NTSB

Probable cause: The noninstrument-rated pilot’s intentional visual flight rules flight into instrument meteorological conditions, which resulted in a loss of control due to spatial disorientation. Contributing to the accident was the pilot’s self-induced pressure to complete the flight as planned.

Probable cause: A total loss of engine power due to carburetor icing during final approach, which resulted in a hard landing short of the runway and the nose landing gear collapsing.

Probable cause: The loss of right engine power due to fuel starvation, which resulted from corrosion debris in the fuel lines. Contributing to the accident was the mechanic’s and pilot’s inadequate maintenance of the airplane before the flight.

Probable cause: The pilot’s improper decision to take off with a known brake malfunction, which resulted in a collision with a barn during landing on a wet runway.  

Probable cause: An in-flight separation of the right wing due to upward and rearward bending that led to an overstress fracture. The reason for the upward and rearward bending could not be determined based on the available information.

Probable cause: The pilot’s improper verification of the fuel quantity during the preflight inspection, which resulted in fuel exhaustion and a subsequent loss of engine power. Contributing to the accident was the pilot’s distraction due to a malfunctioning hangar door and a telephone call while preparing for the flight.   

Probable cause: Maintenance personnel’s failure to remove a paper towel from the engine during recent maintenance, which resulted in oil starvation, the failure of a connecting rod, and a catastrophic engine failure and subsequent total loss of engine power.

Probable cause: The failure of both pilots in both airplanes to see and avoid the other airplane as they converged nearly head-on at the same altitude.

Probable cause: The pilot’s failure to see and avoid a post during a go-around following a landing on unsuitable terrain.