Recommendation R20000010

Recommendation issued to: Civil Aviation Safety Authority

Recommendation details
Output No: R20000010
Date issued: 07 January 2000
Safety action status:
Background: Why this Recommendation was developed

Output text

The Australian Transport Safety Bureau (formerly the Bureau of Air Safety Investigation) recommends that the Civil Aviation Safety Authority review Rolls Royce RB211-524D4 engine cold stream nozzle inspection criteria to minimise the possibility of failure during operation

Initial response
Date issued: 05 May 2000
Response from: Civil Aviation Safety Authority
Action status: Closed - Accepted
Response text:

CASA agrees with ATSB recommendation R20000010. CASA Technical Specialists have consulted with Rolls Royce Australia and Qantas Powerplants Engineering on this subject. Advice received included:

Rolls Royce has issued Non Modification Service Bulletin 78-C955. NMSB 78-C955 details an on-wing cold stream nozzle inspection procedure. CASA is confident that compliance with NMSB 78-C955 will alleviate concern for the airworthiness of the RB211-524D-4 cold stream nozzle.

Qantas has carried out an inspection of all RB211-524D-4 engines in accordance with the procedures detailed in NMSB 78-C955. That inspection program has identified a number of defects. Defect rectification action has now been completed.

To ensure the continued airworthiness of RB211-524D-4 engines in service in Australia, CASA is preparing Airworthiness Directive AD/RB211/22 "Cold Stream Nozzle Inspection". AD/RB211/22 will mandate compliance with NMSB 78-C955. UK CAA AD 005-01-2000 refers.

CASA is satisfied the action taken by the Authority, Rolls Royce and Qantas adequately addresses the safety concern identified in the ATSB report on Occurrence 199906038 dated 7 January 2000.

Last update 05 April 2012