22146 Federal Register / Vol. 87, No. 72 / Thursday, April 14, 2022 / Proposed Rules 

The FAA acknowledges the comments 

unrelated to whether there is an unsafe 

condition. However, because the FAA is 

withdrawing the NPRM, those 

commenters’ requests are no longer 

necessary. 

Withdrawal of the NPRM constitutes 

only such action and does not preclude 

the FAA from further rulemaking on 

this issue, nor does it commit the FAA 

to any course of action in the future. 

Regulatory Findings 

Since this action only withdraws an 

NPRM, it is neither a proposed AD nor 

a final rule. This action, therefore, is not 

covered under Executive Order 12866 or 

the Regulatory Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Safety. 

The Withdrawal 

Accordingly, the notice of proposed 

rulemaking, Docket No. FAA–2021– 

1017; Project Identifier AD–2021– 

00495–A, published in the Federal 

Register on December 1, 2021 (86 FR 

68171), is withdrawn. 

Issued on April 7, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–07871 Filed 4–13–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA 2022–0460; Project 

Identifier AD–2021–00824–R] 

RIN 2120–AA64 

Airworthiness Directives; Bell Textron 

Inc., Helicopters and Various 

Restricted Category Helicopters 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

Bell Textron Inc., Model 204B, 205A, 

205A–1, 205B, 210, 212, 412, 412CF, 

and 412EP helicopters and various 

restricted category helicopters. This 

proposed AD was prompted by reports 

of cracks found on the main 

transmission support case. This 

proposed AD would require repetitive 

inspections of the main transmission 

housing assembly for cracks, pitting, 

and corrosion and depending on the 

results, corrective action. The FAA is 

proposing this AD to address the unsafe 

condition on these products. 

DATES: The FAA must receive comments 

on this proposed AD by May 31, 2022. 

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 

https://www.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. 

For Bell Helicopter service 

information identified in this AD, 

contact Bell Textron, Inc., P.O. Box 482, 

Fort Worth, TX, 76101, United States; 

phone (450) 437–2862 or (800) 363– 

8023; fax (450) 433–0272; email 

productsupport@bellflight.com; or at 

https://www.bellflight.com/support/ 

contact-support. You may purchase the 

ASTM International standard from 

ASTM International at https://

www.astm.org/. You may view this 

service information at the FAA, Office 

of the Regional Counsel, Southwest 

Region, 10101 Hillwood Pkwy., Room 

6N–321, Fort Worth, TX 76177. For 

information on the availability of this 

material at the FAA, call (817) 222– 

5110. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA 2022–0460; 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, any comments received, and 

other information. The street address for 

Docket Operations is listed above. 

FOR FURTHER INFORMATION CONTACT: Hye 

Yoon Jang, Aerospace Engineer, 

Delegation Oversight Section, DSCO 

Branch, Compliance & Airworthiness 

Division, FAA, 10101 Hillwood Pkwy., 

Fort Worth, TX 76177; telephone (817) 

222–5190; email hye.yoon.jang@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 2022–0460; Project Identifier AD– 

2021–00824–R’’ 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 this 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 https://

www.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 Hye Yoon Jang, 

Aerospace Engineer, Delegation 

Oversight Section, DSCO Branch, 

Compliance & Airworthiness Division, 

FAA, 10101 Hillwood Pkwy., Fort 

Worth, TX 76177; telephone (817) 222– 

5190; email hye.yoon.jang@faa.gov. 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 proposes to adopt a new AD 

for Bell Textron Inc., Model 204B, 205A, 

205A–1, 205B, 210, 212, 412, 412CF, 

and 412EP helicopters and the following 

restricted category helicopters: 

• Model HH–1K helicopters; current 

type certificate holders include but are 

not limited to Rotorcraft Development 

Corporation; 

• Southwest Florida Aviation 

International, Inc., Model SW205A–1 

helicopters; 


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Federal Register / Vol. 87, No. 72 / Thursday, April 14, 2022 / Proposed Rules 22147 

• Model TH–1F helicopters; current 

type certificate holders include but are 

not limited to Robinson Air Crane Inc.; 

Rotorcraft Development Corporation; 

and Tamarack Helicopters, Inc.; 

• Model TH–1L helicopters; current 

type certificate holders include but are 

not limited to Bell Textron Inc.; 

Overseas Aircraft Support, Inc. (type 

certificate previously held by JTBAM, 

Inc.); and Rotorcraft Development 

Corporation; 

• Model UH–1A helicopters; current 

type certificate holders include but are 

not limited to Richards Heavylift Helo, 

Inc.; 

• Model UH–1B helicopters; current 

type certificate holders include but are 

not limited to International Helicopters, 

Inc.; Overseas Aircraft Support, Inc.; 

Red Tail Flying Services, LLC; Richards 

Heavylift Helo, Inc.; Rotorcraft 

Development Corporation; Southwest 

Florida Aviation International, Inc. 

(helicopters with an SW204 or 

SW204HP designation are Southwest 

Florida Aviation International, Inc., 

Model UH–1B helicopters); and WSH, 

LLC (type certificate previously held by 

San Joaquin Helicopters); 

• Model UH–1E helicopters; current 

type certificate holders include but are 

not limited to Bell Textron Inc.; 

Overseas Aircraft Support, Inc.; 

Rotorcraft Development Corporation; 

Smith Helicopters; and West Coast 

Fabrications; 

• Model UH–1F helicopters; current 

type certificate holders include but are 

not limited to AST, Inc.; California 

Department of Forestry; Robinson Air 

Crane, Inc.; Rotorcraft Development 

Corporation; and Tamarack Helicopters, 

Inc.; 

• Model UH–1H helicopters; current 

type certificate holders include but are 

not limited to Arrow Falcon Exporters 

Inc.; Global Helicopter Technology, Inc.; 

Hagglund Helicopters, LLC; JJASPP 

Engineering Services, LLC; Northwest 

Rotorcraft, LLC; Overseas Aircraft 

Support, Inc.; Richards Heavylift Helo, 

Inc.; Rotorcraft Development 

Corporation; Southwest Florida 

Aviation International, Inc. (helicopters 

with an SW205 designation are 

Southwest Florida Aviation 

International, Inc., Model UH–1H 

helicopters); and Tamarack Helicopters, 

Inc.; 

• Model UH–1L helicopters; current 

type certificate holders include but are 

not limited to Bell Textron Inc.; 

Overseas Aircraft Support, Inc.; and 

Rotorcraft Development Corporation; 

and 

• Model UH–1P helicopters; current 

type certificate holders include but are 

not limited to Robinson Air Crane, Inc.; 

and Rotorcraft Development 

Corporation. 

This proposed AD would require 

repetitive inspections of the main 

transmission housing assembly. This 

proposed AD was prompted by reports 

of main transmission support cases 

found cracked at one of the lateral 

mounts. This condition, if not 

addressed, could result in cracking at 

the upper or lower surfaces of the lateral 

mounts, loss of load carrying 

capabilities of the main transmission, 

and subsequent loss of control of the 

helicopter. 

FAA’s Determination 

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. 

Other Related Service Information 

The FAA reviewed Fluorescent 

Penetrant Inspection Method (ASTM 

E1417) of Chapter 6—Non-Destructive 

Inspection, of Bell Helicopter, Standard 

Practices Manual BHT–ALL–SPM, 

Revision 8, dated August 30, 2021, and 

ASTM International Standard Practice 

for Liquid Penetrant Testing E1417/ 

E1417M–21, dated September 1, 2021 

(ASTM E1417). This service information 

specifies procedures for the fluorescent 

penetrant inspection. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require, 

within 3,000 hours time-in-service (TIS) 

accumulated by the main transmission 

after the effective date of this proposed 

AD, and thereafter at intervals not to 

exceed 3,000 hours TIS accumulated by 

the main transmission, removing certain 

screws and washers and visually 

inspecting the upper and lower 

transmission support case lateral mount 

screws for corrosion and thread damage, 

washers for corrosion and pitting, 

bushings for corrosion and pitting, and 

lateral mount surfaces for corrosion and 

mechanical damage such as any crack or 

pitting. If there is any corrosion, thread 

damage, or mechanical damage, this 

proposed AD would require removing 

the affected parts from service before 

further flight. 

This proposed AD would also require 

repetitive fluorescent penetrant 

inspections (FPIs) of all surfaces of the 

main transmission support case lateral 

mounts for a crack. For helicopters with 

a main transmission that has 

accumulated 6,000 or more total hours 

TIS, the initial FPI would be required 

before further flight after the effective 

date of this AD. For helicopters with a 

main transmission that has accumulated 

less than 6,000 total hours TIS, the 

initial FPI would be required before the 

main transmission accumulates 6,000 

total hours TIS. For all helicopters, 

following the initial FPI, this proposed 

AD would require performing an FPI at 

intervals not to exceed 6,000 hours TIS 

accumulated by the main transmission. 

If there is any crack, this proposed AD 

would require removing the main 

transmission support case from service 

before further flight. 

Costs of Compliance 

The FAA estimates that this proposed 

AD would affect up to 621 helicopters 

of U.S. Registry. Labor rates are 

estimated at $85 per work-hour. Based 

on these numbers, the FAA estimates 

the following costs to comply with this 

proposed AD. 

Inspecting the main transmission 

mount assembly would take about 1 

work-hour, for an estimated cost of $85 

per helicopter and $52,785 for the U.S. 

fleet, per inspection cycle. 

Inspecting the main transmission 

support case lateral mounts by 

fluorescent penetrant method would 

take about 1 work-hour for an estimated 

cost of $85 per helicopter, and $52,785 

for the U.S. fleet, per inspection cycle. 

If required, replacing the transmission 

support case assembly hardware parts 

including 8 washers, 8 screws, and 4 

bushings would take about 1 work-hour 

and parts would cost up to $100 per part 

for an estimated cost of up to $2,000 per 

helicopter. 

If required, replacing the main 

transmission support case assembly 

would take up to 60 work-hours and 

parts would cost up to $54,501 for an 

estimated cost of up to $59,601 per 

helicopter. 

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 


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22148 Federal Register / Vol. 87, No. 72 / Thursday, April 14, 2022 / Proposed Rules 

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 this 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 adding 

the following new airworthiness 

directive: 

Bell Textron Inc., and Various Restricted 

Category Helicopters: Docket No. FAA 

2022–0460; Project Identifier AD–2021– 

00824–R. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by May 31, 

2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to the following: 

(1) Bell Textron Inc., Model 204B, 205A, 

205A–1, 205B, 210, 212, 412, 412CF, and 

412EP helicopters, certificated in any 

category; and 

(2) Various restricted category helicopters: 

(i) Model HH–1K helicopters; current type 

certificate holders include but are not limited 

to Rotorcraft Development Corporation; 

(ii) Southwest Florida Aviation 

International, Inc. Model SW205A–1 

helicopters; 

(iii) Model TH–1F helicopters; current type 

certificate holders include but are not limited 

to Robinson Air Crane Inc.; Rotorcraft 

Development Corporation; and Tamarack 

Helicopters, Inc.; 

(iv) Model TH–1L helicopters; current type 

certificate holders include but are not limited 

to Bell Textron Inc.; Overseas Aircraft 

Support, Inc. (type certificate previously held 

by JTBAM, Inc.); and Rotorcraft Development 

Corporation; 

(v) Model UH–1A helicopters; current type 

certificate holders include but are not limited 

to Richards Heavylift Helo, Inc.; 

(vi) Model UH–1B helicopters; current type 

certificate holders include but are not limited 

to International Helicopters, Inc.; Overseas 

Aircraft Support, Inc.; Red Tail Flying 

Services, LLC; Richards Heavylift Helo, Inc.; 

Rotorcraft Development Corporation; 

Southwest Florida Aviation International, 

Inc.; and WSH, LLC (type certificate 

previously held by San Joaquin Helicopters); 

Note 1 to paragraph (c)(2)(vi): Helicopters 

with an SW204 or SW204HP designation are 

Southwest Florida Aviation International, 

Inc., Model UH–1B helicopters. 

(vii) Model UH–1E helicopters; current 

type certificate holders include but are not 

limited to Bell Textron Inc.; Overseas Aircraft 

Support, Inc.; Rotorcraft Development 

Corporation; Smith Helicopters; and West 

Coast Fabrications; 

(viii) Model UH–1F helicopters; current 

type certificate holders include but are not 

limited to AST, Inc.; California Department 

of Forestry; Robinson Air Crane, Inc.; 

Rotorcraft Development Corporation; and 

Tamarack Helicopters, Inc.; 

(ix) Model UH–1H helicopters; current 

type certificate holders include but are not 

limited to Arrow Falcon Exporters, Inc.; 

Global Helicopter Technology, Inc.; 

Hagglund Helicopters, LLC; JJASPP 

Engineering Services LLC; Northwest 

Rotorcraft, LLC; Overseas Aircraft Support, 

Inc.; Richards Heavylift Helo, Inc.; Rotorcraft 

Development Corporation; Southwest Florida 

Aviation International, Inc.; and Tamarack 

Helicopters, Inc.; 

Note 2 to paragraph (c)(2)(ix): Helicopters 

with an SW205 designation are Southwest 

Florida Aviation International, Inc., Model 

UH–1H helicopters. 

(x) Model UH–1L helicopters; current type 

certificate holders include but are not limited 

to Bell Textron Inc.; Overseas Aircraft 

Support, Inc.; and Rotorcraft Development 

Corporation; and 

(xi) Model UH–1P helicopters; current type 

certificate holders include but are not limited 

to Robinson Air Crane, Inc.; and Rotorcraft 

Development Corporation. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 6320, Main Rotor Gearbox. 

(e) Unsafe Condition 

This AD was prompted by reports of cracks 

found in the main transmission support case 

possibly due to corrosion. The FAA is issuing 

this AD to detect and address corrosion and 

other mechanical damage of the main 

transmission support case assembly. The 

unsafe condition, if not addressed, could 

result in cracking at the upper or lower 

surfaces of the lateral mounts, loss of load 

carrying capabilities of the main 

transmission, and subsequent loss of control 

of the helicopter. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) Within 3,000 hours time-in-service 

(TIS) accumulated by the main transmission 

after the effective date of this AD, and 

thereafter at intervals not to exceed 3,000 

hours TIS accumulated by the main 

transmission, remove the screws and washers 

from the upper and lower surfaces of the 

main transmission support case lateral 

mounts and accomplish the following: 

(i) Visually inspect each screw for 

corrosion and thread damage. If there is any 

corrosion or thread damage, before further 

flight, remove the screw from service. 

(ii) Visually inspect each upper and lower 

washer for corrosion and pitting. If there is 

any corrosion or pitting, before further fight, 

remove the washer from service. 

(iii) Visually inspect each installed bushing 

for corrosion and pitting. If there is any 

corrosion or pitting, before further fight, 

remove the bushing from service. 

(iv) Visually inspect each upper and lower 

main transmission support case lateral mount 

machined surface adjacent to each washer 

and each lateral mount threaded screw hole 

for corrosion and mechanical damage. For 

the purposes of this AD, mechanical damage 

may be indicated by a crack or pitting. If 

there is any corrosion or mechanical damage, 

before further flight, remove the main 

transmission support case assembly from 

service. 

(2) Fluorescent penetrant inspect (FPI) all 

surfaces of the main transmission support 

case lateral mounts for a crack at the 

compliance times identified in paragraph 

(g)(2)(i) or (ii) of this AD. 

(i) For helicopters with a main 

transmission that has accumulated 6,000 or 

more total hours TIS, before further flight 

after the effective date of this AD. 

(ii) For helicopters with a main 

transmission that has accumulated less than 

6,000 total hours TIS, before accumulating 

6,000 total hours TIS on the main 

transmission after the effective date of this 

AD. 

(iii) If there is any crack, before further 

flight, remove the main transmission support 

case assembly from service. 

Note 3 to paragraph (g)(2): This note 

applies to paragraphs (g)(2) and (3) of this 

AD. ASTM International Standard Practice 

for Liquid Penetrant Testing E1417/E1417M– 

21, dated September 1, 2021 (ASTM E1417) 

provides additional information regarding 

and is an acceptable method for the 

fluorescent penetrant inspection. 

(3) Thereafter following paragraph (g)(2) of 

this AD, at intervals not to exceed 6,000 

hours TIS accumulated by the main 


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transmission, FPI all surfaces of the main 

transmission support case lateral mounts for 

a crack. If there is any crack, before further 

flight, remove the main transmission support 

case assembly from service. 

(h) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, DSCO 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 certification office, 

send it to the attention of the person 

identified in Related Information. 

Information may be emailed to: 9-ASW-190- 

COS@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. 

(i) Related Information 

(1) For more information about this AD, 

contact Hye Yoon Jang, Aerospace Engineer, 

Delegation Oversight Section, DSCO Branch, 

Compliance & Airworthiness Division, FAA, 

10101 Hillwood Pkwy., Fort Worth, TX 

76177; telephone (817) 222–5190; email 

hye.yoon.jang@faa.gov. 

(2) For ASTM service information 

identified in this AD, you may purchase the 

ASTM standard from ASTM International at 

https://www.astm.org/. You may view this 

material at the FAA, Office of the Regional 

Counsel, Southwest Region, 10101 Hillwood 

Pkwy., Room 6N–321, Fort Worth, TX 76177. 

For information on the availability of this 

material at the FAA, call (817) 222–5110. 

Issued on April 7, 2022. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2022–07887 Filed 4–13–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2022–0459; Project 

Identifier MCAI–2021–00266–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.) 

Turboprop Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for all 

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

M601D–11 model turboprop engines. 

This proposed AD was prompted by the 

manufacturer revising the airworthiness 

limitation section (ALS) of the existing 

engine maintenance manual (EMM) to 

include a visual inspection of the 

centrifugal compressor case for cracks. 

This proposed AD would require 

revising the ALS of the existing EMM to 

incorporate a visual inspection of the 

centrifugal compressor case. The FAA is 

proposing this AD to address the unsafe 

condition on these products. 

DATES: The FAA must receive comments 

on this proposed AD by May 31, 2022. 

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 

https://www.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. 

For service information identified in 

this NPRM, contact GE Aviation Czech, 

Beranovy ́ch 65, 199 02 Praha 9— 

Letnˇ any, Czech Republic; phone: +420 

222 538 999; email: tp.ops@ge.com. 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. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2022–0459; 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. 

FOR FURTHER INFORMATION CONTACT: 

Barbara Caufield, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 

District Avenue, Burlington, MA 01803; 

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–2022–0459; Project Identifier 

MCAI–2021–00266–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 this NPRM 

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 https://

www.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, ECO Branch, 

FAA, 1200 District Avenue, Burlington, 

MA 01803. 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 European Union Aviation Safety 

Agency (EASA), which is the Technical 

Agent for the Member States of the 

European Union, has issued EASA AD 

2021–0060, dated March 3, 2021 

(referred to after this as ‘‘the MCAI’’), to 

address the unsafe condition on these 

products. The MCAI states: 

The airworthiness limitations for certain 

M601 engine models, which are approved by 


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