Robinson R22
Sterling City, TX — June 17, 2018
Event Information
| Date | June 17, 2018 |
| Event Type | ACC |
| NTSB Number | CEN18CA294 |
| Event ID | 20180725X25209 |
| Location | Sterling City, TX |
| Country | USA |
| Coordinates | 31.83306, -100.98083 |
| Highest Injury | NONE |
Aircraft
| Make | Robinson |
| Model | R22 |
| Category | HELI |
| FAR Part | 091 |
| Aircraft Damage | SUBS |
Conditions
| Light Condition | DAYL |
| Weather | VMC |
Injuries
| Fatal | 0 |
| Serious | 0 |
| Minor | 0 |
| None | 1 |
| Total Injured | 0 |
Event Location
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.
Full Narrative
The pilot reported to the Federal Aviation Administration Inspector that he was working with the land owner to conduct cattle herding with the helicopter. He landed in the field and got out to speak with the land owner about the flight. The pilot left the helicopter at idle power when he exited. While speaking to the land owner, the collective/throttle increased and the helicopter rocked back on the tail, separating the tail rotor. The main rotor blades were then damaged when the helicopter settled back down.The helicopter received substantial damage to the tail rotor and main rotor blades.
Robinson Helicopter's issued Safety Notice SN-17 in November 1984, revised June 1994, which stated:
NEVER EXIT HELECOPTER WITH ENGINE RUNNING
Several accidents have occurred when pilots momentarily left their helicopters unattended with the engine running and rotors turning. The collective can creep up, increasing both pitch and throttle, allowing the helicopter to lift off or roll out of control.
About This NTSB Record
This aviation event was investigated by the National Transportation Safety Board (NTSB). NTSB investigates all U.S. civil aviation accidents to determine probable cause and issue safety recommendations to prevent future accidents.