ASN Wikibase Occurrence # 131676
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| Date: | Sunday 19 May 1991 |
| Time: | 09:21 LT |
| Type: |  Bell 47G-3B-1 |
| Owner/operator: | Cascade Helicopter |
| Registration: | N73903 |
| MSN: | 2883 |
| Year of manufacture: | 1963 |
| Engine model: | Lycoming TVO-435-A1A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Malott, WA -
 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 |
DURING AN AERIAL APPLICATION FLIGHT, THE ENGINE SUDDENLY LOST POWER. THE PILOT TRIED TO MANEUVER TO AN OPEN AREA, HOWEVER, THE HELICOPTER COLLIDED WITH TREES. POST CRASH INVESTIGATION REVEALED THAT THE HELICOPTER EXPERIENCED AN IN FLIGHT FIRE. IT WAS FOUND THAT A SECTION OF THE AUXILIARY FUEL PUMP CASING BROKE AWAY IN THE AREA WHERE THE FUEL LINE FITTING SCREWS INTO THE PUMP. DUE TO FIRE DAMAGE, USEFUL FACTURE TOPOGRAPHY TO DETERMINE THE MODE OF FAILURE WAS DESTROYED.
Probable Cause: AN UNDETERMINED FAILURE OF THE FUEL PUMP CASING RESULTING IN AN IN FLIGHT FIRE AND LOSS OF ENGINE POWER.
Accident investigation:
 |
|
Sources:
NTSB SEA91LA109
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 21-Apr-2024 06:28 | ASN Update Bot | Updated [Time, Other fatalities, Source, Narrative, Category, Accident report] |
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