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Recommendation issued to: Rolls Royce, Ltd.

Recommendation details
Output No: R20010230
Date issued: 05 February 2002
Safety action status:
Background: Why this Recommendation was developed

Output text

The Australian Transport Safety Bureau recommends that Rolls Royce Ltd expedite the development, trial and implementation of a suitable engineering solution to prevent the mis-installation of combustion fairings on RB211-524 and RB211-22B engines.

Initial response
Date issued: 24 April 2002
Response from: Rolls Royce, Ltd.
Action status: Closed - Accepted
Response text:

A detailed presentation was made to operators at a RR/Boeing Working Together Team (WTT) meeting in Derby last week, Qantas in attendance, and there will be a baulking feature introduced to prevent these fairings being incorrectly fitted. A service trial is going to take place with British Airways initially on the 524-T, later with the other marks, as the fairings are slightly different.

We cannot give you any timescales at present as we do not know when BA can accommodate the service trial but if all goes well we would expect a Service Bulletin to rework existing Combustion Fairings.

ATSB response:

On 24 October 2003, Rolls-Royce Ltd issued service bulletin (SB) RB.211-72-D497, introducing an engineered mechanism to reduce the possibility of incorrect fitment of the left and right combustion gas generator fairing assemblies on RB211-524G and H-T engines fitted to Boeing 747 and 767 aircraft.  Introduction of the service bulletin followed a satisfactory engineering evaluation and trial fitment.  The modifications introduced by the service bulletin were approved by the United Kingdom Civil Aviation Authority on 21 July 2003 and have been reviewed by Boeing and the United States Federal Aviation Administration.  Compliance with the service bulletin was listed as optional, with incorporation being subject to customer choice.

The ATSB considers that the issue of service bulletin (SB) RB.211-72-D497 by Rolls-Royce Ltd fully addresses the intent of safety recommendation R20010230.  The implementation of the service bulletin by aircraft operators should significantly mitigate the risk of inadvertent combustion fairing panel release resulting from miss-installation.

 
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Last update 01 April 2011