AD/DART/29 Amdt 2 - High Pressure Turbine Discs (Cth)

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/DART/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.

Rolls Royce Turbine Engines - Dart Series

AD/DART/29 Amdt 2

High Pressure Turbine Discs 10/2003

Applicability: Rolls Royce Dart series engines as detailed by model in Rolls Royce Service Bulletin (SB) Da72-533, Revision 2 and not incorporating modification 1946 (SB Da72-533).

Requirement: 1. Replace or rework affected high pressure turbine (HPT) discs in accordance with the procedure detailed in Rolls Royce SB Da72-533 Revision 2; OR

2. As considered appropriate by the operator, carry out a once-only inspection in accordance with Rolls Royce SB Da72-536. As provided in German LBA AD 2001-116/6 and Rolls Royce SB Da72-536 a satisfactory inspection result allows an extension to the interim compliance times of Rolls Royce SB Da72-533 of 750 flight cycles from the date of inspection but not beyond 30 June 2004. Such an extension to the interim compliance times of Rolls Royce SB Da72-533 may not be used unless a satisfactory inspection has been carried out in accordance with Rolls Royce SB Da72-536.

Note: German LBA AD 2001-116/6 refers.