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Summary

Summary

On 22 October 2004, at approximately 1910 Universal Co-ordinated Time, a Boeing Company 747-338 aircraft, registered VH-EBU, was being operated on a scheduled passenger service from Honolulu, in the United States of America, to Sydney, Australia. The flight crew had been cleared by air traffic control to climb from flight level (FL) 340 to FL360. When the crew set climb thrust on the engines, they reported that they felt a vibration in the aircraft and the number-3 engine airborne vibration monitor lights illuminated, indicating that the number-3 engine had an abnormal vibration level. The crew shut down the number-3 engine and continued to Sydney.

A subsequent engineering examination of the number-3 engine indicated that a low pressure turbine (LPT) second stage blade had failed. The ATSB examination revealed that the LPT blade had failed as a result of high cycle fatigue originating at a site of an anomalous inclusion in the blade material.

 
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