Federal Register / Vol. 88, No. 179 / Monday, September 18, 2023 / Proposed Rules 63885 

completed 1 year of current continuous 

service in the same or similar positions 

and who is either a supervisory or 

management employee or an employee 

engaged in personnel work in other than 

a purely nonconfidential clerical 

capacity, including such an employee 

who is moved involuntarily into a 

different schedule of the excepted 

service and still occupies that position 

or a similar position; 

(5) An employee in the excepted 

service who is a nonpreference eligible 

in an Executive agency as defined at 5 

U.S.C. 105, and who has completed 2 

years of current continuous service in 

the same or similar positions under 

other than a temporary appointment 

limited to 2 years or less, including such 

an employee who is moved 

involuntarily into a different schedule 

of the excepted service and still 

occupies that position or a similar 

position; 

(6) An employee with competitive 

status who occupies a position in 

Schedule B of part 213 of this chapter, 

including such an employee whose 

position is moved involuntarily into a 

different schedule of the excepted 

service and still occupies that position; 

(7) An employee who was in the 

competitive service and had competitive 

status as defined in § 212.301 of this 

chapter at the time the employee’s 

position was first listed under any 

schedule of the excepted service and 

who still occupies that position; 

(8) An employee of the Department of 

Veterans Affairs appointed under 38 

U.S.C. 7401(3), including such an 

employee who is moved involuntarily 

into a different schedule of the excepted 

service and still occupies that position 

or a similar position; and 

(9) An employee of the Government 

Publishing Office, including such an 

employee who is moved involuntarily 

into the excepted service. 

(d) * * * 

(2) An employee whose position has 

been determined to be of a confidential, 

policy-determining, policy-making, or 

policy-advocating character, as defined 

in § 210.102 of this chapter by— 

(i) The President for a position that 

the President has excepted from the 

competitive service; 

(ii) The Office of Personnel 

Management for a position that the 

Office has excepted from the 

competitive service; or 

(iii) The President or the head of an 

agency for a position excepted from the 

competitive service by statute. 

* * * * * 

[FR Doc. 2023–19806 Filed 9–15–23; 8:45 am] 

BILLING CODE 6325–39–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1881; Project 

Identifier MCAI–2023–00738–E] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede Airworthiness Directive (AD) 

2021–25–04, which applies to certain 

Rolls-Royce Deutschland Ltd & Co KG 

(RRD) Model Trent 1000 engines. AD 

2021–25–04 requires operators to revise 

the airworthiness limitations section 

(ALS) of their existing approved 

continuous airworthiness maintenance 

program by incorporating the revised 

tasks of the applicable time limits 

manual (TLM) for each affected model 

turbofan engine. Since the FAA issued 

AD 2021–25–04, the manufacturer 

revised the TLM to introduce new or 

more restrictive tasks and limitations 

and associated thresholds and intervals 

for life-limited parts, which prompted 

this proposed AD. This proposed AD 

would require 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, as specified in a 

European Union Aviation Safety Agency 

(EASA) AD, which is proposed for 

incorporation by reference (IBR). The 

FAA is proposing this AD to address the 

unsafe condition on these products. 

DATES: The FAA must receive comments 

on this NPRM by November 2, 2023. 

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–2023–1881; 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 service information that is 

identified in this NPRM, 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. It is also available at 

regulations.gov under Docket No. FAA– 

2023–1881. 

• 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. 

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: 

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 ADDRESSES. Include ‘‘Docket No. 

FAA–2023–1881; Project Identifier 

MCAI–2023–00738–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 


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63886 Federal Register / Vol. 88, No. 179 / Monday, September 18, 2023 / Proposed Rules 

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 Sungmo Cho, Aviation 

Safety Engineer, FAA, 2200 South 216th 

Street, Des Moines, WA 98198. 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 2021–25–04, 

Amendment 39–21847 (86 FR 71129, 

December 15, 2021) (AD 2021–25–04), 

for all 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 

(Trent 1000) engines. AD 2021–25–04 

was prompted by an MCAI originated by 

EASA, which is the Technical Agent for 

the Member States of the European 

Union. EASA issued EASA AD 2020– 

0243, dated November 5, 2020 (EASA 

AD 2020–0243) to address the 

manufacturer revising the engine TLM 

life limits of certain critical rotating 

parts and updating certain maintenance 

tasks. 

AD 2021–25–04 requires operators to 

revise the ALS of their existing 

approved aircraft maintenance program 

by incorporating the revised tasks of the 

applicable TLM for each affected model 

turbofan engine, as specified in EASA 

AD 2020–0243. The FAA issued AD 

2021–25–04 to prevent the failure of 

critical rotating parts, which could 

result in failure of one or more engines, 

loss of thrust control, and loss of the 

airplane. 

Actions Since AD 2021–25–04 Was 

Issued 

Since the FAA issued AD 2021–25– 

04, EASA superseded EASA AD 2020– 

0243 with EASA AD 2022–0247, dated 

December 14, 2022 (EASA AD 2022– 

0247) and then superseded EASA AD 

2022–0247 with EASA AD 2023–0115, 

dated June 7, 2023 (EASA AD 2023– 

0115) (also referred to after this as the 

MCAI). The MCAI states that the 

manufacturer published a revised 

engine TLM to introduce new or more 

restrictive tasks and limitations and 

associated thresholds and intervals for 

life-limited parts. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–1881. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed EASA AD 2023– 

0115, which specifies procedures for 

operators to revise the ALS of the 

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 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. 

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 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 require 

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, which are specified in EASA AD 

2023–0115, described previously, 

except for any differences identified as 

exceptions in the regulatory text of this 

proposed AD and as discussed under 

‘‘Differences Between this Proposed AD 

and the MCAI.’’ 

Explanation of Required Compliance 

Information 

In the FAA’s ongoing efforts to 

improve the efficiency of the AD 

process, the FAA developed a process to 

use some civil aviation authority (CAA) 

ADs as the primary source of 

information for compliance with 

requirements for corresponding FAA 

ADs. The FAA has since coordinated 

with other manufacturers and CAAs to 

use this process. As a result, the FAA 

proposes to incorporate by reference 

EASA AD 2023–0115 in the FAA final 

rule. This proposed AD would, 

therefore, require compliance with 

EASA AD 2023–0115 in its entirety 

through that incorporation, except for 

any differences identified as exceptions 

in the regulatory text of this proposed 

AD. Using common terms that are the 

same as the heading of a particular 

section in the EASA AD does not mean 

that operators need comply only with 

that section. For example, where the AD 

requirement refers to ‘‘all required 

actions within compliance times,’’ 

compliance with this AD requirement is 

not limited to the section titled 

‘‘Required Action(s) and Compliance 

Time(s)’’ in EASA AD 2023–0115. 

Service information required by the 

EASA AD for compliance will be 

available at regulations.gov under 

Docket No. FAA–2023–1881 after the 

FAA final rule is published. 

Differences Between This Proposed AD 

and the MCAI 

Where paragraph (3) of EASA AD 

2023–0115 specifies revising the 

approved Aircraft Maintenance 

Programme within 12 months after the 

effective date of EASA AD 2023–0115, 

this proposed AD would require 

revising the ALS of the existing 

approved engine maintenance or 

inspection program, as applicable, 

within 90 days after the effective date of 

this AD. 

This proposed AD would not require 

compliance with paragraphs (1), (2), (4), 

and (5) of EASA AD 2023–0115. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 2 

engines installed on airplanes of U.S. 

registry. 

The FAA estimates the following 

costs to comply with this proposed AD: 


lotter on DSK11XQN23PROD with PROPOSALS1
Federal Register / Vol. 88, No. 179 / Monday, September 18, 2023 / Proposed Rules 63887 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on 

U.S. operators 

Revise the ALS ...................... 1 work-hour × $85 per hour = $85 ......................................... $0 $85 $170 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII, 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

The FAA is issuing this rulemaking 

under the authority described in 

Subtitle VII, Part A, Subpart III, Section 

44701: General requirements. Under 

that section, Congress charges the FAA 

with promoting safe flight of civil 

aircraft in air commerce by prescribing 

regulations for practices, methods, and 

procedures the Administrator finds 

necessary for safety in air commerce. 

This regulation is within the scope of 

that authority because it addresses an 

unsafe condition that is likely to exist or 

develop on products identified in this 

rulemaking action. 

Regulatory Findings 

The FAA determined that this 

proposed AD would not have federalism 

implications under Executive Order 

13132. This proposed AD would not 

have a substantial direct effect on the 

States, on the relationship between the 

national Government and the States, or 

on the distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify 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 2021–25–04, Amendment 39–21847 

(86 FR 71129, December 15, 2021); and 

■ b. Adding the following new 

airworthiness directive: 

Rolls-Royce Deutschland Ltd & Co KG: 

Docket No. FAA–2023–1881; Project 

Identifier MCAI–2023–00738–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by November 2, 

2023. 

(b) Affected ADs 

This AD replaces AD 2021–25–04, 

Amendment 39–21847 (86 FR 71129, 

December 15, 2021). 

(c) Applicability 

This AD applies to Rolls-Royce 

Deutschland Ltd & Co KG 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. 

(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 (TLM) life limits of certain critical 

rotating parts and direct accumulation 

counting data files. 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 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 2023–0115, dated 

June 7, 2023 (EASA AD 2023–0115). 

(h) Exceptions to EASA AD 2023–0115 

(1) Where EASA AD 2023–0115 defines the 

AMP as the approved Aircraft Maintenance 

Programme containing the tasks on the basis 

of which the scheduled maintenance is 

conducted to ensure the continuing 

airworthiness of each operated engine, this 

AD defines the AMP as the aircraft 

maintenance program containing the tasks on 

the basis of which the scheduled 

maintenance is conducted to ensure the 

continuing airworthiness of each operated 

airplane. 

(2) Where EASA AD 2023–0115 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(3) This AD does not require compliance 

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

AD 2023–0115. 

(4) Where paragraph (3) of EASA AD 2023– 

0115 specifies revising the approved AMP 

within 12 months after the effective date of 

EASA AD 2023–0115, this AD requires 

revising the airworthiness limitations section 

of the existing approved engine maintenance 

or inspection program, as applicable, within 

90 days after the effective date of this AD. 

(5) This AD does not adopt the Remarks 

paragraph of EASA AD 2023–0115. 

(i) Provisions for Alternative Actions and 

Intervals 

After performing the actions required by 

paragraph (g) of this AD, no alternative 

actions and associated thresholds and 

intervals, including life limits, are allowed 

unless they are approved as specified in the 

provisions of the ‘‘Ref. Publications’’ section 

of EASA AD 2023–0115. 

(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. 


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63888 Federal Register / Vol. 88, No. 179 / Monday, September 18, 2023 / Proposed Rules 

(l) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) 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 2023–0115, dated June 7, 2023. 

(ii) [Reserved] 

(3) For EASA AD 2023–0115, 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 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 service information 

that is incorporated by reference at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

email: fr.inspection@nara.gov, or go to: 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued on September 8, 2023. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2023–19866 Filed 9–15–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1878; Project 

Identifier MCAI–2022–01582–E] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede Airworthiness Directive (AD) 

2021–25–03, which applies to all RollsRoyce Deutschland Ltd & Co KG (RRD) 

Model Trent 7000–72 and Trent 7000– 

72C engines. AD 2021–25–03 requires 

operators to revise the airworthiness 

limitation section (ALS) of their existing 

approved continuous airworthiness 

maintenance program by incorporating 

the revised tasks of the applicable time 

limits manual (TLM) for each affected 

model turbofan engine. Since the FAA 

issued AD 2021–25–03, the 

manufacturer again revised the TLM to 

introduce new or more restrictive tasks 

and limitations and associated 

thresholds and intervals for life-limited 

parts, which prompted this proposed 

AD. This proposed AD would require 

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, as specified in a European Union 

Aviation Safety Agency (EASA) AD, 

which is proposed for incorporation by 

reference (IBR). The FAA is proposing 

this AD to address the unsafe condition 

on these products. 

DATES: The FAA must receive comments 

on this NPRM by November 2, 2023. 

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–2023–1878; 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 service information identified 

in this NPRM, 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. It is also available at 

regulations.gov under Docket No. FAA– 

2023–1878. 

• 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. 

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: 

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 ADDRESSES. Include ‘‘Docket No. 

FAA–2023–1878; Project Identifier 

MCAI–2022–01582–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 Sungmo Cho, Aviation 

Safety Engineer, FAA, 2200 South 216th 

Street, Des Moines, WA 98198. 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 2021–25–03, 

Amendment 39–21846 (86 FR 71135, 

December 15, 2021) (AD 2021–25–03), 

for all RRD Model Trent 7000–72 and 

Trent 7000–72C engines. AD 2021–25– 

03 was prompted by an MCAI originated 


lotter on DSK11XQN23PROD with PROPOSALS1