Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Proposed Rules 10875 

32This reflects the current threshold for complex 

credit unions. 

33This reflects the proposed threshold for 

complex credit unions. 

34This would reduce the amount of capital they 

are required to hold to be well capitalized by $82 

million in aggregate, based on September 30, 2020 

data. 

35Because of the straightforward nature of the 

proposed change and the extensive comment period 

offered on the various RBC rulemakings, the Board 

is not providing the usual 60-day comment period. 

See NCUA Interpretive Ruling and Policy Statement 

(IRPS) 87–2, as amended by IRPS 03–2 and IRPS 

15–1. 80 FR 57512 (Sept. 24, 2015), available at 

https://www.ncua.gov/files/publications/irps/ 

IRPS1987-2.pdf. 

undue risk to the NCUSIF as the 67 credit unions provided relief represent 

less than 1 percent of industry assets. 

TABLE 1—COMPLEX CREDIT UNIONS WITH A RISK BASED NET WORTH REQUIREMENT GREATER THAN 7 PERCENT

Asset category Number of 

credit unions 

Total assets 

(million) 

Percent of 

industry assets 

Assets >$50M 32 .......................................................................................................................... 94 $66.0 3.7 

Assets >$500M 33 ........................................................................................................................ 27 54.6 3.1 

$50M< Assets <$500M ................................................................................................................ 67 11.4 0.6 

Therefore, this proposed rule would 

provide immediate relief for the 67 

credit unions that must currently 

manage their capital levels to a riskbased net worth requirement above 

seven percent.34 Additionally, it would 

also provide relief to all credit unions 

with assets between $50 million and 

$500 million, which would be able to 

expand their portfolios and simply 

manage their capital levels to meet the 

seven percent leverage requirement to 

be well capitalized. 

The NCUA invites comments on all 

aspects of the proposal.35

V. Regulatory Procedures 

A. Regulatory Flexibility Act (RFA) 

The Regulatory Flexibility Act (RFA) 

generally requires that, in connection 

with a notice of proposed rulemaking, 

an agency prepare and make available 

for public comment an initial regulatory 

flexibility analysis that describes the 

impact of a proposed rule on small 

entities. A regulatory flexibility analysis 

is not required, however, if the agency 

certifies that the rule will not have a 

significant economic impact on a 

substantial number of small entities 

(defined for purposes of the RFA to 

include federally insured credit unions 

with assets less than $100 million) and 

publishes its certification and a short, 

explanatory statement in the Federal 

Register together with the rule. The 

proposed rule would only exempt 

additional credit unions from any riskbased net worth requirement in part 702 

of the NCUA’s regulations applicable to 

complex credit unions. As a result, it 

will not cause any increased burden on 

credit unions and will not have an 

impact on small credit unions. 

Accordingly, the NCUA certifies that the 

proposed rule will not have a significant 

economic impact on a substantial 

number of small credit unions. 

B. Paperwork Reduction Act 

The Paperwork Reduction Act of 1995 

(PRA) applies to rulemakings in which 

an agency by rule creates a new 

paperwork burden on regulated entities 

or modifies an existing burden (44 

U.S.C. 3507(d)). For purposes of the 

PRA, a paperwork burden may take the 

form of a reporting, recordkeeping, or a 

third-party disclosure requirement, 

referred to as an information collection. 

The NCUA may not conduct or sponsor, 

and the respondent is not required to 

respond to, an information collection 

unless it displays a valid Office of 

Management and Budget (OMB) control 

number. This proposed rule contains no 

provisions constituting a collection of 

information under the Paperwork 

Reduction Act of 1995 (44 U.S.C. et 

seq.). 

C. Executive Order 13132 

Executive Order 13132 encourages 

independent regulatory agencies to 

consider the impact of their actions on 

state and local interests. The NCUA, an 

independent regulatory agency as 

defined in 44 U.S.C. 3502(5), voluntarily 

complies with the Executive order to 

adhere to fundamental federalism 

principles. 

This proposed rule would not have 

substantial direct effects 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. The NCUA has 

therefore determined that this proposed 

rule does not constitute a policy that has 

federalism implications for purposes of 

the Executive order. 

D. Assessment of Federal Regulations 

and Policies on Families 

The NCUA has determined that this 

proposed rule will not affect family 

well-being within the meaning of 

section 654 of the Treasury and General 

Government Appropriations Act, 1999, 

Public Law 105–277, 112 Stat. 2681 

(1998). 

List of Subjects in 12 CFR Part 702 

Credit, Credit unions, Reporting and 

recordkeeping requirements. 

By the NCUA Board on January 14, 2021. 

Melane Conyers-Ausbrooks, 

Secretary of the Board. 

For the reasons discussed in the 

preamble, the Board proposes to amend 

part 702 of chapter VII of title 12 of the 

Code of Federal Regulations as follows: 

PART 702—CAPITAL ADEQUACY 

■ 1. The authority citation for part 702 

continues to read as follows: 

Authority: 12 U.S.C. 1766(a), 1790d. 

§ 702.103 [Amended] 

■ 2. Amend § 702.103(a) by removing 

the words ‘‘fifty million dollars 

($50,000,000)’’ and add in their place 

‘‘five hundred million dollars 

($500,000,000).’’ 

[FR Doc. 2021–01400 Filed 2–22–21; 8:45 am] 

BILLING CODE 7535–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0994; Project 

Identifier AD–2020–00687–T] 

RIN 2120–AA64 

Airworthiness Directives; Gulfstream 

Aerospace Corporation Airplanes 

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 Gulfstream Aerospace 

Corporation (Gulfstream) Model GVII– 

G600 airplanes. This proposed AD was 

prompted by a report that a failure mode 

10876 Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Proposed Rules 

in the data concentration network (DCN) 

software causes the pitch attitude value 

to freeze on the primary flight display 

(PFD) for up to 20 seconds. This 

proposed AD would require updating 

the DCN and flight deck master 

operating system (MOS) software. 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 April 9, 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 proposed rule, contact Gulfstream 

Aerospace Corporation, Technical 

Publications Dept., P.O. Box 2206, 

Savannah, GA 31402; phone: (800) 810– 

4853; email: pubs@gulfstream.com; 

website: https://www.gulfstream.com/ 

en/customer-support/. You may view 

this service information at the FAA, 

Airworthiness Products Section, 

Operational Safety Branch, 901 Locust, 

Kansas City, Missouri 64106. For 

information on the availability of this 

material at the FAA, call (816) 329– 

4148. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–0994; 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: 

Myles Jalalian, Aviation Safety 

Engineer, Atlanta ACO Branch, FAA, 

1701 Columbia Avenue, College Park, 

GA 30337; phone: (404) 474–5572; fax: 

(404) 474–5606; email: myles.jalalian@

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–2020–0994; Project Identifier AD– 

2020–00687–T’’ 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 AD 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 AD, 

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 AD. Submissions containing CBI 

should be sent to Myles Jalalian, 

Aviation Safety Engineer, Atlanta ACO 

Branch, FAA, 1701 Columbia Avenue, 

College Park, GA 30337. 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 received a report that on 

certain Gulfstream Model GVII–G600 

airplanes a failure mode in the DCN 

software causes the pitch attitude value 

to freeze on the PFD for up to 20 

seconds. 

During implementation of the DCN 

software update version 10.10.10 for 

certain Model GVII–G500 airplane 

configurations (‘‘Block 1’’), it was 

discovered the software supplier had 

incorrectly implemented one of 

Gulfstream’s design requirements. At 

the time of this discovery on Model 

GVII–G500 Block 1 configurations, the 

DCN software version 10.10.10 had 

already been implemented on Model 

GVII–G600 airplanes in service. This 

airplane has three independent inertial 

reference systems (IRSs), identified as 

IRS1, IRS2, and IRS3, which are 

expected to provide identical pitch data. 

During flight testing, the GVII–G600 

IRS1 was found to indicate a slightly 

different pitch from IRS2 and IRS3, at 

the same actual airplane pitch attitude. 

A DCN embedded function was created 

to correct the very minor pitch 

difference between IRS1, IRS2, and 

IRS3. DCN software version 10.10.10 

implemented the new embedded 

function which computes a ‘‘PITCH_

DELTA correction factor’’ (pitch 

difference correction factor) between the 

IRS pitch angles being used by the 

PFDs. The system calculates pitch 

correction based in part on the IRS1 

pitch angle. If the IRS1 is lost, it causes 

the embedded function to invalidate the 

‘‘PITCH_DELTA output.’’ During this 

failure mode, the pitch attitude value 

freezes on the display for up to 20 

seconds, which results in temporarily 

incorrect pitch indications. The effect is 

evident only if the pitch of the airplane 

changes during the 20 second reset 

window. After 20 seconds, the system 

returns to normal. The standby flight 

display and heads up display are 

unaffected by this failure mode and 

continue to display the correct pitch 

attitude. 

There is not an alert or annunciation 

that informs the flight crew of a stale 

(frozen) pitch display or potentially 

misleading flight information. 

This condition, if not addressed, 

could result in loss of control of the 

airplane in certain phases of flight 

during instrument meteorological 

conditions. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Gulfstream GVII– 

G600 Aircraft Service Change No. 901, 

Initial Issue, dated May 12, 2020. This 

service document specifies procedures 

for installing the MOS software update 

part number EB60001034–0106 and 

operationally checking the installation. 

The FAA also reviewed Gulfstream 

GVII–G600 Aircraft Service Change No. 

020, Initial Issue, dated May 12, 2020. 

This service document specifies 

procedures for updating the DCN 

software level to version 10.10.12, 

updating system software in support of 

the MOS software update, and 

operationally checking the installation. 

This service information is reasonably 

available because the interested parties 

have access to it through their normal 

Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Proposed Rules 10877 

course of business or by the means 

identified in the ADDRESSES section. 

FAA’s Determination 

The FAA is issuing this NPRM after 

determining the unsafe condition 

described previously is likely to exist or 

develop in other products of the same 

type design. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require 

accomplishing the actions specified in 

the service information described 

previously. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 43 

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 

Update DNC software ............ 30 work-hours × $85 per hour = $2,550 ................................ $52 $2,602 $111,886 

Update MOS software ............ 10 work-hours × $85 per hour = $850 ................................... 52 902 38,786 

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 proposing 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 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: 

Gulfstream Aerospace Corporation: Docket 

No. FAA–2020–0994; Project Identifier 

AD–2020–00687–T. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by April 9, 

2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Gulfstream Aerospace 

Corporation Model GVII–G600 airplanes, 

serial numbers 73001 through 73043, 

certificated in any category. 

(d) Subject 

Joint Aircraft System Component Code 

3400, Navigation System. 

(e) Unsafe Condition 

This AD was prompted by reports of 

software causing pitch attitude value freezing 

on the Primary Flight Display (PFD) for up 

to 20 seconds. The FAA is issuing this AD 

to prevent a stale pitch display or potentially 

misleading flight information. The unsafe 

condition, if not addressed, could result in 

loss of control of the airplane in certain 

phases of flight during instrument 

meteorological conditions. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Update Software 

Within 24 months after the effective date 

of this AD, update the data concentration 

network and flight deck master operating 

system software by using the Modification 

Instructions, Steps III. A through I, in 

Gulfstream GVII–G600 Aircraft Service 

Change No. 901, Initial Issue, dated May 12, 

2020, concurrently with the Modification 

Instructions, Steps III. A through D, in 

Gulfstream GVII–G600 Aircraft Service 

Change No. 020, Initial Issue, dated May 12, 

2020. 

(h) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Atlanta ACO 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. 

(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 Myles Jalalian, Aviation Safety 

Engineer, Atlanta ACO Branch, FAA, 1701 

Columbia Avenue, College Park, GA 30337; 

phone: (404) 474–5572; fax: (404) 474–5606; 

email: myles.jalalian@faa.gov. 

(2) For service information identified in 

this AD, contact Gulfstream Aerospace 

Corporation, Technical Publications Dept., 

P.O. Box 2206, Savannah, GA 31402; phone: 

10878 Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Proposed Rules 

(800) 810–4853; email: pubs@

gulfstream.com; website: https://

www.gulfstream.com/en/customer-support/. 

You may view this referenced service 

information at the FAA, Airworthiness 

Products Section, Operational Safety Branch, 

901 Locust, Kansas City, Missouri 64106. For 

information on the availability of this 

material at the FAA, call (816) 329–4148. 

Issued on January 29, 2021. 

Gaetano A. Sciortino, 

Deputy Director for Strategic Initiatives, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2021–03483 Filed 2–22–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0022; Project 

Identifier MCAI–2020–00395–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 all 

Rolls-Royce Deutschland Ltd & Co KG 

(RRD) Trent XWB–75, Trent XWB–79, 

Trent XWB–79B, Trent XWB–84, and 

Trent XWB–97 model turbofan engines. 

This proposed AD was prompted by the 

manufacturer revising the time limits 

manual (TLM) to incorporate repairs to 

the low-pressure compressor (LPC) 

blades and introduce a new fan blade 

inspection. This proposed AD would 

require revisions to the airworthiness 

limitations section (ALS) of the RollsRoyce (RR) Trent XWB TLM and the 

operator’s existing approved aircraft 

maintenance program (AMP). 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 April 9, 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; email: https://

www.rolls-royce.com/contact-us/civilaerospace.aspx; 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–2021–0022; 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: 

Scott Stevenson, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 

District Avenue, Burlington, MA 01803; 

phone: (781) 238–7132; fax: (781) 238– 

7199; email: Scott.M.Stevenson@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–2021–0022; Project Identifier 

MCAI–2020–00395–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 Scott Stevenson, 

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 2020–0066, dated March 23, 2020 

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

address the unsafe condition on these 

products. The MCAI states: 

The Airworthiness Limitations Section 

instructions for Trent XWB engines, which 

are approved by EASA, are defined and 

published in TLM TRENTXWB–K0680– 

TIME0–01. These instructions have been 

identified as mandatory for continued 

airworthiness. 

Failure to accomplish these instructions 

could result in an unsafe condition. 

Rolls-Royce recently revised the TLM, 

introducing new and/or more restrictive 

instructions. 

For the reason described above, this 

[EASA] AD requires accomplishment of the 

instructions specified in the TLM, as defined 

in this AD. 

You may obtain further information 

by examining the MCAI in the AD 

docket at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2021–0022. 

FAA’s Determination 

This product has been approved by 

EASA and is approved for operation in 

the United States. Pursuant to our 

bilateral agreement with the European 

Community, EASA has notified the FAA