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Thread: APU failure and evacuation for AA731 A330-300 at LHR
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Old Jun 26, 2016 | 2:45 pm
  #7  
JDiver
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Originally Posted by alphaeagle
They only use the RAT if there are no other power sources, if all engine generators and the APU are non-functioning. They'll turn on the APU inflight as needed, including in non-emergency situations. Depends on the aircraft though, not all aircraft can use the APU inflight.
Yep. I imagine this was more like a compressor stall. Lots of smoke after a Big thump or bang.
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