Federal Register / Vol. 86, No. 42 / Friday, March 5, 2021 / Rules and Regulations 12807 

(NARA). For information on the availability 

of this material at NARA, email fedreg.legal@

nara.gov, or go to: https://www.archives.gov/ 

federal-register/cfr/ibr-locations.html. 

Issued on February 9, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–04350 Filed 3–4–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0132; Project 

Identifier MCAI–2020–00947–E; Amendment 

39–21466; AD 2021–05–22] 

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: Final rule; request for 

comments. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Safran Helicopter Engines, S.A. (Safran 

Helicopter Engines) Arriel 1B, Arriel 1C, 

Arriel 1C2, Arriel 1D1, Astazou XIV B, 

and Astazou XIV H model turboshaft 

engines. This AD was prompted by the 

detection of positive segregation 

(freckles) on Stage 2 high-pressure 

turbine (HPT) disks and Stage 3 turbine 

wheels. This AD requires removal from 

service of certain Stage 2 HPT disks for 

Safran Helicopter Engines Arriel 1B, 1C, 

1C2, and 1D1 model turbofan engines 

and affected Stage 3 turbine wheels for 

Safran Helicopter Engines Astazou XIV 

B and XIV H model turbofan engines. 

The FAA is issuing this AD to address 

the unsafe condition on these products. 

DATES: This AD is effective March 22, 

2021. 

The FAA must receive comments on 

this AD by April 19, 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 final rule, contact Safran Helicopter 

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

Tarnos, France; phone: +33 (0) 5 59 74 

45 11. 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. It is also 

available at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2021–0132. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0132; 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 

final rule, the mandatory continuing 

airworthiness information (MCAI), any 

comments received, and other 

information. The street address for the 

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: 

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 2020–0151–E, dated July 9, 2020, for 

Safran Helicopter Engines Arriel 1B, 

Arriel 1C, Arriel 1C2, and Arriel 1D1 

model turboshaft engines, and AD 

2020–0161–E, dated July 17, 2020, for 

Safran Helicopter Engines Astazou XIV 

B and Astazou XIV H model turboshaft 

engines to address an unsafe condition 

for the specified products. EASA AD 

2020–0151–E states: 

Positive segregation (freckles) was detected 

on Stage 2 HP turbine discs manufactured 

from a certain block of material. Other parts 

manufactured from that same block of 

material may also be affected by this nonconformity. 

This condition, if not corrected, could lead 

to HP turbine disc failure and result in highenergy debris release, with consequent 

damage to, and reduced control of, the 

helicopter. 

To address this unsafe condition, SAFRAN 

issued the MSB, as defined in this [EASA] 

AD, to identify affected HP turbine discs and 

provide instructions for replacement. 

For the reason described above, this 

[EASA] AD requires replacement of affected 

parts with serviceable parts, and prohibits reinstallation of affected parts. 

EASA AD 2020–0161–E states: 

Positive segregation (freckles) was detected 

on Stage 3 turbine wheels manufactured from 

a certain block of material. Other parts 

manufactured from that same block of 

material may also be affected by this nonconformity. 

This condition, if not corrected, could lead 

to turbine wheel failure and result in highenergy debris release, with consequent 

damage to, and reduced control of, the 

helicopter. 

To address this unsafe condition, SAFRAN 

issued the MSB, as defined in this [EASA] 

AD, to identify affected turbine wheels and 

provide instructions for replacement. 

For the reason described above, this 

[EASA] AD requires replacement of affected 

parts with serviceable parts, and prohibits reinstallation of affected parts. 

You may obtain further information 

by examining the MCAIs in the AD 

docket at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2021–0132. 

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 us of 

the unsafe condition described in the 

MCAI. The FAA is issuing this AD 

because the agency evaluated all the 

relevant information provided by EASA 

and has determined that the unsafe 

condition described previously is likely 

to exist or develop in other products of 

the same type design. 

Related Service Information 

The FAA reviewed Safran Mandatory 

Service Bulletin (MSB) 292 72 0860, 

Version A, dated July 9, 2020 (MSB 292 

72 0860). MSB 292 72 0860 identifies 

affected Stage 2 HPT disks and 

describes procedures for removing and 

replacing affected Stage 2 HPT disks on 

Safran Helicopter Engines Arriel 1B, 

Arriel 1C, Arriel 1C2, and Arriel 1D1 

model turbofan engines. The FAA also 

reviewed Safran MSB 283 72 0814, 

Version A, dated July 16, 2020 (MSB 

283 72 0814). MSB 283 72 0814 

describes procedures for replacing the 

Stage 3 turbine wheel on Safran 

Helicopter Engines Astazou XIV B and 

Astazou XIV H model turbofan engines. 

AD Requirements 

This AD requires the removal from 

service and replacement of affected 

Stage 2 HPT disks for Safran Helicopter 

Engines Arriel 1B, Arriel 1C, Arriel 1C2, 

and Arriel 1D1 model turbofan engines. 


jbell on DSKJLSW7X2PROD with RULES
12808 Federal Register / Vol. 86, No. 42 / Friday, March 5, 2021 / Rules and Regulations 

This AD also requires the removal from 

service and replacement of each affected 

Stage 3 turbine wheel for Safran 

Helicopter Engines Astazou XIV B and 

Astazou XIV H model turbofan engines. 

Differences Between This AD and the 

MCAI or Service Information 

EASA AD 2020–0161–E requires 

operators to use Safran Helicopter 

Engines service information to perform 

the removal and replacement of affected 

Stage 2 HPT disks while this AD does 

not. 

Justification for Immediate Adoption 

and Determination of the Effective Date 

Section 553(b)(3)(B) of the 

Administrative Procedure Act (APA) (5 

U.S.C. 551 et seq.) authorizes agencies 

to dispense with notice and comment 

procedures for rules when the agency, 

for ‘‘good cause,’’ finds that those 

procedures are ‘‘impracticable, 

unnecessary, or contrary to the public 

interest.’’ Under this section, an agency, 

upon finding good cause, may issue a 

final rule without providing notice and 

seeking comment prior to issuance. 

Further, section 553(d) of the APA 

authorizes agencies to make rules 

effective in less than thirty days, upon 

a finding of good cause. 

The FAA has found the risk to the 

flying public justifies waiving notice 

and comment prior to adoption of this 

rule because no domestic operators use 

this product. It is unlikely that the FAA 

will receive any adverse comments or 

useful information about this AD from 

any U.S. operator. Accordingly, notice 

and opportunity for prior public 

comment are unnecessary, pursuant to 5 

U.S.C. 553(b)(3)(B). In addition, for the 

foregoing reason(s), the FAA finds that 

good cause exists pursuant to 5 U.S.C. 

553(d) for making this amendment 

effective in less than 30 days. 

Comments Invited 

The FAA invites you to send any 

written data, views, or arguments about 

this final rule. Send your comments to 

an address listed under ADDRESSES. 

Include Docket No. FAA–2021–0132 

and Project Identifier MCAI–2020– 

00947–E at the beginning of your 

comments. The most helpful comments 

reference a specific portion of the final 

rule, 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 final rule 

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 final rule. 

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 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. 

Regulatory Flexibility Act 

The requirements of the Regulatory 

Flexibility Act (RFA) do not apply when 

an agency finds good cause pursuant to 

5 U.S.C. 553 to adopt a rule without 

prior notice and comment. Because FAA 

has determined that it has good cause to 

adopt this rule without prior notice and 

comment, RFA analysis is not required. 

Costs of Compliance 

The FAA estimates that this AD 

affects 0 engines installed on helicopters 

of U.S. registry. 

The FAA estimates the following 

costs to comply with this AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Replace Stage 2 HPT disk ............................. 50 work-hours × $85 per hour = $4,250 ........ $30,000 $34,250 $0 

Replace Stage 3 turbine wheel ...................... 50 work-hours × $85 per hour = $4,250 ........ 237,000 241,250 0 

The FAA has included all known 

costs in its cost estimate. According to 

the manufacturer, however, some of the 

costs of this 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 

This AD will not have federalism 

implications under Executive Order 

13132. This AD will not have a 

substantial direct effect on the States, on 

the relationship between the national 

government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

and 

(2) Will not affect intrastate aviation 

in Alaska. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 


jbell on DSKJLSW7X2PROD with RULES
Federal Register / Vol. 86, No. 42 / Friday, March 5, 2021 / Rules and Regulations 12809 

The Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 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: 

2021–05–22 Safran Helicopter Engines, 

S.A. (Type Certificate previously held by 

Turbomeca, S.A.): Amendment 39– 

21466; Docket No. FAA–2021–0132; 

Project Identifier MCAI–2020–00947–E. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective March 22, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Safran Helicopter 

Engines (Type Certificate previously held by 

Turbomeca, S.A.): 

(1) Arriel 1B, Arriel 1C, Arriel 1C2, and 

Arriel 1D1 model turboshaft engines with a 

Stage 2 HPT disk part number (P/N) 

0292250400 and serial number (S/N) J915AD, 

J918AD, J919AD, J921AD, J923AD, J924AD, 

J926AD or J927AD, installed; and 

(2) Astazou XIV B and Astazou XIV H 

model turboshaft engines with a Stage 3 

turbine wheel P/N 0256257050 and S/N 

J276AD, J278AD, J279AD, J281AD, J282AD, 

J283AD or J287AD, installed. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 7250, Turbine Section. 

(e) Unsafe Condition 

This AD was prompted by the detection of 

positive segregation (freckles) on Stage 2 

high-pressure turbine (HPT) disks and Stage 

3 turbine wheels manufactured from a certain 

block of material. The FAA is issuing this AD 

to prevent failure of the HPT disk. The unsafe 

condition, if not addressed, could result in 

failure of the Stage 2 HPT disk and Stage 3 

turbine wheels, uncontained release of these 

parts, damage to the helicopter, and reduced 

control of the helicopter. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) For affected Safran Helicopter Engines 

Arriel 1B, Arriel 1C, Arriel 1C2 and Arriel 

1D1 model turboshaft engines, within 25 

flight hours (FHs) after the effective date of 

this AD, remove from service the Stage 2 HPT 

disk and replace with a part that is eligible 

for installation. 

(2) For affected Safran Helicopter Engines 

Astazou XIV B and Astazou XIV H model 

turboshaft engines, within 25 FHs after the 

effective date of this AD, remove from service 

the Stage 3 turbine wheel and replace with 

a part that is eligible for installation. 

(h) Definitions 

(1) For the purpose of this AD, a part 

eligible for installation on Safran Helicopter 

Engines Arriel 1B, Arriel 1C, Arriel 1C2, and 

Arriel 1D1 model turboshaft engines is a 

Stage 2 HPT disk that does not have P/N 

0292250400 and S/N J915AD, J918AD, 

J919AD, J921AD, J923AD, J924AD, J926AD or 

J927AD. 

(2) For the purpose of this AD, a part that 

is eligible for installation on Safran 

Helicopter Engines Astazou XIV B and 

Astazou XIV H model turboshaft engines is 

a Stage 3 turbine wheel that does not have 

P/N 0265257050 and S/N J276AD, J278AD, 

J279AD, J281AD, J282AD, J283AD, or 

J287AD. 

(i) 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. 

(j) 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 (EASA) AD 2020–0151–E, 

dated July 9, 2020, and EASA AD 2020– 

0161–E, dated July 17, 2020, for more 

information. You may examine the EASA 

ADs in the AD docket at https://

www.regulations.gov by searching for and 

locating Docket No. FAA–2021–0132. 

(k) Material Incorporated by Reference 

None. 

Issued on February 26, 2021. 

Gaetano A. Sciortino, 

Deputy Director for Strategic Initiatives, 

Compliance & Airworthiness Division, 

Aircraft Certification Service. 

[FR Doc. 2021–04454 Filed 3–4–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0133; Project 

Identifier AD–2021–00234–T; Amendment 

39–21469; AD 2021–06–03] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all The 

Boeing Company Model 777F series 

airplanes. This AD was prompted by a 

report of a water supply line that 

detached at a certain joint located above 

an electronic equipment (EE) cooling 

filter, leading to water intrusion into the 

forward EE bay. This AD requires 

deactivating the potable water system. 

The FAA is issuing this AD to address 

the unsafe condition on these products. 

DATES: This AD is effective March 5, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of March 5, 2021. 

The FAA must receive comments on 

this AD by April 19, 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 final rule, contact Boeing 

Commercial Airplanes, Attention: 

Contractual & Data Services (C&DS), 

2600 Westminster Blvd., MC 110–SK57, 

Seal Beach, CA 90740–5600; telephone 

562–797–1717; internet https://

www.myboeingfleet.com. You may view 

this service information at the FAA, 

Airworthiness Products Section, 

Operational Safety Branch, 2200 South 

216th St., Des Moines, WA. For 

information on the availability of this 


jbell on DSKJLSW7X2PROD with RULES