ASN Wikibase Occurrence # 32378
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| Date: | Friday 27 May 1994 |
| Time: | 14:00 LT |
| Type: |  Bell 204B |
| Owner/operator: | Westerberg, Dennis & Sloane |
| Registration: | N911SW |
| MSN: | 2025 |
| Year of manufacture: | 1965 |
| Total airframe hrs: | 12884 hours |
| Engine model: | Lycoming T53-13B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | 38 miles N of Libby, MT -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
JUST AFTER LIFTING A SINGLE-LOG EXTERNAL LOAD, THE HELICOPTER EXPERIENCED A FAILURE OF THE 42 DEGREE GEAR BOX INPUT PINION GEAR. THE PILOT RELEASED THE LOAD, AND BEGAN AN EMERGENCY DESCENT IN ORDER TO ATTEMPT A FORCED LANDING IN THE MOUNTAINOUS/HILLY TERRAIN. WHILE ATTEMPTING TO INITIATE THE LANDING FLARE, THE AIRCRAFT IMPACTED THE TERRAIN.
Probable Cause: THE FATIGUE FRACTURE OF THE 42 DEGREE GEAR BOX INPUT PINION. FACTORS INCLUDE UNSUITABLE, MOUNTAINOUS/HILLY TERRAIN.
Accident investigation:
 |
|
Sources:
NTSB SEA94LA128
History of this aircraft
Other occurrences involving this aircraft
| 27 August 1985 | N204RH | Rogers Helicopter, Inc. | 0 | East Clovis, CA | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 19-Jan-2011 06:48 | harro | Updated [Time, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Source, Damage, Narrative] |
| 10-Apr-2024 07:15 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Nature, Source, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
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