Interesting preliminary report –
https://www.atsb.gov.au/media/news-i…iminary-report
This stands out a bit:
The preliminary report details that, on the aircraft’s previous flight into Los Angeles, the flight crew had observed a high N2* vibration advisory.
During the turnaround in Los Angeles, two maintenance engineers troubleshooted the N2 vibration issue, during which they observed particles in the right engine exhaust.
“The ATSB’s ongoing investigation is considering the communications between involved personnel during this troubleshooting, including communications between staff in Los Angeles and at the Qantas maintenance operation centre in Sydney,” Mr Mitchell said.
The troubleshooting culminated in the aircraft being released to service with its N2 vibration sensor inoperative in line with minimum equipment list (MEL) requirements, meaning N2 vibration readings were not available to the flight crew on the incident flight.
"Particles" found in the exhaust and the aircraft released to service – pretty untidy…
