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Federal Register / Vol. 86, No. 46 / Thursday, March 11, 2021 / Rules and Regulations 3 Will 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 Amendment Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:
PART 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by adding the following new airworthiness directive:

20210508 Safran Helicopter Engines, S.A. Type Certificate previously held by Turbomeca, S.A.: Amendment 39
21451; Docket No. FAA20201118;
Project Identifier MCAI202000516E.

b Affected ADs None.

i Alternative Methods of Compliance AMOCs
c Applicability This AD applies to all Safran Helicopter Engines, S.A. Type Certificate previously held by Turbomeca, S.A. Arriel 2C, 2C1, 2S1, and 2S2 model turboshaft engines.
d Subject Joint Aircraft System Component JASC
Code 7712, Engine BMEP/Torque Indicating.

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e Unsafe Condition This AD was prompted by investigations by the manufacturer following level 1 failures in flight minor anomalies and level 2
failures on the ground minor failures, where cracks were found on the soldered joints of torque conformation boxes. The FAA is issuing this AD to prevent failure of the torque conformation box. The unsafe condition, if not addressed, could result in failure of the engine, in-flight shutdown, and loss of the helicopter.
f Compliance Comply with this AD within the compliance times specified, unless already done.
g Required Actions 1 For engines with the torque conformation box in pre-modification TU 34
configuration, installed on Arriel 2C and 2C1
model turboshaft engines; pre-modification
16:13 Mar 10, 2021

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h Definition For the purpose of this AD, a part eligible for installation is a zero hour torque conformation box or a torque conformation box that has been inspected as required by paragraph g1 of this AD.

a Effective Date This airworthiness directive AD is effective April 15, 2021.

VerDate Sep<11>2014

TU 34 or post-modification TU 188
configuration, installed on Arriel 2S1 model turboshaft engines; or post-modification TU
188 configuration, installed on Arriel 2S2
model turboshaft engines:
i Within 600 engine hours EHs or 180
days after the effective date of this AD, whichever occurs first, perform an initial inspection of the resistance values of the torque conformation box.
Note 1 to paragraph g1i: You may delay the initial inspection by up to 60 EHs to align with other scheduled maintenance tasks.
ii Thereafter, perform repetitive inspections of the resistance values of the torque conformation box before exceeding 600 EHs since the last inspection of the resistance values of the torque conformation box.
2 Use the Accomplishment Instructions, paragraph 2.3.2 or 4.3.2, of Safran Helicopter Engines Mandatory Service Bulletin No. 292
72 2868, Version A, dated December 2018, to perform the inspections of the resistance values of the torque conformation box required by paragraph g1 of this AD.
3 If, during any inspection required by paragraph g1 of this AD, a non-conforming resistance value is found, before further flight, remove the torque conformation box from service and replace it with a part eligible for installation.

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 certification office, 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
2387134; fax: 781 2387199; email:
wego.wang@faa.gov.
2 Refer to European Union Aviation Safety Agency EASA AD 20190110, dated May 21, 2019, for more information. You may examine the EASA AD in the AD docket at https www.regulations.gov by searching for and locating Docket No. FAA20201118.

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k Material Incorporated by Reference 1 The Director of the Federal Register approved the incorporation by reference IBR of the service information listed in this paragraph under 5 U.S.C. 552a and 1 CFR
part 51.
2 You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise.
i Safran Helicopter Engines Mandatory Service Bulletin No. 292 72 2868, Version A, dated December 2018.
ii Reserved 3 For Safran Helicopter Engines service information identified in this AD, contact Safran Helicopter Engines, S.A., Avenue du 1er Mai, Tarnos, France; phone: +33 0 5 59
74 45 11.
4 You may view this service information at 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 2387759.
5 You may view this service information that is incorporated by reference at the National Archives and Records Administration 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 19, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202105046 Filed 31021; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20200967; Product Identifier 2018SW013AD; Amendment 3921394; AD 20210211
RIN 2120AA64

Airworthiness Directives; Airbus Helicopters Deutschland GmbH
Helicopters Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for Airbus Helicopters Deutschland GmbH Model MBBBK117 A1, MBBBK117 A3, MBBBK117 A4, MBBBK117 B1, MBBBK117 B2, MBBBK117 C1, and MBBBK117 C2 helicopters. This AD requires inspecting the tail gearbox TGB bellcrank attachment arm arm for a crack. This AD was prompted by a report of a cracked TGB arm. The actions of this AD are intended to address an unsafe condition on these products.

SUMMARY:

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