ASN Wikibase Occurrence # 352505
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| Date: | Wednesday 29 September 1999 |
| Time: | 18:40 LT |
| Type: |  Enstrom 280C |
| Owner/operator: | Private |
| Registration: | N84DH |
| MSN: | 1055 |
| Year of manufacture: | 1976 |
| Total airframe hrs: | 688 hours |
| Engine model: | Lycoming HIO-360-E1AD |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Longmont, CO -
 United States of America
|
| Phase: | Approach |
| Nature: | Training |
| Departure airport: | (2V2) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While practicing autorotations, the pilot, who was a commercial pilot in single and multiengine aircraft but a student pilot in helicopters, experienced a loss of engine power for unknown reasons. During the full autorotation, which was necessitated by the power loss, the landing was hard and resulted in main rotor flex, which cut off the tail boom. Density altitude at the time was 9,000 feet.
Probable Cause: An inaccurate touchdown during a full autorotation, which resulted in main rotor flex which cut off the tail boom. Factors were the pilot's lack of total experience in helicopters and high density altitude.
Accident investigation:
 |
|
Sources:
NTSB DEN99LA173
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 07-Mar-2024 20:28 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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