Accident Overview
Two airplanes, a Cessna 172 and a Cessna 170B, collided in midair during cruise flight in day visual flight rules meteorological conditions. The Cessna 172, operated by a solo commercial pilot, was traveling in a west-southwest direction. The Cessna 170B, carrying an airline transport certificated pilot and three passengers, was flying northbound at an estimated altitude between 1,500 and 2,000 feet.
Witness Account
A pilot-rated ground witness reported observing the collision. According to the witness, as the Cessna 172 approached the right side of the Cessna 170B and their flight paths converged, the engine power of the 172 increased. The airplane then pitched up sharply. The witness stated that the two airplanes collided, with the 170B striking the left side of the 172. After the impact, both airplanes became momentarily entwined and fell vertically to the ground.
Wreckage Examination
Examination of the wreckage disclosed impact signatures consistent with the witness's statement. The Cessna 170B displayed black tire rubber deposits on portions of the white paint covering the left lift strut. Traces of black tire material were also found on portions of the 170B's propeller assembly. The Cessna 172's left main tire and inner tube were slashed longitudinally, consistent with a propeller strike, through to the aluminum wheel hub assembly.
Additional Information
No radar coverage existed for the airspace near the accident site. Neither pilot was in communication with any air traffic control facility. Toxicological samples were submitted from both pilots, and both tested negative for alcohol or drugs.