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: | |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative: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:
|
| |
Investigating agency: | NTSB |
Report number: | LAX94LA132 |
Status: | Investigation completed |
Duration: | 8 months |
Download report: | Final report |
|
Sources:
NTSB LAX94LA132
History of this aircraft
Other occurrences involving this aircraft 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] |
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