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Rules and Regulations
Federal Register Vol. 86, No. 111
Friday, June 11, 2021

This section of the FEDERAL REGISTER
contains regulatory documents having general applicability and legal effect, most of which are keyed to and codified in the Code of Federal Regulations, which is published under 50 titles pursuant to 44 U.S.C. 1510.
The Code of Federal Regulations is sold by the Superintendent of Documents.

Examining the AD Docket
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20210199; Project Identifier MCAI202100016R;Amendment 3921579; AD 20211117
RIN 2120AA64

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

The FAA is adopting a new airworthiness directive AD for Airbus Helicopters Deutschland GmbH AHD
Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3 helicopters.
This AD was prompted by a report of increased control force in the collective axis. This AD requires a one-time visual inspection of the main rotor actuator MRA, as specified in a European Aviation Safety Agency now European Union Aviation Safety Agency EASA
AD, which is incorporated by reference.
The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective July 16, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of July 16, 2021.
ADDRESSES: For material 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 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,
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SUMMARY:

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Fort Worth, TX 76177. For information on the availability of this material at the FAA, call 817 2225110. It is also available in the AD docket on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20210199.
You may examine the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0199; 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, M
30, West Building Ground Floor, Room W12140, 1200 New Jersey Avenue SE, Washington, DC 20590.
FOR FURTHER INFORMATION CONTACT:
Katherine Venegas, Aviation Safety Engineer, Los Angeles ACO Branch, FAA, 3960 Paramount Blvd., Lakewood, California 90712; telephone 562 627
5353; email katherine.venegas@faa.gov.
SUPPLEMENTARY INFORMATION:
Background EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD 20180284, dated December 20, 2018 EASA AD
20180284, to correct an unsafe condition for Airbus Helicopters Deutschland GmbH AHD 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.
Model EC635 P2+, EC635 P3, EC635 T1, and EC635 T3 helicopters are not certificated by the FAA and are not included on the U.S. type certificate data sheet; this AD therefore does not include those helicopters in the applicability.
The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to Model EC135P1, EC135P2, EC135P2+, EC135P3, EC135T1, EC135T2, EC135T2+, and EC135T3
helicopters. The NPRM published in the Federal Register on March 30, 2021 86
FR 16550. The NPRM was prompted by a report of increased control force in the collective axis on an AHD Model EC135

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helicopter. Subsequent inspections determined that a nut on a piston of the MRA had cracked and separated from the piston rod. The NPRM proposed to require a one-time visual inspection of the MRA, as specified in an EASA AD.
The FAA is issuing this AD to prevent failure of the MRA and subsequent loss of control of the helicopter. See EASA
AD 20180284 for additional background information.
Discussion of Final Airworthiness Directive 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.
Conclusion The FAA reviewed the relevant data and determined that air safety and the public interest require adopting this final rule as proposed.
Related Service Information Under 1
CFR Part 51
EASA AD 20180284 describes procedures for a one-time visual inspection of the MRA and depending on the results, replacing the affected parts.
This material is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section.
Differences Between This AD and the EASA AD
The EASA AD requires contacting Airbus Helicopters or replacing an affected part, whereas this AD requires performing the corrective action in accordance with FAA-approved procedures or removing the affected parts from service instead. Where the EASA AD specifies a compliance time for the inspection in terms of calendar time or flight hours, this AD requires a compliance time in terms of hours timein-service instead. Where the EASA AD
specifies a compliance time of 15 days for reporting the inspection results, this AD requires that the findings be reported within 30 days.
Interim Action The FAA considers this AD interim action. If final action is later identified,
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