NTSB

The pilot’s failure to maintain adequate clearance from a parked airplane while taxiing. Contributing to the accident was the parked airplane’s position over the double-yellow taxiway edge lines and into the taxiway object-free movement area.

The pilot’s failure to maintain control of the float-equipped airplane after the float became caught on the trailer used for takeoff.

Maintenance personnel’s improper installation of an improperly sized clamp on the fuel supply line, which allowed air to enter the supply line, a subsequent loss of engine power, and a forced landing.

The uncertificated pilot’s failure to attain/maintain a proper angle-of-attack during an initial climb that resulted in an aerodynamic stall and subsequent impact with terrain.

The pilot’s failure to remove the seat belt used as a flight control lock from the aft cockpit control stick before takeoff, which resulted in a loss of control during takeoff and collision with terrain.

The mechanic’s failure to clean the oil suction screen during the most recent maintenance, which resulted in oil starvation and subsequent total loss of engine power.

The pilot’s improper decision to conduct an off-field precautionary landing.

The pilot’s improper decision to load the airplane beyond its allowable gross weight limits, which resulted in an impact with a tree and collision with terrain.