77918 Federal Register / Vol. 88, No. 218 / Tuesday, November 14, 2023 / Proposed Rules 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–2149; Project 

Identifier MCAI–2023–00136–E] 

RIN 2120–AA64 

Airworthiness Directives; GE Aviation 

Czech s.r.o. (Type Certificate 

Previously Held by WALTER Engines 

a.s., Walter a.s., and MOTORLET a.s.) 

Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to 

supersede Airworthiness Directive (AD) 

2022–13–16, which applies to all GE 

Aviation Czech s.r.o. (GEAC) (type 

certificate previously held by WALTER 

Engines a.s., Walter a.s., and 

MOTORLET a.s.) Model M601D–11 

engines; and AD 2022–14–12, which 

applies to certain GEAC Model M601D– 

11, M601E–11, M601E–11A, M601E– 

11AS, M601E–11S, and M601F engines. 

AD 2022–13–16 requires revising the 

airworthiness limitations section (ALS) 

of the existing engine maintenance 

manual (EMM) to incorporate a visual 

inspection of the centrifugal compressor 

case for cracks. AD 2022–14–12 requires 

replacing the propeller shaft for Model 

M601F engines. AD 2022–14–12 also 

requires calculating the accumulated 

life of the propeller shaft and replacing 

the propeller shaft, if necessary, for 

model M601D–11, M601E–11, M601E– 

11A, M601E–11AS, and M601E–11S 

engines. Since the FAA issued AD 

2022–13–16 and AD 2022–14–12, the 

manufacturer revised the ALS of the 

existing EMM to introduce new and 

more restrictive tasks and limitations, 

expand the applicability to all Model 

M601 engines, and incorporate certain 

requirements addressed by AD 2021– 

13–07 and AD 2023–01–10, which 

prompted this proposed AD. This 

proposed AD would require revising the 

ALS of the existing EMM and the 

operator’s existing approved engine 

maintenance or inspection program, as 

applicable, to incorporate new and more 

restrictive tasks and limitations, 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 December 29, 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–2023–2149; 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– 

2023–2149. 

• 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: 

Barbara Caufield, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; phone: 

(781) 238–7146; email: 

barbara.caufield@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–2023–2149; Project Identifier 

MCAI–2023–00136–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 Barbara Caufield, 

Aviation Safety Engineer, FAA, 1600 

Stewart Avenue, Suite 410, Westbury, 

NY 11590. 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 2021–13–07, 

Amendment 39–21612 (86 FR 31601, 

June 15, 2021) (AD 2021–13–07) for all 

GEAC Model M601D–11, M601E–11, 

M601E–11A, M601E–11AS, M601E– 

11S, and M601F engines. AD 2021–13– 

07 was prompted by an MCAI originated 

by EASA. EASA issued EASA 

Emergency AD 2021–0125–E, dated May 

7, 2021 (EASA Emergency AD 2021– 

0125–E) to correct an unsafe condition 

identified as the manufacturer finding 

errors in the ALS of the existing EMM, 

including errors in the formula to 

determine the consumed equivalent 

flight cycles of critical parts and errors 

with certain part numbers. The 

manufacturer also determined that the 

life limit of a certain compressor case 

installed on Model M601E engines was 

not listed in the ALS of the applicable 

EMM. 

AD 2021–13–07 requires recalculating 

the life of critical parts and replacing 

critical parts, if necessary. AD 2021–13– 


khammond on DSKJM1Z7X2PROD with PROPOSALS
Federal Register / Vol. 88, No. 218 / Tuesday, November 14, 2023 / Proposed Rules 77919 

07 also requires replacing a certain 

compressor case. The FAA issued AD 

2021–13–07 to prevent failure of the 

engine. 

The FAA issued AD 2022–13–16, 

Amendment 39–22102 (87 FR 37986, 

June 27, 2022) (AD 2022–13–16), for all 

GEAC Model M601D–11 engines. AD 

2022–13–16 was prompted by an MCAI 

originated by EASA, which is the 

Technical Agent for the Member States 

of the European Union. EASA issued 

AD 2021–0060, dated March 3, 2021 

(EASA AD 2021–0060) to correct an 

unsafe condition identified as the 

manufacturer revising the ALS to 

introduce a visual inspection of the 

centrifugal compressor case for cracks. 

AD 2022–13–16 requires revising the 

ALS of the existing EMM to incorporate 

a visual inspection of the centrifugal 

compressor case for cracks. The FAA 

issued AD 2022–13–16 to prevent 

failure of the centrifugal compressor 

case. 

The FAA issued AD 2022–14–12, 

Amendment 39–22117 (87 FR 42066, 

July 14, 2022) (AD 2022–14–12), for 

certain GEAC Model M601D–11, 

M601E–11, M601E–11A, M601E–11AS, 

M601E–11S, and M601F engines. AD 

2022–14–12 was prompted by an MCAI 

originated by EASA. EASA issued AD 

2021–0154, dated July 1, 2021 (EASA 

AD 2021–0154) to correct an unsafe 

condition identified as the absence of 

life limits for the propeller shaft part 

number M601–6081.6 in the ALS of the 

applicable EMM, as well as a lack of 

data necessary for operators to 

determine the accumulated life of 

certain propeller shafts, resulting in a 

propeller shaft life limit that may not 

have been implemented correctly. 

AD 2022–14–12 requires replacing the 

propeller shaft for Model M601F 

engines. AD 2022–14–12 also requires 

calculating the accumulated life of the 

propeller shaft and replacing the 

propeller shaft, if necessary, for model 

M601D–11, M601E–11, M601E–11A, 

M601E–11AS, and M601E–11S engines. 

The FAA issued AD 2022–14–12 to 

prevent failure of the propeller shaft. 

The FAA issued AD 2023–01–10, 

Amendment 39–22304 (88 FR 7578, 

February 6, 2023) (AD 2023–01–10) for 

certain GEAC Model M601E–11, 

M601E–11A, M601E–11AS, M601E– 

11S, and M601F engines. AD 2023–01– 

10 was prompted by an MCAI originated 

by EASA. EASA issued EASA AD 2021– 

0264, dated November 22, 2021 (EASA 

AD 2021–0264) to correct an unsafe 

condition identified as the exclusion of 

life limits for certain compressor cases 

and compressor drums from the ALS of 

the EMM and certain compressor cases 

that, following rework, were improperly 

re-identified and had incomplete engine 

logbook entries. 

AD 2023–01–10 requires recalculating 

the consumed life for certain 

compressor cases and compressor 

drums and replacing certain compressor 

cases and compressor drums, if 

necessary. The FAA issued AD 2023– 

01–10 to prevent failure of the 

compressor case and compressor drum. 

Actions Since the Previous ADs Were 

Issued 

Since the FAA issued AD 2021–13– 

07, AD 2022–13–16, AD 2022–14–12, 

and AD 2023–01–10, EASA superseded 

EASA AD 2021–0060 and EASA AD 

2021–0154 and issued EASA AD 2023– 

0020, dated January 23, 2023 (EASA AD 

2023–0020) (also referred to as the 

MCAI). The MCAI states that the 

manufacturer revised the ALS to 

incorporate new and more restrictive 

tasks and limitations, expand the 

applicability to all model M601 series 

engines, and include certain 

requirements that were previously 

addressed by EASA Emergency AD 

2021–0125–E and EASA AD 2021–0264. 

The MCAI also states that the 

manufacturer published service 

information that specifies instructions 

to determine the accumulated life of 

certain propeller shafts. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–2149. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed EASA AD 2023– 

0020, which specifies procedures for 

accomplishment of the actions specified 

in the ALS, including performing 

maintenance tasks, replacing lifelimited parts, and revising the existing 

approved maintenance or inspection 

program, as applicable, by incorporating 

the instructions and associated 

thresholds and intervals described in 

the ALS, as applicable to engine model 

and depending on engine configuration. 

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 

accomplishing the actions specified in 

the MCAI 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.’’ 

This proposed AD would terminate 

the requirements of paragraphs (g)(1) 

through (3) of AD 2021–13–07 for model 

M601D–11, M601E–11, M601E–11A, 

M601E–11AS, M601E–11S, and M601F 

engines only. 

This proposed AD would terminate 

the requirements of paragraphs (g)(1) 

through (3) of AD 2023–01–10 for model 

M601E–11, M601E–11A, M601E–11AS, 

M601E–11S, and M601F engines only. 

The owner/operator (pilot) holding at 

least a private pilot certificate may 

revise the ALS of the existing EMM and 

must enter compliance with the 

applicable paragraph of this proposed 

AD into the engine maintenance records 

in accordance with 14 CFR 43.9(a) and 

91.417(a)(2)(v). The pilot may perform 

this action because it only involves 

revising the pilot’s manual. This action 

could be performed equally well by a 

pilot or a mechanic. This is an 

exception to the FAA’s standard 

maintenance regulations. 

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 2023–0020 in the FAA final 

rule. This proposed AD would, 

therefore, require compliance with 

EASA AD 2023–0020 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 the compliance times,’’ 

compliance with this AD requirement is 

not limited to the section titled 


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77920 Federal Register / Vol. 88, No. 218 / Tuesday, November 14, 2023 / Proposed Rules 

‘‘Required Action(s) and Compliance 

Time(s)’’ in EASA AD 2023–0020. 

Service information required by the 

EASA AD for compliance will be 

available at regulations.gov under 

Docket No. FAA–2023–2149 after the 

FAA final rule is published. 

Differences Between This Proposed AD 

and the MCAI 

Where the MCAI applies to Model 

M601D, M601D–1, M601D–2, M601D– 

11NZ, M601E, M601E–21, M601FS, and 

M601Z engines, this proposed AD does 

not, as these engine models are not type 

certificated in the United States. 

Where the MCAI 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 proposed 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. 

Where the MCAI specifies the ALS of 

GEAC EMM No. 0982309, Revision 21, 

dated November 18, 2022, this proposed 

AD specifies the ALS of GEAC EMM No. 

0982309, Revision 22, dated March 10, 

2023. The ALS in Revision 22 of GEAC 

EMM No. 0982309 is unchanged from 

Revision 21. 

Where paragraph (3) of the MCAI 

specifies revising the approved Aircraft 

Maintenance Programme within 12 

months after the effective date of EASA 

AD 2023–0020, 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 the MCAI. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 42 

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 $3,570 

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 

2022–13–16, Amendment 39–22102 (87 

FR 37986, June 27, 2022); and 

Airworthiness Directive 2022–14–12, 

Amendment 39–22117 (87 FR 42066, 

July 14, 2022); and 

■ b. Adding the following new 

airworthiness directive: 

GE Aviation Czech s.r.o. (Type Certificate 

Previously Held by WALTER Engines 

a.s., Walter a.s., and MOTORLET a.s.): 

Docket No. FAA–2023–2149; Project 

Identifier MCAI–2023–00136–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by December 29, 

2023. 

(b) Affected ADs 

(1) This AD affects AD 2021–13–07, 

Amendment 39–21612 (86 FR 31601, June 

15, 2021) (AD 2021–13–07). 

(2) This AD replaces AD 2022–13–16, 

Amendment 39–22102 (87 FR 37986, June 

27, 2022) (AD 2022–13–16). 

(3) This AD replaces AD 2022–14–12, 

Amendment 39–22117 (87 FR 42066, July 14, 

2022) (AD 2022–14–12). 

(4) This AD affects AD 2023–01–10, 

Amendment 39–22304 (88 FR 7578, February 

6, 2023) (AD 2023–01–10). 

(c) Applicability 

This AD applies to GE Aviation Czech 

s.r.o. (GEAC) (type certificate previously held 

by WALTER Engines a.s., Walter a.s., and 

MOTORLET a.s.) Model M601D–11, M601E– 

11, M601E–11A, M601E–11AS, M601E–11S, 

and M601F engines. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7210, Turbine Engine Reduction Gear. 

(e) Unsafe Condition 

This AD was prompted by the 

manufacturer revising the airworthiness 

limitations section (ALS) of the existing 

engine maintenance manual (EMM) to 

introduce new and more restrictive tasks and 

limitations and associated thresholds and 

intervals for life-limited parts. The FAA is 

issuing this AD to prevent failure of the 

engine. The unsafe condition, if not 

addressed, could result in uncontained 

release of a critical part, damage to the 

engine, and damage to the airplane. 


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Federal Register / Vol. 88, No. 218 / Tuesday, November 14, 2023 / Proposed Rules 77921 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) 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 2023–0020, dated 

January 23, 2023 (EASA AD 2023–0020). 

(2) The action required by paragraph (g)(1) 

of this AD may be performed by the owner/ 

operator (pilot) holding at least a private pilot 

certificate and must be entered into the 

aircraft records showing compliance with 

this AD in accordance with 14 CFR 43.9(a) 

and 91.417(a)(2)(v). The record must be 

maintained as required by 14 CFR 91.417, 

121.380, or 135.439. 

(h) Exceptions to EASA AD 2023–0020 

(1) Where EASA AD 2023–0020 defines the 

AMP as ‘‘The Aircraft Maintenance 

Programme (AMP) contains the tasks on the 

basis of which the scheduled maintenance is 

conducted to ensure the continuing 

airworthiness of each operated engine,’’ 

replace that text with ‘‘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 2023–0020 specifies 

the ALS as ‘‘The Airworthiness Limitations 

Section of the GEAC Engine Maintenance 

Manual (EMM) No. 0982309 Revision 21,’’ 

replace that text with ‘‘The Airworthiness 

Limitations Section of the GEAC Engine 

Maintenance Manual (EMM) No. 0982309 

Revision 22.’’ The ALS in Revision 22 of the 

EMM is unchanged from Revision 21. 

(3) Where EASA AD 2023–0020 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

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

0020 specifies ‘‘Within 12 months after the 

effective date of this AD, revise the approved 

AMP,’’ replace that text with ‘‘Within 90 

days after the effective date of this AD, revise 

the ALS of the existing approved engine 

maintenance or inspection program, as 

applicable.’’ 

(5) This AD does not require compliance 

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

AD 2023–0020. 

(6) This AD does not adopt the Remarks 

paragraph of EASA AD 2023–0020. 

(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 2023–0020. 

(j) Terminating Action for Certain Actions 

Required by Affected ADs 

(1) Accomplishing the actions required by 

paragraph (g) of this AD terminates the 

requirements of paragraphs (g)(1) through (3) 

of AD 2021–13–07 for model M601D–11, 

M601E–11, M601E–11A, M601E–11AS, 

M601E–11S, and M601F engines only. 

(2) Accomplishing the actions required by 

paragraph (g) of this AD terminates the 

requirements of paragraphs (g)(1) through (3) 

of AD 2023–01–10 for model M601E–11, 

M601E–11A, M601E–11AS, M601E–11S, and 

M601F engines only. 

(k) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, International Validation 

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 International Validation 

Branch, send it to the attention of the person 

identified in paragraph (l) of this AD and 

email to ANE-AD-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. 

(l) Additional Information 

For more information about this AD, 

contact Barbara Caufield, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; phone: (781) 238– 

7146; email: barbara.caufield@faa.gov. 

(m) 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 2023–0020, dated January 23, 

2023. 

(ii) [Reserved] 

(3) For EASA AD 2023–0020, 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 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 2, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–24639 Filed 11–13–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF THE TREASURY 

Internal Revenue Service 

26 CFR Part 1 

[REG–128276–12] 

RIN 1545–BO07 

Recognition and Deferral of Section 

987 Gain or Loss; Comment Period 

Reopening 

AGENCY: Internal Revenue Service (IRS), 

Treasury. 

ACTION: Notice of proposed rulemaking; 

reopening of comment period. 

SUMMARY: The Department of the 

Treasury and the IRS are reopening the 

comment period for REG–128276–12, 

published in the Federal Register on 

December 8, 2016, relating to the 

determination and recognition of 

taxable income or loss and foreign 

currency gain or loss with respect to a 

qualified business unit. 

DATES: The comment period for REG– 

128276–12 (81 FR 88882, December 8, 

2016) (the ‘‘2016 proposed regulations’’) 

is reopened, and additional written or 

electronic comments and requests for a 

public hearing must be received by 

February 12, 2024. 

ADDRESSES: Commenters are strongly 

encouraged to submit additional public 

comments electronically via the Federal 

eRulemaking Portal at https://

www.regulations.gov (indicate IRS and 

REG–128276–12) by following the 

online instructions for submitting 

comments. Requests for a public hearing 

must be submitted as prescribed in the 

‘‘Comments and Requests for a Public 

Hearing’’ section. Once submitted to the 

Federal eRulemaking Portal, comments 

cannot be edited or withdrawn. The 

Department of the Treasury (the 

‘‘Treasury Department’’) and the IRS 

will publish for public availability any 

comments submitted to the IRS’s public 

docket. Send paper submissions to: 

CC:PA:01:PR (REG–128276–12), Room 

5203, Internal Revenue Service, P.O. 

Box 7604, Ben Franklin Station, 

Washington, DC 20044. 

FOR FURTHER INFORMATION CONTACT: Jack 

Zhou at (202) 317–6938; concerning 

submissions of comments, requests for a 

public hearing, or access to a public 

hearing, Vivian Hayes at (202) 317–6901 

(not toll-free numbers) or by email to 

publichearings@irs.gov (preferred). 

SUPPLEMENTARY INFORMATION: On 

December 8, 2016, the Treasury 

Department and the IRS published a 

notice of proposed rulemaking (REG– 

128276–12, 81 FR 88882, December 8, 


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