Event Sequence
The pilot of an aircraft reported that when attempting to start the engine, the starter would not turn the engine over. Suspecting that the oil had congealed, the pilot exited the aircraft and manually pulled the propeller. At that moment, the engine started and the aircraft began to move forward. The pilot jumped onto the right wing in an effort to enter the cockpit and shut down the engine. However, before reaching the cockpit, the aircraft collided with a Piper PA-23, registration N200SA. The impact knocked the pilot off the wing, resulting in injury.
Examination Findings
Post-accident examination of the pilot's aircraft revealed that the starter gear was extended, the retainer bushing was missing, and corrosion was present on the rotator shaft. Additionally, the magneto switch was found in the "Both" position, the fuel boost pump was set to "High", and the throttle was open approximately three-quarters.