Airworthiness Directive · Amendment 39-21186 · Stabilizers
Pilatus Aircraft Ltd. Airplanes
This AD applies to Pilatus Aircraft Ltd. (Pilatus) Models PC-6, PC-6/350, PC-6/350-H1, PC-6/350-H2, PC-6/A, PC-6/A-H1, PC-6/A-H2, PC-6/B-H2, PC-6/B1-H2, PC-6/B2-H2, PC-6/B2-H4, PC-6/C-H2, PC-6/C1-H2, PC-6-H1, and PC-6-H2 airplanes, all serial numbers, certificated in any category.
Note 1 to paragraph (c) of this AD: These airplanes may also be identified as Fairchild Republic Company airplanes, Fairchild Heli Porter airplanes, or Fairchild-Hiller Corporation airplanes.
The FAA is adopting a new airworthiness directive (AD) for Pilatus Aircraft Ltd. Models PC-6, PC-6/350, PC-6/350-H1, PC-6/350-H2, PC-6/A, PC-6/A-H1, PC-6/A-H2, PC-6/B-H2, PC-6/B1-H2, PC-6/B2-H2, PC-6/ B2-H4, PC-6/C-H2, PC-6/C1-H2, PC-6-H1, and PC-6-H2 airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as rudder shaft assemblies with incorrect rivet configurations. The FAA is issuing this AD to address the unsafe condition on these products.
Unless already done, do the following actions in paragraphs (f)(1) and (2) of this AD:
(1) Within the next 100 hours time-in-service after September 9, 2020 (the effective date of this AD) or within the next 12 months after September 9, 2020 (the effective date of this AD), whichever occurs first, inspect the rudder shaft assembly for proper rivet configuration and repair any discrepancies before further flight in accordance with the Accomplishment Instructions—Part 1, paragraph 3.B. and table 1, of Pilatus PC-6 Service Bulletin No: 27-006, Rev. No. 1, dated September 4, 2018.
(2) After September 9, 2020 (the effective date of this AD), do not install a rudder shaft assembly on any airplane unless it has been inspected in accordance with paragraph (f)(1) of this AD and found to be free of discrepancies or all discrepancies have been repaired or replaced.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
