ASN Wikibase Occurrence # 364582
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| Date: | Tuesday 3 September 1991 |
| Time: | 09:53 LT |
| Type: |  Cessna 208 |
| Owner/operator: | Markair Express Inc. |
| Registration: | N9438F |
| MSN: | 00053 |
| Total airframe hrs: | 4080 hours |
| Engine model: | P&W PT6A-114 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Dillingham, AK -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT IN COMMAND PERFORMED A PREFLIGHT AND CHECKED THE OIL BY REMOVING THE DIP STICK/OIL FILLER CAP. AFTER 10 TO 15 MINUTES OF FLIGHT TIME, THE PILOT NOTICED A DECREASE IN THE TORQUE INDICATION AND ENGINE OIL PRESSURE. HE ELECTED TO RETURN TO DILLINGHAM AND ENROUTE THE ENGINE LOST MORE OIL PRESSURE AND 'COUGHED' TWICE AND THE PILOT FEATHERED THE PROPELLER AND LANDED ON THE TUNDRA. UPON LANDING THE AIRPLANE NOSED OVER. THE ON SITE INSPECTION SHOWED THAT THE LEFT, LOWER SIDE OF THE FUSELAGE WAS COVERED WITH OIL AND THE OIL DIP STICK/FILLER CAP WAS NOT INSTALLED IN THE FILLER NECK. IT WAS RESTING ON THE INSIDE OF THE UPPER COWLING BECAUSE THE AIRPLANE WAS UPSIDE DOWN. THE BRIEF SHOWS THAT THE PILOT WAS THE HOLDER OF AN AIRLINE TRANSPORT PILOT CERTIFICATE BECAUSE THE COMPUTER DATABASE PROGRAM WILL NOT ACCEPT A COMMERCIAL PILOT RATING WHILE SHOWING A SCHEDULED 14 CFR 135, PASSENGER/CARGO TYPE OF OPERATION. THE PILOT IS ONLY THE HOLDER OF A COMMERCIAL PILOT CERTIFICATE.
Probable Cause: THE PILOT'S INATTENTIVE PREFLIGHT INSPECTION WHICH RESULTED IN HIS FAILURE TO PROPERLY SECURE THE ENGINE OIL TUBE FILLER CAP RESULTING IN THE LOSS OF ENGINE OIL AND OIL PRESSURE AND THE PILOT'S FAILURE TO PROPERLY COMPENSATE FOR WIND CONDITIONS DURING THE FORCED LANDING. CONTRIBUTING TO THE ACCIDENT WAS THE ENGINE FAILURE AND SUBSEQUENT FORCED LANDING ON SOFT TERRAIN.
Accident investigation:
 |
|
Sources:
NTSB ANC91FA142
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Mar-2024 16:38 | ASN Update Bot | Added |
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