 2023–23–13] 

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 adopting a new 

airworthiness directive (AD) for all 

Rolls-Royce Deutschland Ltd & Co KG 

(RRD) Model RB211–Trent 800 engines. 

This AD is prompted by reports of 

cracks on certain intermediate-pressure 

compressor (IPC) rotor shaft balance 

lands. This AD requires initial and 

repetitive on-wing or in-shop borescope 

inspections (BSIs) of certain IPC rotor 

shaft balance lands for cracks, dents, 

and nicks, and replacement of the IPC 

rotor shaft if necessary, and would 

prohibit the installation of a certain IPC 

rotor shaft on any engine, as specified 

in a European Union Aviation Safety 

Agency (EASA) AD, which is 

incorporated by reference (IBR). The 

FAA is issuing this AD to address the 

unsafe condition on these products. 

DATES: This AD is effective January 4, 

2024. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of January 4, 2024. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1888; or in person at 

Docket Operations between 9 a.m. and 

5 p.m., Monday through Friday, except 

Federal holidays. The AD docket 

contains this final rule, the mandatory 

continuing airworthiness information 

(MCAI), any comments received, and 

other information. The address for 

Docket Operations is U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590. 

Material Incorporated by Reference: 

• For service information identified 

in this final rule, contact EASA, KonradAdenauer-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. 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–2023–1888. 

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 RB211–Trent 

800 engines. The NPRM published in 

the Federal Register on September 15, 

2023 (88 FR 63539); corrected on 

September 27, 2023 (88 FR 66314). The 

NPRM was prompted by EASA AD 

2023–0040, dated February 16, 2023 

(EASA AD 2023–0040) (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 cracking on the IPC 

rotor shaft balance land has been 

historically observed on RRD Model 

RB211–Trent 800 engines. To address 

this unsafe condition, the manufacturer 

developed a modification, which 

introduced a revised balancing method 

that removed the original balancing 

weights from the IPC rotor shaft, and 

published service information to 

provide instructions for in-service 

modification. In addition, the 

manufacturer published service 

information to provide instructions for 

in-shop eddy current (EC) inspection of 

the IPC rotor shaft balance land. 

Consequently, EASA issued EASA AD 

2014–0152, dated June 20, 2014; 

corrected June 25, 2014; revised March 

2, 2018 (EASA AD 2014–0152R1). 

Since EASA issued EASA AD 2014– 

0152R1, the manufacturer determined 

that certain RB211–Trent 800 engines 

were not inspected during engine 

refurbishment. The manufacturer then 

identified the IPC rotor shaft balance 

lands that were not inspected and 

published service information that 

describes procedures to perform a BSI of 

the IPC rotor shaft balance land until the 

in-shop EC inspection is accomplished. 

To address this, EASA issued the MCAI. 

In the NPRM, the FAA proposed to 

require initial and repetitive on-wing or 

in-shop BSIs of certain IPC rotor shaft 

balance lands for cracks, dents, and 

nicks, and replacement of the IPC rotor 

shaft if necessary, and proposed to 

prohibit the installation of a certain IPC 

rotor shaft on any engine. 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–2023–1888. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received a comment from 

The Boeing Company (Boeing). Boeing 

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 


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Federal Register / Vol. 88, No. 229 / Thursday, November 30, 2023 / Rules and Regulations 83493 

adopting the AD as proposed. 

Accordingly, the FAA is issuing this AD 

to address the unsafe condition on these 

products. Except for minor editorial, 

this AD is adopted as proposed in the 

NPRM. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed EASA AD 2023– 

0040, which specifies procedures for 

performing initial and repetitive onwing or in-shop BSIs of the IPC rotor 

shaft balance land for cracks, dents, and 

nicks, and replacing the IPC rotor shaft 

if necessary. The MCAI also specifies 

prohibiting the installation of a certain 

IPC rotor shaft on any engine and that 

accomplishing an in-shop EC inspection 

of the IPC rotor shaft balance land or 

replacing the IPC rotor shaft constitutes 

as terminating action for the repetitive 

BSIs. 

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 194 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 

BSI of IPC rotor shaft balance land ................ 4.5 work-hours × $85 per hour = $382.50 ..... $0 $382.50 $74,205 

The FAA estimates the following 

costs to do any necessary replacements 

that would be required based on the 

results of the inspection. The agency has 

no way of determining the number of 

aircraft that might need these 

replacements: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Replace IPC rotor shaft ................................................ 50 work-hours × $85 per hour = $4,250 ...................... $2,123,908 $2,128,158 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII: 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

The FAA is issuing this rulemaking 

under the authority described in 

Subtitle VII, Part A, Subpart III, Section 

44701: General requirements. Under 

that section, Congress charges the FAA 

with promoting safe flight of civil 

aircraft in air commerce by prescribing 

regulations for practices, methods, and 

procedures the Administrator finds 

necessary for safety in air commerce. 

This regulation is within the scope of 

that authority because it addresses an 

unsafe condition that is likely to exist or 

develop on products identified in this 

rulemaking action. 

Regulatory Findings 

This AD will not have federalism 

implications under Executive Order 

13132. This AD will not have a 

substantial direct effect on the States, on 

the relationship between the national 

government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Will not affect intrastate aviation 

in Alaska, and 

(3) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 14 CFR part 39 as 

follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

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

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive: 

2023–23–13 Rolls-Royce Deutschland Ltd & 

Co KG: Amendment 39–22615; Docket 

No. FAA–2023–1888; Project Identifier 

MCAI–2023–00298–E. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective January 4, 2024. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Rolls-Royce 

Deutschland Ltd & Co KG (RRD) Model 

RB211–Trent 875–17, RB211–Trent 877–17, 

RB211–Trent 884–17, RB211–Trent 884B–17, 

RB211–Trent 892–17, RB211–Trent 892B–17, 

and RB211–Trent 895–17 engines. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7230, Turbine Engine Compressor 

Section. 

(e) Unsafe Condition 

This AD was prompted by reports of cracks 

on the intermediate-pressure compressor 

(IPC) rotor shaft balance land. The FAA is 

issuing this AD to detect cracks on the IPC 

rotor shaft balance land. The unsafe 

condition, if not addressed, could lead to IPC 

rotor shaft failure and consequent 

uncontained high-energy debris, resulting in 

damage to the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 


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83494 Federal Register / Vol. 88, No. 229 / Thursday, November 30, 2023 / Rules and Regulations 

(g) Required Actions 

Except as specified in paragraphs (h) and 

(i) 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– 

0040, dated February 16, 2023 (EASA AD 

2023–0040). 

(h) Exceptions to EASA AD 2023–0040 

(1) Where EASA AD 2023–0040 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(2) This AD does not adopt the Remarks 

paragraph of EASA AD 2023–0040. 

(3) Where the service information 

referenced in EASA AD 2023–0040 specifies 

to use certain tooling, equivalent tooling may 

be used. 

(i) No Reporting Requirement 

Although the service information 

referenced in EASA AD 2023–0040 specifies 

to notify the manufacturer or supply pictures 

to the manufacturer of any cracks, dents, or 

nicks, this AD does not include that 

requirement. 

(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 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 2023–0040, dated February 16, 

2023. 

(ii) [Reserved] 

(3) For service information 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. 

(4) You may view this service information 

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 November 20, 2023. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2023–26302 Filed 11–29–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–2228; Project 

Identifier AD–2023–01095–T; Amendment 

39–22616; AD 2023–23–14] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all The 

Boeing Company Model 747 airplanes. 

This AD was prompted by reports of 

latent failures of the lightning protection 

features for the engine fuel feed system. 

This AD requires an inspection for 

damage and a measurement of the 

electrical bonding resistance of the outtank fuel feed tube bonding jumper in 

the strut for each of the four engines, a 

measurement of the electrical bonding 

resistance of the forward side of the 

front spar bulkhead fitting adapter for 

each of the four engines, and applicable 

related investigative and corrective 

actions. The FAA is issuing this AD to 

address the unsafe condition on these 

products. 

DATES: This AD is effective December 

15, 2023. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of December 15, 2023. 

The FAA must receive comments on 

this AD by January 16, 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 by searching 

for and locating Docket No. FAA–2023– 

2228; or in person at Docket Operations 

between 9 a.m. and 5 p.m., Monday 

through Friday, except Federal holidays. 

The AD docket contains this final rule, 

any comments received, and other 

information. The street address for 

Docket Operations is listed above. 

Material Incorporated by Reference: 

• For Boeing material identified in 

this final rule, 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. 

• You may view this referenced 

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. It is also available at 

regulations.gov by searching for and 

locating Docket No. FAA–2023–2228. 

FOR FURTHER INFORMATION CONTACT: 

Samuel Dorsey, Aviation Safety 

Engineer, FAA, 2200 South 216th St., 

Des Moines, WA 98198; phone: 206– 

231–3415; email: Samuel.j.dorsey@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

The FAA invites you to send any 

written data, views, or arguments about 

this final rule. Send your comments to 

an address listed under ADDRESSES. 

Include Docket No. FAA–2023–2228 

and Project Identifier AD–2023–01095– 

T at the beginning of your comments. 

The most helpful comments reference a 

specific portion of the final rule, explain 

the reason for any recommended 

change, and include supporting data. 

The FAA will consider all comments 

received by the closing date and may 

amend this final rule because of those 

comments. 

Except for Confidential Business 

Information (CBI) as described in the 

following paragraph, and other 


khammond on DSKJM1Z7X2PROD with RULES