ASN Wikibase Occurrence # 36247
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| Date: | Saturday 11 December 1993 |
| Time: | 18:15 LT |
| Type: |  Beechcraft M35 Bonanza |
| Owner/operator: | Bertschinger, Gregory A. |
| Registration: | N9864R |
| MSN: | D-6413 |
| Engine model: | CONTINENTAL IO-470-C |
| Fatalities: | Fatalities: 3 / Occupants: 3 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Chapel Hill, NC -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | |
| Manteo, NC (KMQI) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
AT ABOUT 2500 FEET, SHORTLY AFTER DEPARTURE, THE PILOT REPORTED TO ATC THAT HE WAS EXPERIENCING ENGINE PROBLEMS AND NEEDED TO RETURN TO THE AIRPORT. THE PILOT WAS GIVEN A WESTERLY HEADING TO THE AIRPORT, BUT HE REPORTED HE DID NOT HAVE SUFFICIENT ALTITUDE TO REACH THE AIRPORT. THE AIRCRAFT IMPACTED THE TERRAIN IN A WOODED AREA ABOUT 15 FEET WEST OF AN OPEN FIELD. THE AIRCRAFT FUSELAGE WAS CONSUMED IN THE POST CRASH FIRE. EXAMINATION OF THE ENGINE REVEALED THAT THE CONNECTING ROD END BUSHINGS HAD NOT BEEN BORED TO THE PROPER DIAMETER. THE ENGINE CRANKSHAFT FRACTURED FOLLOWING HEAT STRESS FROM THE CONNECTING ROD RUBBING AGAINST THE CRANKSHAFT CHEEK.
Probable Cause: The improper engine overhaul by maintenance personnel. A factor in the accident was the failure of the engine crankshaft.
Accident investigation:
 |
|
Sources:
NTSB ATL94FA030
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:22 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Apr-2024 09:45 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Destination airport, Source, Narrative, Category, Accident report] |
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