ASN Wikibase Occurrence # 354792
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| Date: | Thursday 19 February 1998 |
| Time: | 11:00 LT |
| Type: |  Grumman G-164B Ag-Cat |
| Owner/operator: | Private |
| Registration: | N48493 |
| MSN: | 49B |
| Total airframe hrs: | 3388 hours |
| Engine model: | P&W R-985 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Stanwood, WA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | Burlington, WA (75S) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that while engaged in aerial spraying, approximately 30 minutes after takeoff and 15 minutes after beginning to spray, he noted a reduction in engine power. He advanced the throttle, at which point the engine 'sputtered' and 'popped' a few times and then quit. The pilot performed a forced landing into a field. The airplane encountered soft terrain during the forced landing roll and flipped over. The pilot stated he did not use carburetor heat at the time. Post-accident examination of the engine did not reveal any abnormalities, and the operator successfully test-ran the engine following the accident. Temperatures of 7 to 9 degrees C and dewpoint of 6 degrees C were reported at two nearby weather reporting stations during the accident time frame. This temperature/dewpoint combination represents a hazard of 'serious [carburetor] icing at cruise power', according to FAA data.
Probable Cause: The pilot's failure to apply carburetor heat. Factors included carburetor icing conditions and soft terrain in the forced landing area.
Accident investigation:
 |
|
Sources:
NTSB SEA98LA038
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Mar-2024 18:24 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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