ASN Wikibase Occurrence # 32426
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| Date: | Wednesday 23 February 1994 |
| Time: | 12:00 LT |
| Type: |  Bell TH-1L (204) |
| Owner/operator: | Hiser Helicopters Inc. |
| Registration: | N204AP |
| MSN: | 157840 |
| Year of manufacture: | 1969 |
| Engine model: | Lycoming T53-L13 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | 3,5 mi N of Etna, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE 42-DEGREE GEAR BOX FAILED SHORTLY AFTER DEPARTING ON A HELICOPTER LOGGING OPERATION. THE PILOT JETTISONED THE LOAD, BUT WAS UNABLE TO STOP THE HELICOPTER'S ROTATION AND IT CRASHED. METALLURGICAL EXAMINATION OF THE GEAR BOX REVEALED A FATIGUE BANDING PATTERN NEAR THE TOOTH ROOT OF THE INPUT GEAR.
Probable Cause: THE FAITUGE OF THE GEAR TOOTH WHICH CAUSED THE FAILURE OF THE 42-DEGREE GEAR BOX.
Accident investigation:
 |
|
Sources:
NTSB LAX94LA132
History of this aircraft
Other occurrences involving this aircraft
| 8 February 1989 | N204AP | Green Mountain Helicopter, Inc | 0 | Greenville, FL | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 26-Feb-2010 03:43 | harro | Updated [Time, Aircraft type, Operator, Total fatalities, Total occupants, Location, Country, Phase, Nature, Source, Damage, Narrative] |
| 29-Jun-2014 17:47 | TB | Updated [Aircraft type, Location, Source, Narrative] |
| 29-Jun-2014 18:03 | TB | Updated [Aircraft type] |
| 10-Apr-2024 08:48 | ASN Update Bot | Updated [Time, Cn, Operator, Other fatalities, Phase, Nature, Source, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
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