NTSB

The left seated flight instructor’s improper manipulation of the landing gear position selection lever to the up position while still on the landing roll, which ultimately resulted in a landing gear collapse during a subsequent landing.

The pilot’s failure to ensure that the engine oil cap was installed before takeoff, which resulted in the oil obscuring the pilot’s view through the windshield and necessitated a forced landing on unsuitable terrain. Contributing to the accident were the pilot’s complacency and self-induced pressure to complete the flight.

The student pilot’s failure to ensure sufficient fuel onboard, which resulted in a total loss of engine power due to fuel exhaustion, which resulted in impact with terrain.

The pilot’s failure to ensure that the amphibious airplane’s wheels were retracted before attempting a water landing, resulting in a nose over during touch down. Contributing to the accident was the lack of a checklist available to the pilot.

The student pilot’s decision to continue from visual flight into instrument meteorological conditions, which resulted in a collision with trees and mountainous terrain.

The pilot’s incorrect flight control input during the landing flare, which resulted in an impact with the ground.

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.