NTSB Identification: DFW05LA083.
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Accident occurred Tuesday, March 08, 2005 in Austin, TX
Probable Cause Approval Date: 07/07/2005
Aircraft: Beech 77, registration: N3870W
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.
The 5,797-hour pilot reported during cruise flight, he heard "a loud fluttering metallic sound" originating from the engine followed by the propeller stopping abruptly. The pilot initiated a forced landing into a nearby golf course. After touchdown, the pilot noted that due to the downhill slope, and wet grass, braking action was minimal. As the airplane crossed rising terrain near the green, the pilot applied full aft controls and the airplane became airborne. Subsequently, the airplane impacted trees and came to rest upright. Examination of the engine revealed that the number three cylinder connecting rod was separated from the crankshaft. The number three journal was gouged, scoured, and displayed evidence of heat distress. Small amounts of paper fiber, consistent with a shop towel were found throughout the engine crankcase, oil filter, and oil screen. An entry in the engine logbook indicated that the day prior to the accident, the crankshaft, lifters, oil pump impellers, and right magneto were replaced.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The loss of engine power due to the failure of the number three connecting rod. Contributing factors were the foreign object located within the engine lubrication system, inadequate inspection of the engine by other maintenance personal, and the lack of suitable terrain for the forced landing. Full narrative available
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