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
Federal Register / Vol. 88, No. 179 / Monday, September 18, 2023 / Proposed Rules 63889 

by EASA, which is the Technical Agent 

for the Member States of the European 

Union. EASA issued EASA AD 2020– 

0244, dated November 5, 2020 (EASA 

AD 2020–0244), to address the 

manufacturer revising the engine TLM 

life limits of certain critical rotating 

parts and updating certain maintenance 

tasks. 

AD 2021–25–03 requires operators to 

revise the ALS of their existing 

approved continuous airworthiness 

maintenance program by incorporating 

the revised tasks of the applicable TLM 

for each affected model turbofan engine, 

as specified in EASA AD 2020–0244. 

The FAA issued AD 2021–25–03 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 2021–25–03 Was 

Issued 

Since the FAA issued AD 2021–25– 

03, EASA superseded EASA AD 2020– 

0244 with EASA AD 2022–0248, dated 

December 14, 2022 (EASA AD 2022– 

0248) (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–2023–1878. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed EASA AD 2022– 

0248, 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 

2022–0248, 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.’’ 

Differences Between This Proposed AD 

and the MCAI 

Where paragraph (3) of EASA AD 

2022–0248 specifies revising the 

approved Aircraft Maintenance 

Programme within 12 months after the 

effective date of EASA AD 2022–0248, 

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 2022–0248. 

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 2022–0248 in the FAA final 

rule. This proposed AD would, 

therefore, require compliance with 

EASA AD 2022–0248 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 2022–0248. 

Service information required by the 

EASA AD for compliance will be 

available at regulations.gov under 

Docket No. FAA–2023–1878 after the 

FAA final rule is published. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 40 

engines installed on airplanes of U.S. 

registry. 

The FAA estimates the following 

costs to comply with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on 

U.S. operators 

Revise the ALS ...................... 1 work-hour × $85 per hour = $85 ......................................... $0 $85 $3,400 

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 


lotter on DSK11XQN23PROD with PROPOSALS1
63890 Federal Register / Vol. 88, No. 179 / Monday, September 18, 2023 / Proposed Rules 

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 

2021–25–03, Amendment 39–21846 (86 

FR 71135, December 15, 2021); and 

■ b. Adding the following new 

airworthiness directive: 

Rolls-Royce Deutschland Ltd & Co KG: 

Docket No. FAA–2023–1878; Project 

Identifier MCAI–2022–01582–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 2021–25–03, 

Amendment 39–21846 (86 FR 71135, 

December 15, 2021). 

(c) Applicability 

This AD applies to Rolls-Royce 

Deutschland Ltd & Co KG Model Trent 7000– 

72 and Trent 7000–72C 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 updating certain 

maintenance tasks. 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 2022–0248, dated 

December 14, 2022 (EASA AD 2022–0248). 

(h) Exceptions to EASA AD 2022–0248 

(1) Where EASA AD 2022–0248 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 2022–0248 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 2022–0248. 

(4) Where paragraph (3) of EASA AD 2022– 

0248 specifies revising the approved AMP 

within 12 months after the effective date of 

EASA AD 2022–0248, 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 2022–0248. 

(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 2022–0248. 

(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 

(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 2022–0248, dated December 14, 

2022. 

(ii) [Reserved] 

(3) For EASA AD 2022–0248, 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 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 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 7, 2023. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2023–19784 Filed 9–15–23; 8:45 am] 

BILLING CODE 4910–13–P 

FEDERAL COMMUNICATIONS 

COMMISSION 

47 CFR Parts 1, 2, 15, 25, 27, 74, 78, 

and 101 

[WT Docket No. 20–443; GN Docket No. 22– 

352; DA 23–802; FR ID 171502] 

Expanding Flexible Use of the 12.2– 

12.7 GHz Band; Expanding Use of the 

12.7–13.25 GHz Band for Mobile 

Broadband or Other Expanded Use 

AGENCY: Federal Communications 

Commission. 

ACTION: Proposed rule; denial of 

extension of reply comment deadline. 

SUMMARY: In this document, the 

Wireless Telecommunications Bureau 


lotter on DSK11XQN23PROD with PROPOSALS1