44652 Federal Register / Vol. 86, No. 154 / Friday, August 13, 2021 / Proposed Rules 

Nuclear Waste Policy Act states, in part, 

that ‘‘[t]he Commission shall, by rule, 

establish procedures for the licensing of 

any technology approved by the 

Commission under Section 219(a) [sic: 

218(a)] for use at the site of any civilian 

nuclear power reactor.’’ 

To implement this mandate, the 

Commission approved dry storage of 

spent nuclear fuel in NRC-approved 

casks under a general license by 

publishing a final rule that added a new 

subpart K in part 72 of title 10 of the 

Code of Federal Regulations (10 CFR) 

entitled ‘‘General License for Storage of 

Spent Fuel at Power Reactor Sites’’ (55 

FR 29181; July 18, 1990). This rule also 

established a new subpart L in 10 CFR 

part 72 entitled ‘‘Approval of Spent Fuel 

Storage Casks,’’ which contains 

procedures and criteria for obtaining 

NRC approval of spent fuel storage cask 

designs. The NRC subsequently issued a 

final rule on January 6, 2003 (68 FR 

463), that approved the Standardized 

Advanced NUHOMS® Horizontal 

Modular Storage System design and 

added it to the list of NRC-approved 

cask designs in § 72.214 as Certificate of 

Compliance No. 1029. 

IV. Plain Writing 

The Plain Writing Act of 2010 (Pub. 

L. 111–274) requires Federal agencies to 

write documents in a clear, concise, 

well-organized manner. The NRC has 

written this document to be consistent 

with the Plain Writing Act as well as the 

Presidential Memorandum, ‘‘Plain 

Language in Government Writing,’’ 

published June 10, 1998 (63 FR 31885). 

The NRC requests comment on the 

proposed rule with respect to clarity 

and effectiveness of the language used. 

V. Availability of Documents 

The documents identified in the 

following table are available to 

interested persons, as indicated. 

Document ADAMS 

Accession No. 

TN Americas, LLC Renewal Application for the Standardized NUHOMS® Horizontal Modular Storage System Certificate of Compliance No. 1029, dated May 22, 2019.ML19148A484 (package). 

TN Americas, LLC Response to Request for Supplemental Information for the Technical Review of the Application 

for Certificate of Compliance No. 1029, dated December 4, 2019.

ML19338E132. 

TN Americas, LLC Response to Request for Additional Information of the Application for Renewal of the Certificate of Compliance No. 1029, dated May 28, 2020.ML20192A127. 

User Need Memorandum for Rulemaking for Certificate of Compliance Renewal, Initial Issue (Amendment Number 0), Amendment Numbers 1, 3, and 4 to Standardized Advanced NUHOMS® Horizontal Modular Storage 

System.

ML21067A166. 

Preliminary Safety Evaluation Report for the Standardized Advanced NUHOMS® Horizontal Modular Storage System Certificate of Compliance Renewal.ML21067A167. 

Proposed Certificate of Compliance No. 1029, Renewed Initial Certificate .................................................................. ML21067A168. 

Proposed Technical Specifications, Attachment A, Certificate of Compliance No. 1029, Renewed Initial Certificate ML21067A169. 

Proposed Certificate of Compliance No. 1029, Renewed Amendment No. 1 .............................................................. ML21067A170. 

Proposed Technical Specifications, Attachment A, Certificate of Compliance No. 1029, Renewed Amendment No. 

1.

ML21067A171. 

Proposed Certificate of Compliance No. 1029, Renewed Amendment No. 3 .............................................................. ML21067A172. 

Proposed Technical Specifications, Attachment A, Certificate of Compliance No. 1029, Renewed Amendment No. 

3.

ML21067A173. 

Proposed Certificate of Compliance No. 1029, Renewed Amendment No. 4 .............................................................. ML21067A174. 

Proposed Technical Specifications, Attachment A, Certificate of Compliance No. 1029, Renewed Amendment No. 

4.

ML21067A175. 

The NRC may post materials related 

to this document, including public 

comments, on the Federal rulemaking 

website at https://www.regulations.gov 

under Docket ID NRC–2021–0108. 

Dated: August 6, 2021. 

For the Nuclear Regulatory Commission. 

Daniel H. Dorman, 

Acting Executive Director for Operations. 

[FR Doc. 2021–17194 Filed 8–12–21; 8:45 am] 

BILLING CODE 7590–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0653; Project 

Identifier AD–2021–00170–R] 

RIN 2120–AA64 

Airworthiness Directives; MD 

Helicopters Inc. (MDHI) 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 

MD Helicopters Inc. (MDHI), Model 

369D, 369E, 369F, 369FF, 369H, 369HE, 

369HM, 369HS, 500N, and 600N 

helicopters. This proposed AD was 

prompted by a report of a spiral crack 

in the pilot-to-copilot tail rotor torque 

tube (torque tube). This proposed AD 

would require a one-time visual and 

recurring borescope inspections of the 

torque tube and depending on the 

results, removing the torque tube from 

service. 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 September 27, 

2021. 

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


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Monday through Friday, except Federal 

holidays. 

For service information identified in 

this NPRM, contact MD Helicopters, 

Inc., Attn: Customer Support Division, 

4555 E McDowell Rd., Mail Stop M615, 

Mesa, AZ 85215–9734; telephone (800) 

388–3378; fax (480) 346–6813; or at 

https://www.mdhelicopters.com. 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–2021–0653; 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: 

Payman Soltani, Aerospace Engineer, 

Airframe Section, Los Angeles ACO 

Branch, Compliance & Airworthiness 

Division, FAA, 3960 Paramount Blvd., 

Lakewood, CA 90712; telephone (562) 

627–5313; email payman.soltani@

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–2021–0653; Project Identifier AD– 

2021–00170–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 Payman Soltani, 

Aerospace Engineer, Airframe Section, 

Los Angeles ACO Branch, Compliance & 

Airworthiness Division, FAA, 3960 

Paramount Blvd., Lakewood, CA 90712; 

telephone (562) 627–5313; email 

payman.soltani@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 MDHI Model 369D, 369E, 369F, 

369FF, 369H, 369HE, 369HM, 369HS, 

500N, and 600N helicopters. This 

proposed AD would require a one-time 

visual and recurring borescope 

inspections of the torque tube and 

depending on the results, removing the 

torque tube from service. This proposed 

AD was prompted by a report of a spiral 

crack in the torque tube that appears to 

have originated from a hole where the 

tail rotor torque tube control fitting 

attaches to the torque tube on a Model 

369FF helicopter. This crack resulted in 

increased left pedal movement and 

subsequent reduced directional control 

pedal authority. Other model 

helicopters are affected due to design 

similarity. This condition, if not 

addressed, could result in failure of the 

torque tube, loss of tail rotor control, 

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 these same 

type designs. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed MD Helicopters 

Service Bulletin SB369D–229R2 for 

Model 369D helicopters, SB369E–129R2 

for Model 369E helicopters, SB369F– 

119R2 for Model 369F and 369FF 

helicopters, SB369H–263R2 for Model 

369H, 369HE, 369HM, and 369HS 

helicopters, SB500N–066R2 for Model 

500N helicopters, and SB600N–080R2 

for Model 600N helicopters, each dated 

March 24, 2021 (Revision 2). These 

service bulletins are co-published as one 

document. Revision 2 of this service 

information specifies procedures for a 

one-time visual inspection and 

recurring borescope inspections, 

completing a Service Operation Report, 

and returning a removed torque tube to 

an authorized service center or MDHI. 

Other Related Service Information 

The FAA also reviewed MD 

Helicopters Service Bulletin SB369H– 

263, SB369D–229, SB369E–129, 

SB369F–119, SB500N–066, and 

SB600N–080, each dated January 30, 

2020 (initial issuance), and MD 

Helicopters Service Bulletin SB369H– 

263R1, SB369D–229R1, SB369E–129R1, 

SB369F–119R1, SB500N–066R1, and 

SB600N–080R1, each dated May, 15 

2020 (Revision 1). The initial issuance 

and Revision 1 of this service 

information specify the same 

procedures as Revision 2 of this service 

information, except Revision 1 clarified 

the torque value to apply to the nut and 

Revision 2 deletes Method 2 of the 

Accomplishment Instructions and adds 

a recurring 300-hour borescope 

inspection of the torque tube. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would initially 

require visually inspecting the torque 

tube exterior using a flashlight and 

mirror and borescope inspecting the 

interface of the torque tube and bushing 

segments for a crack, elongation, and 

other damage, which may be indicated 

by any corrosion, pitting, crazing, dents, 

dings, displacement of material at the 

bolt hole edge, or fretting of the hole. 

Thereafter, this proposed AD would 

require repeating the borescope 

inspection. If there is a crack, 

elongation, or other damage, this 

proposed AD would require removing 

the torque tube from service. 

Differences Between This Proposed AD 

and the Service Information 

For helicopters that have accumulated 

600 or less total hours time-in-service 

(TIS), Revision 2 of the service 

information specifies an initial 

compliance time of during the next 100- 

hour inspection, whereas this proposed 

AD would require initial actions within 

100 hours TIS after the effective date of 

this AD instead. For helicopters that 

have accumulated more than 600 total 


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hours TIS, Revision 2 of the service 

information specifies initial a 

compliance time of within 5 hours of 

flight time, whereas this proposed AD 

would require initial actions within 5 

hours TIS or 30 days after the effective 

date of this AD, whichever occurs later, 

instead. 

Revision 2 of the service information 

specifies returning a removed torque 

tube, whereas this proposed AD would 

require removing the torque tube from 

service instead. Revision 2 of the service 

information specifies completing a 

Service Operation Report, whereas this 

proposed AD does not include that 

requirement. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 58 

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. 

Visually inspecting the torque tube 

would take a minimal amount of time. 

Borescope inspecting the torque tube 

would take about 1 work-hour for an 

estimated cost of $85 per helicopter and 

$4,930 for the U.S. fleet, per inspection 

cycle. 

If required, replacing the torque tube 

would take about 5 work-hours and 

parts would cost about $983 for an 

estimated cost of $1,408 per helicopter. 

The FAA has included all known 

costs in its cost estimate. According to 

the manufacturer, however, some of the 

costs of this proposed AD may be 

covered under warranty, thereby 

reducing the cost impact on affected 

operators. 

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, 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: 

MD Helicopters Inc. (MDHI): Docket No. 

FAA–2021–0653; Project Identifier AD– 

2021–00170–R. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by September 

27, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to MD Helicopters Inc. 

(MDHI) Model 369D, 369E, 369F, 369FF, 

369H, 369HE, 369HM, 369HS, 500N, and 

600N helicopters, certificated in any 

category, with pilot-to-copilot tail rotor 

torque tube (torque tube) part number 

369H7531–9/–11/–13, installed. 

(d) Subject 

Joint Aircraft Service Component (JASC) 

Code: 6720, Tail Rotor Control System. 

(e) Unsafe Condition 

This AD was prompted by a report of a 

spiral crack in the torque tube. The FAA is 

issuing this AD to prevent failure of a torque 

tube. The unsafe condition, if not addressed, 

could result in loss of tail rotor control 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) Using a flashlight and mirror, visually 

inspect the exterior of the torque tube at the 

interface of the torque tube and bushing 

segments, and borescope inspect the interior 

of the torque tube at the interface of the 

torque tube and bushing segments for a crack, 

elongation, and other damage, which may be 

indicated by any corrosion, pitting, crazing, 

dents, dings, displacement of material at the 

bolt hole edge, or fretting of the hole by 

following the Accomplishment Instructions, 

paragraphs 2.A.(1). through (3).(a)., of MD 

Helicopters Service Bulletin SB369H–263R2, 

SB369D–229R2, SB369E–129R2, SB369F– 

119R2, SB500N–066R2, or SB600N–080R2, 

each dated March 24, 2021, as applicable to 

your model helicopter, as follows: 

Note 1 to paragraph (g)(1): Scaling of the 

inner diameter primer or paint may be an 

indication of a crack. 

(i) For helicopters that have accumulated 

600 or less total hours time-in-service (TIS), 

within 100 hours TIS after the effective date 

of this AD. 

(ii) For helicopters that have accumulated 

more than 600 total hours TIS, within 5 

hours TIS or 30 days after the effective date 

of this AD, whichever occurs later. 

Note 2 to paragraph (g)(1)(ii): It is advised 

to limit flights with increased, excessive, or 

rapid pedal movements before the first 

instance of the actions required by paragraph 

(g)(1)(ii) are accomplished. 

(iii) If there is a crack, elongation, or other 

damage, before further flight, remove the 

torque tube from service. 

(2) Thereafter following paragraph (g)(1) of 

this AD, at intervals not to exceed 300 hours 

TIS, borescope inspect the interior of the 

torque tube at the interface of the torque tube 

and bushing segments as required by 

paragraph (g)(1) of this AD. If there is a crack, 

elongation, or other damage, before further 

flight, remove the torque tube from service. 

(h) Credit for Previous Actions 

You may take credit for the instance of the 

actions required by paragraphs (g)(1)(i) or (ii) 

of this AD if you performed corresponding 

actions before the effective date of this AD 

using MD Helicopters Service Bulletin 

SB369H–263, SB369D–229, SB369E–129, 

SB369F–119, SB500N–066, or SB600N–080, 

each dated January 30, 2020, as applicable to 

your model helicopter, or MD Helicopters 

Service Bulletin SB369H–263R1, SB369D– 

229R1, SB369E–129R1, SB369F–119R1, 

SB500N–066R1, or SB600N–080R1, each 

dated May, 15 2020, as applicable to your 

model helicopter. 


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(i) No Reporting Requirement 

Although MD Helicopters Service Bulletin 

SB369H–263R2, SB369D–229R2, SB369E– 

129R2, SB369F–119R2, SB500N–066R2, and 

SB600N–080R2, each dated March 24, 2021, 

specify to submit certain information to the 

manufacturer, this AD does not include that 

requirement. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Los Angeles ACO, 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, information may be emailed to: 9- 

ANM-LAACO-AMOC-REQUESTS@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) Related Information 

(1) For more information about this AD, 

contact Payman Soltani, Aerospace Engineer, 

Airframe Section, Los Angeles ACO Branch, 

Compliance & Airworthiness Division, FAA, 

3960 Paramount Blvd., Lakewood, CA 90712; 

telephone (562) 627–5313; email 

payman.soltani@faa.gov. 

(2) For service information identified in 

this AD, contact MD Helicopters, Inc., Attn: 

Customer Support Division, 4555 E 

McDowell Rd., Mail Stop M615, Mesa, AZ 

85215–9734; telephone (800) 388–3378; fax 

(480) 346–6813; or at https:// 

www.mdhelicopters.com. You may view this 

referenced 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. 

Issued on August 2, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–17032 Filed 8–12–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0662; Project 

Identifier MCAI–2021–00031–E] 

RIN 2120–AA64 

Airworthiness Directives; Rolls-Royce 

Deutschland Ltd & Co KG (Type 

Certificate Previously Held by RollsRoyce plc) Turbofan 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 

certain Rolls-Royce Deutschland Ltd & 

Co KG (RRD) Trent 1000 model turbofan 

engines. This proposed AD was 

prompted by reports of high levels of 

wear on the seal fins on a small number 

of certain high-pressure turbine triple 

seals. This proposed AD would require 

manual deactivation of the modulated 

air system (MAS) control valves. 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 September 27, 

2021. 

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 Rolls-Royce plc, 

Corporate Communications, P.O. Box 

31, Derby, DE24 8BJ, United Kingdom; 

phone: +44 (0)1332 242424; fax: +44 

(0)1332 249936; website: https://

www.rolls-royce.com/contact-us.aspx. 

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 (781) 238–7759. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0662; 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: 

Kevin Clark, Aviation Safety Engineer, 

ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: 

(781) 238–7088; fax: (781) 238–7199; 

email: kevin.m.clark@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–2021–0662; Project Identifier 

MCAI–2021–00031–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 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 Kevin Clark, 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 Community, has issued EASA 

AD 2021–0009, dated January 8, 2021 

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


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