The crew mistakenly shut down Being_in_operation the functioning engine , and pumped Motion more fuel into the malfunctioning one , which burst Motion into flames .

The investigating Board believed Know the most likely cause of the accident to be a malfunctioning over-speeding outboard propeller caused by metal particles obstructing oil feed line regulator valves .

The FQIS on Flight 800 is known Know to have been malfunctioning ; the captain remarked Statement on what he called Name_conferral `` crazy '' readings from the system approximately two minutes and thirty seconds before the aircraft exploded .