Commonwealth legislation

AD/RRT-S/15 - Stage 2 Low Pressure Turbine Blades

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires operators of Rolls Royce Spey 555-15, -15H, -15N and -15P engines to replace their Stage 2 low‑pressure turbine blades with the improved design specified in Rolls Royce Service Bulletin Sp72‑1064 Revision 1 (Mod 6428) by 31 December 2005 (Applicability; Requirement; Compliance). The Civil Aviation Safety Authority delegate issued the mandatory direction; affected operators pay for and arrange the replacements to reduce in‑service blade failures (Background; Requirement).

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AIRWORTHINESS DIRECTIVE

View image in the official source

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 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.

AD/RRT-S/15 Stage 2 Low Pressure Turbine

AD/RRT-S/15 Stage 2 Low Pressure Turbine Blades 9/2001

View image in the official sourceAD/RRT-S/15 Stage 2 Low Pressure Turbine Blades 9/2001

Applicability: Rolls Royce Spey 555-15, -15H, -15N, and -15P engines.

Requirement: Replace Stage 2 Low Pressure Turbine Blades in accordance with Rolls Royce Spey SB Sp72-1064 Revision 1 (Mod 6428).

Note 1: CAA (UK) AD 005-07-2000 refers.

Note 2: Compliance with original issue of SB Sp 72-1064 satisfies the intent of this AD.

Note 3: This Requirement was previously addressed in AD/RRT-S/12 Amdt 2.

Compliance: No later than 31 December 2005.

This Airworthiness Directive becomes effective on 6 September 2001.

Background: Stage 2 LPT blade failures continue to occur in service. This Directive mandates an improved blade that exhibits reduced stresses. This Directive supersedes AD/RRT- S/12 Amdt 2 which has been cancelled.

Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 26 July 2001