Airworthiness Directive · Amendment 39-11946 · Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 Airplanes
Pilatus Aircraft Ltd. Models PC-12 and PC-12/45 Airplanes
Superseded. A later AD replaced this one: AD 2007-21-11. Comply with the one in force.
This AD affects Models PC-12 and PC-12/45 airplanes, manufacturer serial numbers (MSN) 101 through MSN 301, that:
(1) Are certificated in any category; and
(2) Are equipped with any of the following Pilatus torque oil-pressure tubes and py pressure pipe assemblies:
(i) Pilatus part number (P/N) 577.11.12.105 (or FAA-approved equivalent part number);
(ii) Pratt & Whitney Canada (P&WC) P/N 3119969 (or FAA-approved equivalent part number); and
(iii) Pilatus P/N 577.11.12.104 (or FAA-approved equivalent part number).
This amendment adopts a new airworthiness directive (AD) that applies to certain Pilatus Aircraft Ltd. (Pilatus) Models PC-12 and PC- 12/45 airplanes. This AD requires you to perform a one-time inspection for abrasion damage, distortion, and proper clearance of the torque oil-pressure tubes and py pressure pipe, and if necessary, adjust and replace these components. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Switzerland. The actions specified by this AD are intended to correct abrasive damage from rubbing pipes and consequent loss of engine oil.
To address this problem, you must accomplish the following actions:
| Actions | Compliance times | Procedures |
|---|---|---|
| (1) Inspect the torque oil-pressure tubes and the py pressure pipe assemblies for abrasion damage and distortion | Within the next 50 hours time-in-service (TIS) after December 15, 2000 (the effective date of the AD) | Accomplish in accordance with the ACCOMPLISHMENT INSTRUCTIONS—AIRCRAFT paragraph of Pilatus Service Bulletin No. 71-004, dated December 22, 1999. |
| (2) If there is any abrasion damage or distortion, accomplish the following | Before further flight after the inspection | As specified in the above-referenced service information. |
| (i) Replace the pipes and tubes with the damage or distortion; and | ||
| (ii) Make sure there is a clearance distance of not less than 0.12 inches (3.0 millimeters), and make any appropriate adjustments. | ||
| (3) If no abrasion damage or distortion is found, make sure there is a clearance distance of not less than 0.12 inches (3.0 millimeters), and make any appropriate adjustments | Before further flight after the inspection | As specified in the above-referenced service information. |
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.
