NTSB

Probable cause: The pilot’s inadequate preflight planning and improper in-flight decision-making, which resulted in a total loss of engine power due to fuel exhaustion.

Probable cause: The failure of the bell crank pivot bolt, which resulted in the left main landing gear collapse. Contributing to the accident was the lack of landing gear inspections in accordance with the airplane manufacturer’s maintenance manuals.

Probable cause: The pilot’s improper decision to takeoff in an area of rough water and ocean swells, which resulted in a failure of the right float struts.

Probable cause: The improperly seated fuel cap, which resulted in an in-flight fuel leak and subsequent total loss of engine power due to fuel starvation.

Probable cause: An engine loss of power due to fuel starvation from a broken fuel line between the fuel tank and the engine, which prevented the pilot from reaching a suitable landing area. Contributing to the accident was the inadequate maintenance of the engine and its components.

Probable cause: The pilot’s inadequate preflight fuel planning and improper decision to not refuel before the flight, which resulted in fuel exhaustion and the subsequent total loss of engine power.

Probable cause: The pilot’s decision to take off in high-density altitude and gusting quartering tailwind conditions, which resulted in a loss of lift and an inability to gain altitude during the initial climb.

Probable cause: The pilot’s failure to remove the engine cowl plugs during preflight, which resulted in excessive engine cylinder head temperatures during climb and a total loss of engine power.