AD/PC-12/50 - Powerplant - Torque Oil Pressure Pipe (Cth)

AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Pilatus PC-12 Series Aeroplanes AD/PC-12/50 Powerplant - Torque Oil Pressure Pipe 11/2007

Applicability: Pilatus PC-12, PC-12/45 and PC-12/47 aircraft, all serial numbers, with oil pipe/hose assemblies Part Number (P/N) 577.11.12.104, 577.11.12.105, 946.37.74.305, 946.37.74.306, 946.37.74.307, 946.37.74.308 or 946.37.74.311 installed. Requirement: 1. Perform a configuration check and inspection of the pipe/hose assemblies for abrasive damage (chafing) and distortion in accordance with paragraph 3.B of PILATUS PC-12 Service Bulletin No. 71-007.

2. If during the configuration check and inspection detailed in Requirement 1 of this AD any oil pipe/hose assemblies with abrasive damage (chafing) are found, replace the affected hose/pipe assemblies in accordance with paragraph 3.B, 3.D and 3.E of PILATUS PC-12 Service Bulletin No. 71-007.

3. If during the configuration check and inspection detailed in Requirement 1 of this AD, no damage on oil pipe/hose assemblies is found, replace the hose/pipe assemblies as listed in the applicability of this AD, in accordance with paragraph 3.B, 3.C and 3.E of PILATUS PC-12 Service Bulletin No. 71-007.