Moving a fuel control switch from RUN to CUTOFF in flight would cause the fuel supply to stop flowing to the associated engine, resulting in its immediate shutdown and the loss of any thrust. That would also stop the two electrical generators on each engine from providing power to many of the aircraft’s systems and some of its cockpit displays.
The fuel control module underneath the jet’s throttle handles holds the two switches, which are guarded with brackets on either side to prevent accidental movement. A metal stop lock mechanism on each switch is designed to require the flight crew to lift each switch past the stop in order to move it.
According to the people familiar, the available information on the black boxes at this point cannot rule in or out improper, inadvertent or intentional actions that preceded or followed the apparent loss of thrust before the aircraft crashed into a hostel for students at BJ Medical College.
可能是机长的自杀行为。
https://theaircurrent.com/aviation-safe ... -switches/
NC CHINESE AMERICANS FOR TRUMP 
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