Aircraft and Preflight
The pilot of a 1949 Stinson 108-3 serviced the aircraft with 24 gallons of automotive fuel on the morning of the accident. He checked the fuel for water or debris and performed a simple alcohol test, noting no problems. The engine started perfectly, and the runup check revealed no anomalies.
Takeoff and Power Loss
At the beginning of the takeoff roll, engine power was good. Once airborne, the engine began running unusually. The pilot observed the tachometer and saw that the rpm had decreased by 300. He confirmed that both the throttle and mixture controls were in the forward position.
Maneuvering and Descent
As engine power continued to decrease, the pilot realized he could not turn back to the runway and would not clear the tops of the trees ahead. He flew toward a gap in the trees, attempting to keep the airplane flying as long as possible. The aircraft ultimately entered a controlled stall and descended into a power line.
Impact and Fire
The airplane then impacted the ground, erupted in flames, and was consumed by a post-impact fire.
Post-Accident Examination
Examination of the remaining portions of the engine revealed no evidence of any preimpact mechanical deficiencies. A sample of fuel from the container used to service the airplane was examined and found absent of debris or water.