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Old 11th Mar 2006, 23:10
  #17 (permalink)  
stevef
 
Join Date: Feb 2006
Location: Station 42
Age: 69
Posts: 1,091
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I have an e-mail from Parker Aerospace Customer Services in answer to a recent maintenance query about this:

Turning the engine over backwards will NOT harm an Airborne vacuum pump. A problem WOULD arise if the Air Pump was installed on a pad, which rotated in opposite direction than the pump and the engine run for a period of time.

They're the experts!
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