AD/RB211/36 - High Pressure Turbine Cooling Air Holes (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.

Rolls Royce Turbine Engines - RB211 Series AD/RB211/36 High Pressure Turbine Cooling Air Holes 9/2006

Applicability: Rolls Royce Models RB211-524-02, 524B2-19, 524B2-39, 524B-02, 524B3-02, 524C2-19, 524B4-02, 524B4-D-02, 524D4-19, 524D4-39, 524D4-B-19, 524D4-B-39, 524D4X-19, 524D4X-B-19, 524B-B-02, 524B2-B-19, 524C2-B-19, 524G2-19, 524G3-19, 524G2-T-19, 524G3-T-19, 524H-36, 524H2-19, 524H-T-36 and 524H2-T-19 installed on, but not limited to, Boeing 747, Boeing 767 and Lockheed L-1011 aircraft Requirement: 1. Carry out an Eddy Current Inspection (ECI), as defined in Section 3., Accomplishment instructions of Rolls-Royce NMSB 72-AE969 or later EASA approved revision on the HP turbine discs identified in Sections 1.A.(3) and 1.A.(4) of Rolls-Royce NMSB 72-AE969 or later EASA approved revision.

2. Repeat the inspection as detailed in requirement 1of this AD.

Note: EASA AD 2006-0180 dated 26 June 2006 refers. Compliance: 1. In accordance with the following schedule:

By whichever is the soonest of the following conditions:

a) If the HP turbine disc cycles since new is greater than 2750 cycles on the effective date of this AD, then inspect the disc at next shop visit where the HP turbine blades have been removed from the HP turbine disc.