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Recommendation issued to: Federal Aviation Administration (FAA)

Recommendation details
Output No: R20000006
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 US Federal Aviation Administration notify all operators under their jurisdiction using Rolls Royce RB211-524D4 or similar engines, of the possibility of failure of the cold stream nozzle during operation.

Initial response
Date issued: 25 January 2000
Response from: Federal Aviation Administration (FAA)
Response text:

This memo is in response to Federal Aviation Administration (FAA) Safety Recommendations 00.010 and 00.011. The recommended action is to prevent conditions that caused an uncontained cold stream nozzle failure in a Rolls-Royce plc RB211-524D4 engine model. Cold stream nozzle failure is attributed to cracking and delamination of the acoustic liner at the top right side of the cold stream nozzles resulting in departure of nozzle sections from the engine. The failure resulted in sections of the cold stream nozzle departing the engine and impacting a number of the aircraft wing leading edge panels and the number 1 flap fairing.

Recommendation 00.010: The Australian Transport Safety Bureau (formerly the Bureau of Air Safety Investigation) recommends that "the U.S. Federal Aviation Administration notify all operators under their jurisdiction using Rolls Royce RB21 1 524D4 or similar engines, of the possibility of failure of the cold stream nozzle during operation."

Engine Certification Office (ECO) Response: The FAA agrees with Recommendation 00.010, however, there are no operators at aircraft powered by RB211-524D4 engines registered in the U.S. The action required for recommendation 00.011 will provide sufficient notice to any future operators of these engines.

 
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Last update 05 April 2012