NTSB Identification: CEN12CA032
14 CFR Part 91: General Aviation
Accident occurred Saturday, October 15, 2011 in Radnor, OH
Probable Cause Approval Date: 12/13/2011
Aircraft: PIPER PA-28-235, registration: N8746W
Injuries: 1 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

The pilot reported that he was unable to start the engine using the cockpit's engine controls and he suspected that the starter drive gear was not engaging the propeller ring gear. He exited the airplane to rotate the propeller by hand in order to manually engage the starter's drive gear. As he rotated the propeller, the engine started and the unoccupied airplane proceeded across the airport, colliding with a hangar. The pilot reported that after the accident he found the airplane's ignition key was selected to one magneto instead of being in the full-off position. He also stated that he had left the mixture and throttle levers in the full-forward position and that he had not used the parking brake. The airplane's wings, vertical stabilizer, rudder, and fuselage were substantially damaged.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The pilot's failure to properly secure the engine controls prior to manually rotating the propeller, which led to an inadvertent engine start and runaway airplane.

Full narrative available

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