PPRuNe Forums - View Single Post - 747-400 Wing Anti-Ice

12th Jan 2003, 16:15

#12 (permalink)

HiDrvr

Join Date: May 2002

Location: France

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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.