Insider Was Needed to Disable Plane Systems
16 Mar 2014 12:59:57
asia.wsj.com
f multiple communication systems aboard Malaysia Airlines 3786.KU +2.13% Flight 370 were manually disabled, as investigators increasingly suspect happened, it would have required detailed knowledge of the long-range Boeing Co. BA +1.00% 777's inner workings.
The first loss of the jet's transponder, which communicates the jet's position, speed and call sign to air traffic control radar, would require disabling a circuit breaker above and behind an overhead panel. Pilots rarely, if ever, need to access the circuit breakers, which are reserved for maintenance personnel.
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