Airworthiness Directive · Amendment 39-14664 · Pilatus Aircraft Ltd. Models PC-6, PC-6-H1, PC-6-H2, 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, and PC-6/C1-H2 Airplanes
Pilatus Aircraft Ltd. Models PC-6, PC-6-H1, PC-6-H2, 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, and PC-6/C1-H2 Airplanes
This AD affects the following Models PC-6, PC-6-H1, PC-6-H2, 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, and PC-6/C1-H2 airplanes and serial numbers that are certificated in any category:
(1) Group 1 (maintains the actions from AD 2002-21-08): All manufacturer serial numbers (MSN) up to and including 939.
(2) Group 2: MSN 2001 through 2092.
Note: These airplanes are also identified as Fairchild Republic Company PC-6 airplanes, Fairchild Heli Porter PC-6 airplanes, or Fairchild-Hiller Corporation PC-6 airplanes.
We are adopting a new airworthiness directive (AD) that supersedes AD 2002-21-08, which applies to certain Pilatus Aircraft Ltd (Pilatus) Model PC-6 airplanes. AD 2002-21-08 currently requires you to inspect the aileron assembly for correct configuration and modify as necessary. Since we issued AD 2002-21-08, the FAA determined the action should also apply to all the models of the PC-6 airplanes listed in the type certificate data sheet of Type Certificate (TC) No. 7A15 that were produced in the United States through a licensing agreement between Pilatus and Fairchild Republic Company (also identified as Fairchild Industries, Fairchild Heli Porter, or Fairchild-Hiller Corporation). In addition, the intent of the applicability of AD 2002-21-08 was to apply to all the affected serial numbers of the airplane models listed in TC No. 7A15. This AD retains all the actions of AD 2002-21-08, adds those Fairchild Republic Company airplanes to the applicability of this AD, and lists the individual specific airplane models. We are issuing this AD to correct improper aileron assembly configuration, which could result in failure of the aileron mass balance weight. Such failure could lead to loss of control of the airplane.
To address this problem, you must do the following:
| Actions | Compliance | Procedures |
|---|---|---|
| (1) Inspect the aileron assembly for proper configuration | (i) For Group 1 Airplanes: Within the next 30 days after December 6, 2002 (the effective date of AD 2002-21-08), unless already done (ii) For Group 2 Airplanes: Within the next 30 days after August 7, 2006 (the effective date of this AD), unless already done. | Follow Pilatus Service Bulletin No. 62B, dated May 1967, as specified in Pilatus PC-6 Service Bulletin No. 57-001, dated December 20, 2001. |
| (2) If the aileron assembly configuration incorporates aileron part number (P/N) 6106.10.xxx or P/N 6106.0010.xxx, modify the assembly following Pilatus Service Bulletin No. 62B, dated May 1967, and install a placard | For All Airplanes: Before further flight after the inspection required in paragraph (e)(1) of this AD, unless already done | Follow Pilatus Service Bulletin No. 62B, dated May 1967, as specified in Pilatus PC-6 Service Bulletin No. 57-001, dated December 20, 2001. |
| (3) If the aileron assembly configuration differs from that specified in Pilatus Service Bulletin No. 62B, dated May 1967, or if the part numbers are missing and cannot be verified: | For All Airplanes: Before further flight after the inspection required in paragraph (e)(1) of this AD, unless already done | Follow Pilatus PC-6 Service Bulletin No. 57-001, dated December 20, 2001. |
| (i) Obtain a repair scheme from the manufacturer through the FAA at the address specified in paragraph (f) of this AD; and | ||
| (ii) Incorporate this repair scheme. | ||
| (4) Do not install any aileron assembly unless the inspection, modification, placard, and repair requirements (as applicable) of paragraphs (e)(1), (e)(2), (e)(3), (e)(3)(i), and (e)(3)(ii) of this AD are done | (i) For Group 1 Airplanes: As of December 6, 2002 (the effective date of AD 2002-21-08) (ii) For Group 2 Airplanes: As of August 7, 2006 (the effective date of this AD). | Follow Pilatus PC-6 Service Bulletin No. 57-001, dated December 20, 2001. |
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.
