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Federal Register / Vol. 86, No. 171 / Wednesday, September 8, 2021 / Rules and Regulations
the internet at https www.regulations.gov by searching for and locating Docket No.
FAA 20210607.
5 You may view this material 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 July 21, 2021.
Gaetano A. Sciortino, Deputy Director for Strategic Initiatives, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202119248 Filed 9721; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210380; Project Identifier MCAI202001683R; Amendment 3921672; AD 20211610
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 certain Airbus Helicopters Deutschland GmbH
Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters.
This AD was prompted by a report that geometrical non-conformities were found in the root section of the tail rotor blade TRB. This AD requires a onetime inspection dimensional check of the TRB for conformity and, depending on the findings, replacement of certain affected parts, as specified in a European Union Aviation Safety Agency EASA AD, which is incorporated by reference. This AD also prohibits rework, repair, or modification of affected parts in the affected area of the TRB assembly root. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective October 13, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of October 13, 2021.
ADDRESSES: For material incorporated by reference IBR in this AD, contact the EASA, Konrad-Adenauer-Ufer 3, 50668 Cologne, Germany; telephone +49

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SUMMARY:

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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 material at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call 8172225110.
It is also available in the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0380.
Examining the AD Docket You may examine the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0380; 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, any comments received, and other information. The address for Docket Operations is U.S. Department of Transportation, Docket Operations, M30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:
Andrea Jimenez, Aerospace Engineer, COS Program Management Section, Operational Safety Branch, Compliance & Airworthiness Division, FAA, 1600
Stewart Ave., Mail Stop: Room 410, Westbury, NY 11590; telephone 516
2287330; email andrea.jimenez@
faa.gov.
SUPPLEMENTARY INFORMATION:

Background The EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD
20200282, dated December 17, 2020
EASA AD 20200282 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for Airbus Helicopters Deutschland GmbH Model EC135 P1, EC135 P2, EC135 P2+, EC135 P3, EC135 T1, EC135
T2, EC135 T2+, EC135 T3, EC635 P2+, EC635 P3, EC635 T1, EC635 T2+, and EC635 T3 helicopters, all variants, all serial numbers. Model EC635 P2+, EC635 P3, EC635 T1, EC635 T2+, and EC635 T3 helicopters are not certificated by the FAA and are not included on the U.S. type certificate data sheet, except where the U.S. type certificate data sheet explains that the Model EC635T2+ helicopter having serial number 0858 was converted from
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Model EC635T2+ to Model EC135T2+.
This AD, therefore, does not include Model EC635 P2+, EC635 P3, EC635 T1, EC635 T2+, and EC635 T3 helicopters in the applicability.
Furthermore, although EASA AD
20200282 applies to all Model EC135
P1, EC135 P2, EC135 P2+, EC135 P3, EC135 T1, EC135 T2, EC135 T2+, and EC135 T3 helicopters, this AD applies to helicopters with an affected part installed instead.
The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to certain Airbus Helicopters Deutschland GmbH Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters. The NPRM
published in the Federal Register on June 1, 2021 86 FR 29216. The NPRM
was prompted by a report that during an investigation related to an accident on an Airbus Helicopters Model EC130B4
helicopter, geometrical nonconformities were observed in the TRB
root section. EASA issued AD 2020
0187, dated August 21, 2020, to address this issue on Model EC130B4 and EC130T2 helicopters and the FAA
issued corresponding AD 20211025, Amendment 3921558 86 FR 29176, June 1, 2021. The Airbus Helicopters Deutschland GmbH Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters have a similar design and production requirements to the affected Model EC130B4 helicopter, and an inspection of the affected parts detected geometrical non-conformities in some instances. The NPRM proposed to require a one-time inspection dimensional check of the TRB for conformity and, depending on the findings, replacement of certain affected parts, as specified in EASA AD 2020
0282. The NPRM also proposed to prohibit rework, repair, or modification of affected parts in the affected area of the TRB assembly root.
The FAA is issuing this AD to address geometrical non-conformities in the TRB root section, which could lead to crack initiation and consequent blade failure, resulting in loss of control of the helicopter. See the MCAI for additional background information.
Comments The FAA gave the public the opportunity to participate in developing this final rule. The FAA received no comments on the NPRM or on the determination of the cost to the public.

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