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Thread: 737 driftdown altitude - "Lt / Rt eng out"
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Old 1st January 2010 | 15:19
  #4 (permalink)  
FCS Explorer
 
Joined: Nov 2005
Posts: 342
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maybe because....
if you loose #2 than #1 bleed will have to supply BOTH sides wing AI.
but
if you loose #1 you can use APU bleed for that side and keep the isolation valve closed.
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