NTSB Identification: FTW97LA116.
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Accident occurred Monday, March 10, 1997 in CLEVELAND, OK
Probable Cause Approval Date: 08/25/1997
Aircraft: Cessna 172P, registration: N65753
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The pilot, who is also an A&P mechanic, installed and torqued a new helicoil and spark plug. A satisfactory engine run was completed. During takeoff climb, at 300 feet AGL, 'the engine popped and lost power.' The pilot executed a 180-degree turn, and 'landed fast downwind.' During the landing roll, the aircraft overran the end of the runway and 'encountered a rut and flipped over' damaging both wings. An examination of the airplane revealed that the newly installed spark plug was hanging by its ignition wire.

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

The pilot/mechanic's improper installation of the spark plug, resulting in its separation from the engine. A factor was the unsuitable terrain available in the runway's overrun area.

Full narrative available

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