NTSB

Maintenance personnel’s failure to follow the avionics installation guidance for the oil pressure sensor, which resulted in the high-cycle fatigue failure of a line, oil starvation, and the subsequent loss of engine power. Contributing to the accident was the pilot’s failure to perform an adequate preflight inspection of the airplane.

A blockage of the fuel filter inlet by a piece of debris, which resulted in fuel starvation and a total loss of engine power.

The failure of the owner to comply with a service bulletin, which resulted in the failure of the left main landing gear torque tube due to fatigue cracking.

A loss of directional control during the landing roll due to a fractured brake line fitting on the brake caliper.

The pilot’s failure to complete proper preflight performance planning and his operation of the airplane outside of the manufacturer’s specified weight and balance limitations, which resulted in the airplane’s inability to maintain altitude and an impact with trees and terrain during an attempted forced landing.

The pilots’ failure to climb and complete a normal traffic pattern after making a low approach and their failure to extend the flaps for reasons that could not be determined, and the flight instructor’s failure to ensure adequate airspeed and bank control during the turn to final approach, which resulted in an accelerated stall.

The pilot’s inadequate preflight inspection, during which he failed to detect water contamination in the fuel system, which resulted in a loss of engine power on approach.

The pilot’s in-flight loss of control while practicing aerodynamic stall recoveries.