NTSB

Probable cause: Innacurate airspeed indications due to contamination of the pitot-static system with insect remains, which resulted in a high approach and landing speed and subsequent runway overrun.

Probable cause: The pilot’s failure to see and avoid trees during low-altitude flight.

Probable cause: The pilot’s loss of runway visibility during landing in rain, which resulted in the pilot’s loss of situational awareness and subsequent loss of airplane control.

Probable cause: The pilot’s failure to maintain an adequate glidepath during approach, which resulted in an impact with a semi-truck.

Probable cause: The pilot’s failure to maintain clearance from terrain while maneuvering at a low altitude. Contributing to the accident was the pilot’s mistaken entry into a canyon surrounded by steep rising terrain while at a low altitude for reason

Probable cause: The flight instructor’s inadequate in-flight fuel management, which resulted in fuel starvation and a total loss of engine power. 

Probable cause: The loss of yaw control due to an inadequately compressed rudder swage, which resulted from inadequate maintenance and led to the separation of the forward right rudder cable.

Probable cause: A total loss of engine power for reasons that could not be determined based on the available evidence. 

Probable cause: The pilot’s failure to identify the alternate runway, to perform a timely precautionary landing, and to maintain airplane control. Contributing to the accident was the failure of the left engine due to oil starvation for reasons that could not be determined based on the postaccident examination.