Airworthiness Directive · Amendment 39-15985 · Fuselage
Pilatus Aircraft Limited Model PC-7 Airplanes
This AD applies to Model PC-7 airplanes, all manufacturer serial numbers, certificated in any category.
We are adopting a new airworthiness directive (AD) for the products listed above. 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:
Unless already done, do the following actions:
(1) Visually inspect the bolts and the bores (with boroscope) of the attachment fittings for the engine mounting frame following paragraph 3.A of PILATUS Aircraft Ltd. Pilatus PC-7 Service Bulletin No. 53-006, dated November 17, 2008, at whichever of the following occurs later:
(i) Upon accumulating 5,000 hours total time-in-service (TIS) or 5 years from the date of manufacture, whichever occurs first; or
(ii) Within the next 6 months after September 9, 2009 (the effective date of this AD).
(2) If no sign of corrosion is found during the inspection required in paragraph (f)(1) of this AD, before further flight, replace the bolts. Repetitively inspect thereafter at intervals not to exceed every 5 years following PILATUS Aircraft Ltd. Pilatus PC-7 Maintenance Manual Chapter 05-10-20, page 4, dated November 30, 2008.
(3) If any sign of corrosion is found during any of the inspections required in paragraphs (f)(1) and (f)(2) of this AD, before further flight, do the corrective actions following paragraph 3.A. of PILATUS Aircraft Ltd. Pilatus PC-7 Service Bulletin No. 53-006, dated November 17, 2008. Repetitively inspect thereafter at intervals not to exceed every 5 years following PILATUS Aircraft Ltd. Pilatus PC-7 Maintenance Manual Chapter 05-10-20, page 4, dated November 30, 2008.
Note: This AD differs from the MCAI and/or service information as follows: No differences.
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.
Aircraft
