NTSB

Probable Cause: The pilot’s unsafe inflight operation of the airplane and failure to maintain clearance from a person on the ground, which resulted in a serious injury.

Probable Cause: Maintenance personnel’s failure to properly torque and inspect the magneto hardware, which resulted in a partial loss of engine power.

Probable Cause: The pilot’s decision to attempt an unfamiliar takeoff technique, his failure to maintain pitch control during takeoff, and his subsequent decision to retract flaps at a low altitude, which resulted in a descent into a building.

Probable Cause: Failure of the right main landing gear due to prolonged corrosion of the landing gear tube, which weakened the gear.

Probable Cause: The partial loss of engine power due to maintenance personnel’s failure to ensure that the ignition harnesses were properly secured and the pilot’s inappropriate pitch control inputs, which resulted in the airplane exceeding its critical angle of attack and subsequently entering an aerodynamic stall.

Probable Cause: The pilot’s improper decision to attempt an intersection takeoff in a tailwind when the full runway in the opposite, headwind direction was available.

Probable Cause: The pilot’s inadequate fuel management, which resulted in fuel starvation and a forced landing.

Probable Cause: The failure of both pilots to see and avoid each other resulting in a collision on the airstrip. Contributing was the pilots’ failure to announce their intentions over their radios as they were taking off and landing.

Probable Cause: A total loss of engine power due to fuel starvation as a result of the pilot’s modifications to the fuel system. Contributing to the accident was the pilot’s decision to continue the takeoff despite observing lower than anticipated propeller rpm, his decision to delay his precautionary landing to allow another airplane to land, and his decision to conduct flight testing of the airplane following multiple modifications.