NTSB Identification: ATL89LA056.
The docket is stored on NTSB microfiche number 37953.
Accident occurred Tuesday, December 20, 1988 in ATHENS, GA
Probable Cause Approval Date: 11/28/1989
Aircraft: BEECH A36, registration: N17696
Injuries: 2 Minor.

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 CRUISING AT 6,000', THE PLT FELT AN INTENSE VIBRATION FM THE ENG. POWER WAS REDUCED & A DESCENT WAS BEGUN TOWARD A NEARBY ARPT. BEFORE REACHING THE ARPT, THE ENG LOST POWER & AN EMERGENCY WHEELS-UP LANDING WAS MADE IN AN OPEN FIELD. AN EXAM OF THE ENG REVEALED THE #1 EXHAUST VALVE HAD FAILED. THE VALVE GUIDE WAS BATTERED & BROKEN, AND WAS LOOSE IN ITS BORE. THE BORE WAS FRETTED & HAD BECOME OVERSIZED. THE ENG HAD BEEN OVERHAULED & INSTALLED IN THE ACFT ON 1/20/82 WITH A TOTAL TIME OF 1515 HRS. ACCORDING TO THE LOG BOOK, NEW VALVES & VALVE GUIDES HAD BEEN INSTALLED AT THAT TIME. THE ENG TIME SINCE MAJOR OVERHAUL WAS 1041 HRS.

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

ENGINE ASSEMBLY,VALVE,EXHAUST..FAILURE,TOTAL

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