ASN Wikibase Occurrence # 293719
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| Date: | Monday 30 May 2005 |
| Time: | 20:15 LT |
| Type: |  Beechcraft A-36 |
| Owner/operator: | Private |
| Registration: | N9017V |
| MSN: | E-274 |
| Total airframe hrs: | 4500 hours |
| Engine model: | Continental IO-550-B |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Tacoma, Washington -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Tacoma Narrows Airport, WA (TIW/KTIW) |
| Tacoma Narrows Airport, WA (TIW/KTIW) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
After flying in the local area for about 20 minutes, the pilot entered the VFR traffic pattern, and after turning on base leg the aircraft's engine suddenly lost all power. He was therefore forced to execute a power-off landing in an open field, where the aircraft's nose gear encountered some soft terrain and collapsed. A post-accident inspection determined that there was sufficient uncontaminated 100LL fuel on board. During a series of test runs, the engine ran extremely rough at rpm's below 1,500, and it quit a number of times during the run. The engine smoothed out some when the fuel boost pump was turned on to the low position, and smoothed out even more when the pump was turned to the high position. The un-metered fuel pressure was measured, and although it was lower than the specification directed, it was not low enough to account for the very rough running engine. At the end of the series of test runs, the spark plugs were removed, and their white ashy color confirmed that the engine was running extremely lean. Further flow tests and inspections were performed on the fuel system components after they were removed from the aircraft, but the results of these tests did not reveal any anomalies that would be expected to cause the engine to run rough or quit while on a reduced power approach. In addition, the fuel pump was tested to ensure that there was no air leaking past the shaft seal, and the results of that test was negative. At the completion of the testing/inspection process, it could not be clearly determined what was causing the engine's fuel system to run so lean.
Probable Cause: The malfunction of the fuel injection control system, for undetermined reasons, while the aircraft was on base leg for a full-stop landing. Factors include soft terrain in the area where the pilot found it necessary to perform a forced landing.
Accident investigation:
 |
|
Sources:
NTSB SEA05LA110
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Oct-2022 12:40 | ASN Update Bot | Added |
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