What happened
On the morning of the accident, the pilot prepared a 1949 Stinson 108-3 for flight using 24 gallons of automotive fuel. After performing a visual check for water or debris and conducting an alcohol test, the pilot found no issues. The engine started without difficulty, and the runup check showed no anomalies.
During the initial stages of the takeoff roll, engine power remained sufficient. However, once the aircraft became airborne, the engine began operating unusually. The pilot observed a decrease of 300 RPM on the tachometer. Despite verifying that both the throttle and mixture controls were in the forward position, the engine power continued to decline.
Realizing the aircraft could not return to the runway and would not clear the upcoming treeline, the pilot steered toward a gap in the trees. The aircraft entered a controlled stall and struck a power line before impacting the ground. The impact resulted in a post-impact fire that consumed the aircraft. There were no injuries reported.
The investigation
Investigators examined the remaining components of the engine and found no evidence of mechanical deficiencies prior to the impact. Additionally, a sample of fuel taken from the container used to service the aircraft was tested and found to be free of water or debris.