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Federal Register / Vol. 86, No. 110 / Thursday, June 10, 2021 / Rules and Regulations b Affected Airworthiness Directives ADs None.
c Applicability This AD applies to Airbus Helicopters Model EC 155B, EC155B1, SA365N, SA
365N1, AS365N2, and AS 365 N3
helicopters, certificated in any category, as identified in European Aviation Safety Agency now European Union Aviation Safety Agency EASA AD 20190008, dated January 22, 2019 EASA AD 20190008.
d Subject Joint Aircraft System Component JASC
Code: 7110, Engine Cowling System.
e Reason This AD was prompted by a report of an in-flight loss of main gearbox MGB and engine cowlings. The FAA is issuing this AD
to address a failure of the MGB fixed cowling front fitting, and subsequent MGB cowling or engine cowling detachment, which could result in damage to the helicopter, loss of helicopter control, and possible injury to persons on the ground.
f Compliance Comply with this AD within the compliance times specified, unless already done.

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g Requirements Except as specified in paragraph h of this AD: Comply with all required actions and compliance times specified in, and in accordance with, EASA AD 20190008.
h Exceptions to EASA AD 20190008
1 Where EASA AD 20190008 refers to April 14, 2017 the effective date of EASA
AD 20170055, dated March 31, 2017, this AD requires using the effective date of this AD.
2 Where EASA AD 20190008 refers to its effective date, this AD requires using the effective date of this AD.
3 Where EASA AD 20190008 refers to flight hours FH, this AD requires using hours time-in-service.
4 Where EASA AD 20190008 requires the modification within 660 flight hours or 23 months, whichever occurs first, this AD
requires the modification within 660 hours time-in-service instead.
5 Although the service information referenced in EASA AD 20190008 specifies to discard certain parts, this AD requires removing those parts from service instead.
6 Where the service information referenced in EASA AD 20190008 specifies to use tooling, equivalent tooling may be used.
7 The Remarks section of EASA AD
20190008 does not apply to this AD.
8 Where paragraph 1 of EASA AD 2019
0008 states to, inspect the MGB fixed cowling front fittings in accordance with the instructions of paragraph 1.E.2 of the applicable inspection ASB or in accordance with the instructions of the applicable modification ASB, this AD requires determining if Airbus Helicopters Alert Service Bulletin No. 53.00.55, Revision 0, dated March 13, 2017, or Revision 1, dated December 20, 2018, has or has not been
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complied with and following the instructions, For helicopters on which ALERT SERVICE BULLETIN No. 53.00.55
has not been complied with or For helicopters on which ALERT SERVICE
BULLETIN No. 53.00.55 has been complied with, as applicable, in paragraph 1.E.2, of Airbus Helicopters Alert Service Bulletin ASB No. AS36553.00.62 or ASB No. EC155
53A038, each Revision 0 and dated December 20, 2018 ASB AS36553.00.62 or ASB
EC15553A038, as applicable to your model helicopter.
9 Where paragraph 2 of EASA AD 2019
0008 states to, accomplish the applicable corrective actions in accordance with paragraph 1.E.2 of the applicable inspection ASB or in accordance with the instructions of the applicable modification ASB, this AD
requires accomplishing the applicable corrective actions by following ASB AS365
53.00.62 or ASB EC15553A038, as applicable to your model helicopter.
10 Where paragraph 3.B.2.e.3 of the applicable modification ASB referenced in EASA AD 20190008 refers to paragraph 3.B.e.3, this AD requires referring to paragraph 3.B.3 of ASB AS36553.00.62 or ASB EC15553A038, as applicable to your model helicopter.
i Special Flight Permit Special flight permits, as described in 14
CFR 21.197 and 21.199, are not allowed.
j Alternative Methods of Compliance AMOCs 1 The Manager, International Validation 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 International Validation Branch, send it to the attention of the person identified in paragraph k of this AD.
Information may be emailed to: 9-AVS-AIR730-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.

ii Airbus Helicopters Alert Service Bulletin ASB No. AS36553.00.62, Revision 0, dated December 20, 2018.
iii Airbus Helicopters Alert Service Bulletin ASB No. EC15553A038, Revision 0, dated December 20, 2018.
3 For EASA AD 20190008, 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 EASA AD on the EASA website at https
ad.easa.europa.eu. For Airbus Helicopters service information, contact Airbus Helicopters, 2701 N Forum Drive, Grand Prairie, TX 75052; telephone 972 6410000
or 800 2320323; fax 972 6413775; or at https www.airbus.com/helicopters/services/
technical-support.html.
4 You may view this service information 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 817 2225110.
This material may be found in the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA20201183.
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 May 11, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202112037 Filed 6921; 8:45 am BILLING CODE 491013P

DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39
Docket No. FAA20201074; Project Identifier MCAI202001257A; Amendment 3921574; AD 20211112

k Related Information For more information about this AD, contact Blaine Williams, Aerospace Engineer, Los Angeles ACO Branch, Compliance &
Airworthiness Division, 3960 Paramount Blvd., Lakewood, California 90712; telephone 562 6275227; email blaine.williams@
faa.gov.

RIN 2120AA64

l 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 this AD specifies otherwise.
i European Aviation Safety Agency EASA AD 20190008, dated January 22, 2019.

SUMMARY:

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Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
AGENCY:

The FAA is adopting a new airworthiness directive AD for certain Pilatus Aircraft Ltd. Pilatus Model PC
24 airplanes. This AD results from mandatory continuing airworthiness information MCAI originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI
identifies the unsafe condition as the engine attachment hardware not
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