NTSB

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.

The pilots’ failure to maintain adequate airspeed while maneuvering, which resulted in an exceedance of the airplane’s critical angle of attack and an aerodynamic stall.

A loss of engine power due to fuel starvation due to a blockage of the fuel tank outlet port.

The pilot’s failure to maintain altitude while maneuvering the airplane at a low altitude, which resulted in impact with trees and terrain.