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Federal Register / Vol. 86, No. 46 / Thursday, March 11, 2021 / Rules and Regulations 2200 South 216th St., Des Moines, WA
98198; telephone and fax 206231
3218; email kathleen.arrigotti@faa.gov.
SUPPLEMENTARY INFORMATION:

of certain publications listed in this AD
as of April 15, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain other publication listed in this AD as of October 22, 2018 83 FR
46862, September 17, 2018.
ADDRESSES: For EASA material incorporated by reference IBR in this AD, contact the EASA, KonradAdenauer-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. For Airbus Helicopters service information identified in this final rule, contact Airbus Helicopters, 2701 N Forum Drive, Grand Prairie, TX 75052;
telephone 972 6410000 or 800 232
0323; fax 972 6413775; or at https
www.helicopters.airbus.com/website/
en/ref/Technical-Support_73.html. 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. FAA2020
1018.

Discussion
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. FAA2020
1018; 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:
Kathleen Arrigotti, Aviation Safety Engineer, Large Aircraft Section, International Validation Branch, FAA,
The EASA, which is the Technical Agent for the Member States of the European Union, has issued EASA AD
20190080, dated April 3, 2019 EASA
AD 20190080 also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI, to correct an unsafe condition for all Airbus Helicopters Model AS365N2, AS 365
N3, EC 155B, EC155B1, SA365N, and SA365N1 helicopters.
The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 to supersede AD 20181901, Amendment 3919401 83 FR 46862, September 17, 2018 AD 20181901.
AD 20181901 applied to all Airbus Helicopters Model AS 365N2, AS 365
N3, EC 155B, EC155B1, SA365N1, and SA366G1 helicopters. The NPRM
published in the Federal Register on November 10, 2020 85 FR 71580. The NPRM was prompted by a determination that Model SA365N
helicopters are also affected by the unsafe condition identified in AD 2018
1901. The NPRM proposed to continue to require repetitive inspections and add Model SA365N helicopters, as specified in an EASA AD.
The FAA is issuing this AD to address disbonding of the aft fuselage outer skin.
This condition could result in loss of aft fuselage structural integrity and subsequent loss of control of the helicopter. See the MCAI for additional background information.

editorial changes. The FAA has determined that these minor changes:
Are consistent with the intent that was proposed in the NPRM for addressing the unsafe condition; and Do not add any additional burden upon the public than was already proposed in the NPRM.
Related Service Information Under 1
CFR Part 51
EASA AD 20190080 describes procedures for repetitive inspections of the aft fuselage outer skin for Model AS365N2, AS 365 N3, EC 155B, EC155B1, SA365N, and SA365N1
helicopters.
Airbus Helicopters Alert Service Bulletin ASB No. SA36605.48, Revision 1, dated March 27, 2019, describes procedures for repetitive inspections of the aft fuselage outer skin for Model SA366G1 helicopters.
This AD also requires Airbus Helicopters ASB No. SA36605.48, Revision 0, dated July 21, 2017, which the Director of the Federal Register approved for incorporation by reference as of October 22, 2018 83 FR 46862, September 17, 2018.
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 MCAI

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.

The applicability of EASA AD 2019
0080 does not include Airbus Helicopters Model SA366G1
helicopters. Those helicopters are no longer listed on the EASA type certificate data sheet TCDS; however, they are still listed on the U.S. TCDS
and are affected by the unsafe condition.
Therefore, the FAA has included Airbus Helicopters Model SA366G1
helicopters in the applicability of this AD.

Conclusion
Costs of Compliance
The FAA reviewed the relevant data and determined that air safety and the public interest require adopting this final rule as proposed, except for minor
The FAA estimates that this AD
affects 52 helicopters of U.S. registry.
The FAA estimates the following costs to comply with this AD:

Comments
khammond on DSKJM1Z7X2PROD with RULES

ESTIMATED COSTS FOR REQUIRED ACTIONS
Labor cost
Parts cost
Cost per product
Cost on U.S.
operators
4 work-hours $85 per hour = $340

$0

$340

$17,680

The FAA estimates the following costs to do any necessary on-condition actions that would be required based on
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the results of any required actions. The FAA has no way of determining the
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number of helicopters that might need these on-condition actions:

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