NTSB

Probable cause: The student pilot’s inadvertent use of the control yoke to correct for a drift and his subsequent failure to maintain directional control during takeoff.

Probable cause: The pilot’s loss of control while maneuvering for reasons that could not be determined based on the available information.

Probable cause: The pilot’s incapacitation from carbon monoxide poisoning in flight due to cracks in the exhaust muffler, which resulted in the airplane’s continued flight until it ran out of fuel and its subsequent collision with terrain.

Probable cause: A total loss of engine power during takeoff due to fuel starvation as a result of a failure of internal components of the fuel servo.

Probable cause: The pilot’s exceedance of the airplane’s critical angle of attack during takeoff, which resulted in an aerodynamic stall. Contributing to the accident was the pilot’s impairment by the effects of a combination of psychoactive substances.

Probable cause: The failure of the landing gear to extend during landing approach due to the interference between the landing gear motor’s sector and worm gears.

Probable cause: The pilot’s negligent maintenance of the airplane, which resulted in improper fuel management, fuel starvation, and a loss of engine power during takeoff due to a missing securing pin in the fuel selector handle, and a su

Probable cause: The pilot’s failure to maintain an appropriate descent rate during approach, which resulted in landing short of the runway threshold.

Probable cause: The pilot’s decision to take off from unsuitable terrain with a tailwind, which resulted in a nose-over.