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Thread: 747-400 Wing Anti-Ice
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Old 12th January 2003 | 16:15
  #12 (permalink)  
HiDrvr
 
Joined: May 2002
Posts: 9
Likes: 0
From: France
Simple answer to why the system allows manual override to on with flaps deployed. Maintenance procedures sometime require the valves to be opened, with flaps deployed and on the ground, but with no bleed air to overheat the LE's.
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