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31st May 2011 | 02:34

#828 (permalink)

galaxy flyer

Joined: Dec 2002

: ATP+Mil

Posts: 3,982

Likes: 566

From: Where the Quaboag River flows, USA

All indications of AIRSPEED are based on air passing into the pitot tubes, processed by ADIRUs for output to the PFD or ISIS. Inertial is not used, and not usable, for airspeed.

One is not "dispatched" in alternate or abnormal law.