ASN Wikibase Occurrence # 223406
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| Date: | Sunday 17 June 2018 |
| Time: | : |
| Type: |  Robinson R22 |
| Owner/operator: | Concho Aviation Llc |
| Registration: | N410MM |
| MSN: | 3599 |
| Year of manufacture: | 2004 |
| Engine model: | Lycoming O-360 SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Sterling City, TX -
 United States of America
|
| Phase: | Standing |
| Nature: | Executive |
| Departure airport: | Sterling City, TX |
| Sterling City, TX | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot exited the helicopter with the engine set to idle power. Subsequently, the collective/throttle increased due to the engine vibrations, and the helicopter became light on the skids. The helicopter rocked back on the tail, which separated the tail rotor from the helicopter and damaged the main rotor blades. The manufacturer had previously issued a safety notice, which stated to never exit the helicopter unattended with the engine running and the rotors turning because the collective can “creep up, increasing both pitch and throttle, allowing the helicopter to lift off or roll out of control,” as occurred in this accident.
Probable Cause: The pilot’s improper decision to exit the helicopter without shutting down the engine, which allowed the collective/throttle to increase and resulted in a loss of control of the unattended helicopter.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 23-Mar-2019 09:02 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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