NTSB Identification: CEN12LA455
14 CFR Part 91: General Aviation
Accident occurred Tuesday, July 17, 2012 in Shelby, IL
Probable Cause Approval Date: 01/30/2014
Aircraft: CESSNA 175A, registration: N7003E
Injuries: 2 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.

While in cruise flight, the pilot-rated passenger and flight instructor heard a knocking sound from the engine. The flight instructor reduced the engine power and diverted the airplane toward the nearest airport. Subsequently, the pilots heard a loud "clunk" sound from the engine, the engine lost power, and smoke filled the cockpit. The flight instructor executed a forced landing to a field, and the airplane nosed over. An examination of the engine found that the No. 3 cylinder had failed due to oil starvation; however, a reason for the oil starvation could not be determined.

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

The loss of engine power due to oil starvation for reasons that could not be determined because engine examinations revealed no malfunctions or failures that would have led to oil starvation.

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