ASN Wikibase Occurrence # 354195
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| Date: | Saturday 4 July 1998 |
| Time: | 12:45 LT |
| Type: |  Beechcraft D35 |
| Owner/operator: | Aeroways Inc. |
| Registration: | N3469B |
| MSN: | D-3695 |
| Total airframe hrs: | 5453 hours |
| Engine model: | Continental IO-470 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Driggs, ID -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Pocatello, ID (KPIH) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that while preparing for landing, he turned on to the base leg and reset the mixture, propeller and throttle controls to full forward. At this time the engine experienced a complete loss of power. The pilot attempted to restart the engine with no success. Due to the low altitude, the pilot felt that he could not make it to the runway and opted to land on a dirt road. During the landing roll, the left wing collided with a fence post. Post-crash inspection of the engine found that the spark plugs for two of the cylinders were 'fouled,' and that the piston heads for these cylinders were black and displayed excessive carbon build-up. The fuel metering unit was bench tested. During the test, it was found that at the high RPM setting, both the fuel pump pressure and the fuel flow pressure were excessively out of limits. It was also noted that contamination that appeared to be 'rubber' or a 'gasket-like' material was found on the fuel control valve, and the manifold valve screens. This substance was also found under and around the seat area on the fuel pump. Large amounts of 'particles' were also found inside the pump return fitting.
Probable Cause: Excessive pressure in the fuel control unit. A foreign material/substance found on the fuel system screens was a factor.
Accident investigation:
 |
|
Sources:
NTSB SEA98LA120
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Mar-2024 20:05 | ASN Update Bot | Added |
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