Airworthiness Directive · Amendment 39-17468 · Time limits
Pilatus Aircraft Ltd. Airplanes
Superseded. A later AD replaced this one: AD 2014-25-04. Comply with the one in force.
This AD applies to 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, all manufacturer serial numbers (MSN), and MSN 2001 through 2092, that are certificated in any category.
Note 1 of paragraph (c): For MSN 2001-2092, these airplanes are also identified as Fairchild Republic Company PC-6 airplanes, Fairchild Industries PC-6 airplanes, Fairchild Heli Porter PC-6 airplanes, or Fairchild-Hiller Corporation PC-6 airplanes.
We are superseding an existing airworthiness directive (AD) for 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 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 failure to inspect and maintain stabilizer-trim attachment components and the flap actuator could result in loss of control. We are issuing this proposed AD to require actions to address the unsafe condition on these products.
Unless already done, do the following actions:
(1) For all affected Models PC-6/B2-H2 and PC-6/B2-H4: Before further flight after July 29, 2013 (the effective date of this AD), incorporate the maintenance requirements as specified in Chapter 04, Airworthiness Limitations, dated July 31, 2012, of the Pilatus PC-6 Maintenance Manual; into your FAA-accepted maintenance program (maintenance manual).
Note 2 of paragraph (f)(1) of this AD: European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Community, has issued EASA AD No.: 2012-0268, dated December 19, 2012, that discusses revision 16 of the Pilatus PC-6 Maintenance Manual. Revision 16 and revision 17 of the Pilatus PC-6 Maintenance Manual both contain the Chapter 04, Airworthiness Limitations, dated July 31, 2012.
(2) For all affected Models PC-6 other than the Models PC-6/B2-H2 and PC-6/B2-H4: Before further flight after July 29, 2013 (the effective date of this AD), incorporate the maintenance requirements as specified in Pilatus PC-6 Airworthiness Limitations, Document No. 02334, Revision No. 3, dated July 31, 2012, into your FAA-accepted maintenance program.
(3) For all Models PC-6 airplanes: If the actuator has accumulated 3,500 hours TIS or more since new or last overhauled or 7 years or more since new or last overhauled, whichever occurs first, replacement of the flap actuator (except part numbers 978.73.14.101 and 978.73.14.103) is required within 350 hours TIS after July 29, 2013 (the effective date of this AD) or 6 months after July 29, 2013 (the effective date of this AD), whichever occurs first. Actuators with less than 3,500 hours TIS or 7 years since new or last overhauled are covered by the ALS requirement.
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.
