NTSB

Maintenance personnel’s failure to use the correct throttle linkage hardware when reinstalling the engine, resulting in a disconnection of the throttle during flight.

The pilot’s exceedance of the wing’s critical angle of attack, which resulted in an aerodynamic stall and loss of aircraft control.

A loss of directional control and subsequent runway excursion resulting as a result of the inadvertent rudder input by the passenger.

A total loss of engine power as a result of fuel starvation. Contributing to the accident was the pilot’s failure to properly manage the fuel on board the airplane and his failure to perform an adequate preflight inspection.

The pilot’s decision to depart shortly after a landing helicopter, which resulted in an encounter with the helicopter’s wake turbulence and a loss of airplane control. Contributing to the accident was the pilot’s impairment by his recent use of ethanol.

The pilot and flight instructor’s failure to ensure that the landing gear were extended prior to landing.

The fueler’s addition of the incorrect fuel to the fuel tanks which resulted in a total loss of engine power.

The pilot’s inadequate preflight planning and fuel system inspection, which resulted in fuel exhaustion.

The in-flight malfunction of the throttle control pivot arm, which resulted in a total loss of engine power and the subsequent collision with terrain during the forced landing.