Primary finding
Probable cause
The fuelers improper action during the refueling process.
Investigator assessment
Analysis narrative
The pilot of the helicopter reported that, he was on the ramp with the engine running to accomplish a rapid refuel. The fueler was attempting to attach the grounding cable to the helicopter and due to the cable not locking, he maneuvered the cable up and down, which then contacted the main rotor blades. The pilot reported he felt a “violent jolt” and immediately shut the engine down. The fueler’s hands were seriously injured. The main rotor blades were substantially damaged. The pilot reported that there were no preaccident mechanical failures or malfunctions with the helicopter that would have precluded normal operation.