NTSB Identification: ATL95LA030.
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Accident occurred Friday, December 23, 1994 in RHINE, GA
Probable Cause Approval Date: 07/31/1995
Aircraft: CESSNA 150G, registration: N3221J
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 REPORTED THAT THE ENGINE BEGAN TO VIBRATE ABOUT 90 MINUTES INTO THE FLIGHT, ACCOMPANIED BY AN RPM DROP. THREE MINUTES LATER, THE RPM DROPPED AGAIN, AND THE PILOT ELECTED TO PERFORM AN EMERGENCY LANDING. HE LANDED THE AIRPLANE ON A SMALL AG STRIP, BUT WAS UNABLE TO AVOID COLLIDING WITH A DITCH. EXAMINATION OF THE ENGINE REVEALED THAT THE NUMBER TWO CYLINDER ROCKER SHAFT BOSSES HAD FAILED. AD 94-05-05, WHICH REQUIRES INSPECTION OF THE BOSSES, HAD BEEN COMPLIED WITH. NO EVIDENCE OF FATIGUE WAS FOUND ON THE FRACTURE SURFACES. THE REASON FOR THE ROCKER SHAFT BOSS FAILURE WAS NOT DETERMINED.

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

THE FAILURE OF THE NUMBER TWO CYLINDER ROCKER SHAFT BOSSES, WHICH RESULTED IN A LOSS OF ENGINE POWER, AND AN EVENTUAL EMERGENCY LANDING.

Full narrative available

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