ASN Wikibase Occurrence # 365947
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| Date: | Thursday 15 November 1990 |
| Time: | 21:30 LT |
| Type: |  Air Tractor AT-302 |
| Owner/operator: | Private |
| Registration: | N4441S |
| MSN: | 302-0101 |
| Year of manufacture: | 1977 |
| Total airframe hrs: | 4950 hours |
| Engine model: | P&W R-1340 AN1 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Somerton, AZ -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT EXPERIENCED A LOSS OF ENGINE POWER AND COLLIDED WITH THE TERRAIN DURING A SWATH RUN. EXAMINATION OF THE ENGINE REVEALED THE NUMBER 3 EXHAUST VALVE WAS CRACKED. THE ENGINE HAD 266 HOURS SINCE OVERHAUL AND HAD 20 HOURS SINCE THE LAST INSPECTION.
Probable Cause: THE FAILURE OF THE NUMBER 3 EXHAUST VALVE WHICH LED TO AN ENGINE FAILURE AND SUBSEQUENT CRASH LANDING.
Accident investigation:
 |
|
Sources:
NTSB LAX91DUJ03
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Mar-2024 15:42 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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