ASN Wikibase Occurrence # 147261
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| Date: | Tuesday 31 July 2012 |
| Time: | 09:20 |
| Type: |  Fairchild Hiller FH-1100 |
| Owner/operator: | Eclipse Helicopter Services |
| Registration: | N5038F |
| MSN: | 186 |
| Year of manufacture: | 1969 |
| Total airframe hrs: | 2250 hours |
| Engine model: | Allison 250-C18 |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Near Cody, Wyoming -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Cody, WY |
| Cody, WY | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that while in cruise flight, the rear of the helicopter suddenly began to vibrate. He performed an autorotation to a field, and the helicopter landed hard. The tailboom and main transmission mounts were substantially damaged. The pilot reported that a tail rotor driveshaft coupling had split in half, which resulted in a loss of tail rotor drive. Postaccident examination of the tail rotor driveshaft coupling revealed that the coupling failure was initiated by fatigue cracking. A complete history of the part was not available; therefore, the total time in service of the part could not be determined.
Probable Cause: The failure of a tail rotor driveshaft coupling due to fatigue.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 31-Jul-2012 11:26 | gerard57 | Added |
| 31-Jul-2012 13:41 | Anon. | Updated [Operator, Total occupants, Source, Damage] |
| 01-Aug-2012 01:33 | gerard57 | Updated [Aircraft type, Registration, Narrative] |
| 01-Aug-2012 01:50 | gerard57 | Updated [Aircraft type] |
| 01-Aug-2012 08:17 | Geno | Updated [Time, Cn, Operator, Phase, Source, Narrative] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 20:57 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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