ASN Wikibase Occurrence # 284287
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| Date: | Wednesday 12 September 2007 |
| Time: | 13:38 LT |
| Type: |  Robinson R22 BETA |
| Owner/operator: | Smith Helicopters Inc |
| Registration: | N993KC |
| MSN: | 2926 |
| Year of manufacture: | 1999 |
| Total airframe hrs: | 2114 hours |
| Engine model: | LYCOMING O&VO-360 SER |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Fort Stockton, Texas -
 United States of America
|
| Phase: | Unknown |
| Nature: | Executive |
| Departure airport: | Fort Stockton, TX |
| Fort Stockton, TX | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The single-engine helicopter experienced a hard landing after a malfunction of the belt drive system for the main rotor. The pilot had just taken off from a trailer and had transitioned to low level cruise flight when he heard a loud bang. The pilot cross-checked his engine instruments and observed the engine RPM was excessively high and the rotor RPM was below 80 percent, accompanied by the low rotor RPM warning. The pilot then initiated an autorotation and landed hard with near zero forward speed. The aircraft bounced backwards after initial impact and came to rest in the upright position. The on-scene investigation noted that one of the v-belts to the main rotor drive system had separated which caused the other belt to slip off the upper spindle. The reason for the separation could not be determined.
Probable Cause: The failure of the v-belt drive system to the main rotor for undetermined reasons. Contributing to the accident was insufficient altitude to perform a successful autorotation.
Accident investigation:
 |
|
Sources:
NTSB DFW07LA197
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 30-Sep-2022 14:29 | ASN Update Bot | Added |
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