ASN Wikibase Occurrence # 360325
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| Date: | Sunday 12 June 1994 |
| Time: | 13:00 LT |
| Type: |  Beechcraft P35 |
| Owner/operator: | Srq Flyers, Inc. |
| Registration: | N982Q |
| MSN: | D-6846 |
| Year of manufacture: | 1961 |
| Total airframe hrs: | 4142 hours |
| Engine model: | CONTINENTAL IO-470-N |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Bluffton, SC -
 United States of America
|
| Phase: | Approach |
| Nature: | Private |
| Departure airport: | Sarasota, FL (KSRQ) |
| Garner, NC (NC99) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING CRUISE FLIGHT, THE PILOT OBSERVED A LOSS OF OIL PRESSURE, ACCOMPANIED BY THE SMELL OF BURNING OIL. THE PROPELLER OVERSPED, AND THE ENGINE SUBSEQUENTLY QUIT. THE AIRPLANE WAS FORCE LANDED ON A GOLF COURSE, AND COLLIDED WITH TREES DURING THE LANDING ROLL. AN EXAMINATION OF THE ENGINE REVEALED THE THREADS ON THE OIL FILTER ADAPTER, AND THE MATING THREADS ON THE ENGINE CASE, WERE SEVERELY FRETTED, AND OIL HAD LEAKED OUT OF THE ENGINE, AROUND THE ADAPTER THREADS. THERE WAS EVIDENCE OF OIL STARVATION AND THERMAL DISTRESS ON INTERNAL ENGINE PARTS. EVIDENCE SUGGESTS THAT THE JAM NUT WHICH TIGHTENS THE ADAPTER TO THE ENGINE CASE EITHER LOST ITS PRELOAD TORQUE, OR WAS UNDERTORQUED DURING MAINTENANCE. LOGBOOK ENTRIES INDICATING THE LAST MAINTENANCE ON THE ADAPTER WERE NOT LOCATED.
Probable Cause: A LOSS OF ENGINE POWER DUE TO OIL STARVATION. THIS RESULTED FROM AN UNDERTORQUED CONDITION OF THE OIL FILTER ADAPTER, AND THE SUBSEQUENT FRETTING OF THE ADAPTER THREADS.
Accident investigation:
 |
|
Sources:
NTSB ATL94LA120
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Mar-2024 20:32 | ASN Update Bot | Added |
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