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Federal Register / Vol. 86, No. 33 / Monday, February 22, 2021 / Rules and Regulations e Required Actions
DEPARTMENT OF TRANSPORTATION

1 Within 50 hours time-in-service or 3
months, whichever occurs first, remove any Ti-bolt identified in paragraph a of this AD, located on the forward tail rotor drive shaft, from service.
2 As of the effective date of this AD, do not install a Ti-bolt identified in paragraph a of this AD on the forward tail rotor drive shaft of any helicopter.

14 CFR Part 39
Docket No. FAA20200849; Project Identifier MCAI202001036A; Amendment 3921374; AD 20202619
RIN 2120AA64

f Alternative Methods of Compliance AMOCs
Airworthiness Directives; Pilatus Aircraft Ltd. Airplanes
1 The Manager, Strategic Policy Rotorcraft Section, FAA, may approve AMOCs for this AD. Send your proposal to:
Manager, Strategic Policy Rotorcraft Section, FAA, 10101 Hillwood Pkwy., Fort Worth, TX
76177; telephone 8172225110; email 9ASW-FTW-AMOC-Requests@faa.gov.
2 For operations conducted under a 14
CFR part 119 operating certificate or under 14 CFR part 91, subpart K, the FAA suggests that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office, before operating any aircraft complying with this AD through an AMOC.

AGENCY:

g Additional Information 1 Airbus Helicopters Alert Service Bulletin ASB No. EC13500A001 and ASB
No. EC135H00A001, each Revision 1 and dated September 2, 2019, which are not incorporated by reference, contain additional information about the subject of this AD. For service information identified in this AD, contact Airbus Helicopters, 2701 N. Forum Drive, Grand Prairie, TX 75052; telephone 9726410000 or 8002320323; fax 972
6413775; or at https www.airbus.com/
helicopters/services/technical-support.html.
You may view a copy of the service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101
Hillwood Pkwy, Room 6N321, Fort Worth, TX 76177.
2 The subject of this AD is addressed in European Union Aviation Safety Agency EASA AD No. 20190199, dated August 16, 2019. You may view the EASA AD on the internet at https www.regulations.gov in Docket No. FAA20201037.
h Subject Joint Aircraft Service Component JASC
Code: 1430, Fasteners; and 6510, Tail Rotor Drive Shaft.

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Federal Aviation Administration
Issued on January 22, 2021.
Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service.
FR Doc. 202101848 Filed 21921; 8:45 am BILLING CODE 491013P

Federal Aviation Administration FAA, DOT.
ACTION: Final rule.
The FAA is adopting a new airworthiness directive AD for all Pilatus Aircraft Ltd. Model PC7
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. This AD
requires revising the Airworthiness Limitations section ALS of the existing aircraft maintenance manual AMM to introduce new mandatory repetitive inspections for the flap pivot arm assemblies and for certain wing angle brackets, and to implement a change to the Oxygen cylinder and pressure reducer task item. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective March 29, 2021.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD
as of March 29, 2021.
ADDRESSES: For service information identified in this final rule, contact Pilatus Aircraft Ltd., CH6371, Customer Technical Support MCC, P.O. Box 992, CH6371, Stans, Switzerland; phone: +41 041 619 67
74; fax: +41 041 619 67; email:
techsupport@pilatus-aircraft.com;
website: https www.pilatusaircraft.comen/. You may view this service information at the FAA, Airworthiness Products Section, Operational Safety Branch, 901 Locust, Kansas City, Missouri 64106. For information on the availability of this material at the FAA, call 816 329
4148. It is also available at https
www.regulations.gov by searching for and locating Docket No. FAA2020
0849.
SUMMARY:

Examining the AD Docket You may examine the AD docket at https www.regulations.gov by searching for and locating Docket No.

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FAA20200849; 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, the MCAI, 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:
Doug Rudolph, Aerospace Engineer, FAA, General Aviation & Rotorcraft Section, International Validation Branch, 901 Locust, Room 301, Kansas City, Missouri 64106; phone: 816 329
4059; fax: 816 3294090; email:
doug.rudolph@faa.gov.
SUPPLEMENTARY INFORMATION:
Background The FAA issued a notice of proposed rulemaking NPRM to amend 14 CFR
part 39 by adding an AD that would apply to all Pilatus Aircraft Ltd. Model PC7 airplanes. The NPRM published in the Federal Register on September 24, 2020 85 FR 60097. The NPRM was prompted by MCAI originated by the Federal Office for Civil Aviation FOCA, which is the aviation authority for Switzerland. FOCA has issued FOCA
AD HB2020007, dated July 23, 2020
referred to after this as the MCAI, to correct an unsafe condition with new mandatory instructions for continued airworthiness for all Pilatus Aircraft Ltd.
Model PC7 airplanes. The MCAI states:
The airworthiness limitations and certification maintenance instructions for Pilatus PC7 aeroplanes, which are approved by FOCA, are currently defined and published in the Pilatus PC7 AMM Chapter 5. These instructions have been identified as mandatory for continued airworthiness.
Failure to accomplish these instructions could result in an unsafe condition discrepancies of life-limited and overhauled components, which could result in reduced structural integrity and system reliability of the airplane.
Previously, FOCA issued AD HB2019004
later corrected to require implementation of the maintenance tasks and airworthiness limitations as specified in Pilatus PC7 AMM
Document Number 01715, or Document Number 02416, both at issue 44, as applicable. These tasks included the added wing angle bracket at rib 23 repetitive inspections.
Since that AD was issued, Pilatus amended the ALS, as defined in this AD, to introduce new mandatory repetitive inspection for the flap pivot arm assemblies and a change to the Oxygen cylinder and pressure reducer task Chapter 35Oxygen to remove the reference to the part numbers.
For the reason described above, this Swiss AD retains the requirements of FOCA

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