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Old 4th Apr 2012, 12:45
  #376 (permalink)  
Thomas coupling
 
Join Date: Aug 2000
Location: UK
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SARowl the seaking is simplex , not duplex. There is no automatic back up auto pilot?? If HT or CYC fails, that's it, the channel remains inoperative.
I believe the AW139 is triplex.
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