AD/JT8D/29 Amdt 2 - High Pressure Compressor Disc Inspection (Cth)

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/JT8D/29 Amdt 1 and issues the following AD under subregulation 39.1 (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.

Pratt and Whitney Turbine Engines - JT8D Series

AD/JT8D/29 Amdt 2

High Pressure Compressor Disc Inspection 9/2003 TX

Applicability: Pratt & Whitney JT8D-1,1A,-1B,-7,-7A,-7B,-9,-9A,-11,-15,-15A,-17,-17A,-17R, and 17AR series engines.

Requirement: 1. Carry out initial and repetitive inspections of the high pressure compressor (HPC) discs for corrosion pits and cracks, after stripping the protective coating, in accordance with the accomplishment instructions of Pratt and Whitney (PW) Alert Service Bulletin (ASB) JT8D A6431, Revision 1, dated 7 March, 2003; and

2. Replace HPC discs found with corrosion pits or cracks beyond serviceable limits as defined by PW ASB JT8D A6431, Revision 1, dated 7 March, 2003.

Note 1: FAA AD 2003-12-07 Amdt 39-13192 refers and supersedes FAA AD 98-12- 07 and 94-20-01.

Compliance: For Requirement 1: At intervals specified in the compliance section of PW ASB JT8D A6431, Revision 1, dated 7 March, 2003 from the effective date of this Directive.

For Requirement 2: Prior to further flight.