NTSB

A loss of engine power due to the failure of the mixture cable, which resulted in fuel starvation.

The pilot’s failure to follow instrument flight procedures and descent below the published minimum descent altitude, which resulted in a collision with terrain during an instrument approach.

The pilot’s failure to maintain clearance from obstacles while in cruise flight at low altitude, which resulted in a collision with a powerline.

A loss of engine power due to carburetor icing, which resulted in a forced landing.

The mechanic’s improper installation of the oil filter canister base gasket, which resulted in an oil leak and the separation of the connecting rod due to oil starvation.

The loss of engine power for undetermined reasons.

The pilot’s failure to maintain terrain clearance. Contributing factors were the mountainous terrain, the low ceiling weather conditions, and dark night conditions.

The pilot’s failure to maintain control of the airplane during an instrument approach for undetermined reasons.

The loss of engine power for undetermined reasons. Also causal was the pilot’s improper in-flight emergency planning when he misjudged his available altitude and made a 270° turn away from the airport instead of proceeding directly to it, which resulted in him landing over a mile short of the runway in heavily wooded terrain.