On April 15, 1991, a Grumman G-164B (registration N8386K) operated by Airwork Enterprises OF Fla,inc was involved in an aviation accident near Clewiston, FL. Investigators recorded the probable cause as: DISINTEGRATION OF THE IMPELLER FOR UNDETERMINED REASONS RESULTING IN THE TOTAL LOSS OF ENGINE POWER NECESSITATING THE FORCED LANDING. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
While maneuvering at 35 ft AGL, the pilot reported a total loss of engine power. After landing in a field, the aircraft nosed over and came to rest inverted. Examination revealed a disintegrated impeller.
Incident Overview
During low-altitude maneuvering at approximately 35 feet above ground level, the pilot reported that the engine experienced a complete loss of power. The pilot subsequently performed a forced landing in a field. After touchdown, the aircraft nosed over and came to rest in an inverted position.
Engine Examination
Post-accident examination of the engine revealed that the impeller had disintegrated. Fragments of the impeller were found lodged in the No. 7 cylinder assembly. Despite a detailed inspection, investigators were unable to determine the root cause of the impeller failure.
Maintenance History
The impeller assembly had been overhauled approximately 912 flight hours prior to the incident. No other relevant maintenance information was provided.
Outcome
The aircraft sustained damage from the nose-over and inverted landing. No further details regarding injuries or aircraft condition were specified in the source.