11662 Federal Register / Vol. 86, No. 37 / Friday, February 26, 2021 / Proposed Rules 

Service Bulletin No. 05A050, Revision 1, 

dated April 3, 2019; describe procedures for 

cleaning and lubricating each bellcrank and 

pivot link of the life raft inflation cylinder 

percussion system and removing any 

corrosion. 

(i) New Requirement of This AD: Bellcrank 

Replacement 

For Group 1: Within 6 months after the 

effective date of this AD, or before the next 

operation over water, whichever occurs first, 

replace each affected bellcrank with a 

serviceable part, as defined in paragraph 

(g)(4) of this AD, in accordance with 

Paragraph 3.B.2. of the Accomplishment 

Instructions of Airbus Helicopters Alert 

Service Bulletin EC225–25A211, Revision 1, 

dated October 23, 2019; except where the 

service information specifies to remove and 

scrap certain parts, this AD requires 

removing those parts from service instead. 

(j) Terminating Action for Repetitive Actions 

Required by Paragraph (h) of This AD 

Accomplishment of the bellcrank 

replacement required by paragraph (i) of this 

AD is terminating action for the repetitive 

actions required by paragraph (h) of this AD 

for that helicopter only. 

(k) Parts Installation Limitation 

(1) For Group 1: After the replacement 

required by paragraph (i) of this AD is done, 

only a serviceable part, as defined in 

paragraph (g)(4) of this AD, is allowed to be 

installed on that helicopter. 

(2) For Group 2: As of the effective date of 

this AD, only a serviceable part, as defined 

in paragraph (g)(4) of this AD, is allowed to 

be installed on any helicopter. 

(l) Special Flight Permit 

Special flight permits, as described in 14 

CFR 21.197 and 21.199, are not allowed. 

(m) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Strategic Policy 

Rotorcraft Section, 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 Strategic Policy 

Rotorcraft Section, send it to: Manager, 

Strategic Policy Rotorcraft Section, FAA, 

10101 Hillwood Pkwy., Fort Worth, TX 

76177; telephone 817–222–5110. Information 

may be emailed to: 9-ASW-FTW-AMOCRequests@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. 

(n) Related Information 

(1) For more information about this AD, 

contact Blaine Williams, Aviation Safety 

Engineer, Los Angeles ACO Branch, 3960 

Paramount Boulevard, Lakewood, CA 90712– 

4137; telephone 562–627–5371; email 

blaine.willaims@faa.gov. 

(2) For service information identified in 

this AD, contact Airbus Helicopters, 2701 N 

Forum Drive, Grand Prairie, TX 75052; 

telephone 972–641–0000 or 800–232–0323; 

fax 972–641–3775; or at https://

www.airbus.com/helicopters/services/ 

technical-support.html. 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. 

Issued on January 28, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–03666 Filed 2–25–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0100; Project 

Identifier MCAI–2020–00309–E] 

RIN 2120–AA64 

Airworthiness Directives; Safran 

Helicopter Engines, S.A. (Type 

Certificate Previously Held by 

Turbomeca, S.A.) Turboshaft 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 

Safran Helicopter Engines, S.A. Arriel 

2C and Arriel 2S1 model turboshaft 

engines. This proposed AD was 

prompted by reports of error messages 

on the full authority digital engine 

control (FADEC) B digital engine control 

unit (DECU), caused by blistering of the 

varnish on the DECU circuit board. This 

proposed AD would require the 

replacement of certain FADEC B DECUs. 

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 12, 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 Safran Helicopter 

Engines, S.A., Avenue du 1er Mai, 

40220 Tarnos, France; phone: +33 (0) 5 

59 74 40 00. 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–2021–0100; 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: 

Wego Wang, Aviation Safety Engineer, 

ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: 

(781) 238–7134; fax: (781) 238–7199; 

email: wego.wang@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–2021–0100; 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. 


khammond on DSKJM1Z7X2PROD with PROPOSALS
Federal Register / Vol. 86, No. 37 / Friday, February 26, 2021 / Proposed Rules 11663 

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 Wego Wang, 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 2020–0046, dated March 4, 2020 

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

address the unsafe condition on these 

products. The MCAI states: 

Occurrences have been reported of FADEC 

B DECU error messages, which were found to 

be caused by blistering of the varnish on the 

DECU circuit board. Subsequent 

investigation determined that the use of a 

non-compliant primer is related to the 

blistering effect which, in wet conditions, 

can cause malfunction of the stepper motor. 

This condition, if not corrected, could lead 

to loss of automatic control on both engines 

concurrently, possibly resulting in reduced 

control of the helicopter. 

To address this potentially unsafe 

condition, SAFRAN issued the MSB, as 

defined in this [EASA] AD, to provide 

instructions for identification and 

replacement of affected parts. 

For the reason described above, this 

[EASA] AD requires replacement of affected 

parts with serviceable parts. This [EASA] AD 

also prohibits (re-)installation of affected 

parts. 

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–2021–0100. 

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 

of the unsafe condition described in the 

MCAI and service information. The 

FAA is issuing this NPRM because the 

agency evaluated all the relevant 

information provided by EASA and 

determined the unsafe condition 

described previously is likely to exist or 

develop on other products of the same 

type design. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Safran Helicopter 

Engines Note Technique AA187866, 

Version A, dated October 18, 2019. This 

service information identifies the serial 

numbers (S/Ns) of certain FADEC B 

DECUs installed on Arriel 2C and Arriel 

2S1 model turboshaft engines. 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. 

Other Related Service Information 

The FAA reviewed Safran Helicopter 

Engines Mandatory Service Bulletin 

(MSB) No. 292 73 2872, Version A, 

dated October 17, 2019. This MSB 

describes procedures for identifying the 

S/Ns of certain FADEC B DECUs and 

replacing certain FADEC B DECUs on 

Arriel 2C and Arriel 2S1 model 

turboshaft engines. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require the 

replacement of certain FADEC B DECUs 

installed on Safran Helicopter Engines 

Arriel 2C and Arriel 2S1 model 

turboshaft engines. 

Differences Between This Proposed AD 

and the MCAI or Service Information 

Safran Helicopter Engines MSB No. 

292 73 2872 is applicable to Arriel 2C, 

2 C–PM, and Arriel 2S1 model 

turboshaft engines. This proposed AD is 

only applicable to Arriel 2C and Arriel 

2S1 model turboshaft engines. There is 

no Arriel 2 C–PM model turboshaft 

engine type certificated in the United 

States. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 148 

engines installed on helicopters 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 

Replace the FADEC B DECU ........................ 1 work-hour × $85 per hour = $85 ................. $0 $85 $12,580 

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 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, 


khammond on DSKJM1Z7X2PROD with PROPOSALS
11664 Federal Register / Vol. 86, No. 37 / Friday, February 26, 2021 / Proposed Rules 

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: 

Safran Helicopter Engines, S.A. (Type 

Certificate Previously Held by 

Turbomeca, S.A.): Docket No. FAA– 

2021–0100; Project Identifier MCAI– 

2020–00309–E. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by April 12, 

2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Safran Helicopter 

Engines, S.A. (Type Certificate previously 

held by Turbomeca, S.A.) Arriel 2C and 

Arriel 2S1 model turboshaft engines. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7321, Fuel Control/Turbine Engines. 

(e) Unsafe Condition 

This AD was prompted by reports of error 

messages of the full authority engine control 

(FADEC) B digital engine control unit 

(DECU), caused by blistering of the varnish 

on the DECU circuit board. The FAA is 

issuing this AD to prevent failure of the 

FADEC B DECU. The unsafe condition, if not 

addressed, could result in loss of engine 

thrust control and reduced control of the 

helicopter. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

For affected engines having an installed 

FADEC B DECU with a serial number (S/N) 

identified in Safran Helicopter Engines Note 

Technique AA187866, Version A, dated 

October 18, 2019 (the Note Technique), 

within 1,400 engine operating hours after the 

effective date of this AD, replace the FADEC 

B DECU with a part eligible for installation. 

(h) Installation Prohibition 

After the effective date of this AD, do not 

install onto any engine a FADEC B DECU 

having an S/N listed in the Note Technique. 

(i) Definition 

For the purpose of this AD, a part eligible 

for installation is a FADEC B DECU that does 

not have an S/N listed in the Note 

Technique. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, ECO 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 ECO Branch, send it to 

the attention of the person identified in 

Related Information. You may email your 

request 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. 

(k) Related Information 

(1) For more information about this AD, 

contact Wego Wang, Aviation Safety 

Engineer, ECO Branch, FAA, 1200 District 

Avenue, Burlington, MA 01803; phone: (781) 

238–7134; fax: (781) 238–7199; email: 

wego.wang@faa.gov. 

(2) Refer to European Union Aviation 

Safety Agency AD 2020–0046, dated March 

4, 2020, for more information. You may 

examine the EASA AD in the AD docket at 

https://www.regulations.gov by searching for 

and locating it in Docket No. FAA–2021– 

0100. 

(3) For service information identified in 

this AD, contact Safran Helicopter Engines, 

S.A., Avenue du 1er Mai, 40220 Tarnos, 

France; phone: +33 (0) 5 59 74 40 00. You 

may view this referenced 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. 

Issued on February 18, 2021. 

Ross Landes, 

Deputy Director for Regulatory Operations, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2021–03777 Filed 2–25–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0125; Project 

Identifier MCAI–2020–01366–T] 

RIN 2120–AA64 

Airworthiness Directives; Airbus SAS 

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 Airbus SAS Model A350–941 

and –1041 airplanes. This proposed AD 

was prompted by a determination that 

new or more restrictive airworthiness 

limitations are necessary. This proposed 

AD would require revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations, as 

specified in a European Union Aviation 

Safety Agency (EASA) AD, which is 

proposed for incorporation by reference. 

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 12, 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 material that will be incorporated 

by reference (IBR) in this AD, contact 

the EASA, Konrad-Adenauer-Ufer 3, 

50668 Cologne, Germany; telephone +49 

221 8999 000; email ADs@

easa.europa.eu; internet 

www.easa.europa.eu. You may find this 

IBR material on the EASA website at 

https://ad.easa.europa.eu. You may 

view this IBR material at the FAA, 

Airworthiness Products Section, 

Operational Safety Branch, 2200 South 

216th St., Des Moines, WA. For 

information on the availability of this 

material at the FAA, call 206–231–3195. 


khammond on DSKJM1Z7X2PROD with PROPOSALS