What happened
During a routine logging operation, two ground attendants were riding on the cable when an accidental release of the cable occurred. As a result of this release, both individuals fell to the ground. The incident involved a helicopter equipped with a cargo hook system commonly used for such operations.
The investigation
Following the accident, investigators conducted a thorough examination of the aircraft's hook mechanism. The inspection did not reveal any evidence of a system failure or mechanical malfunction within the hook assembly itself. The physical components appeared to be functioning as designed without internal defects.
Findings
The primary factor in this accident was that the pilot was not aware that two ground attendants were riding the cable during the operation. While the examination found no fault with the aircraft equipment, it was noted that similar occurrences have taken place in situations involving both civilian and military helicopters which were equipped with hooks. This suggests a recurring risk associated with the practice of personnel riding cargo lines rather than a specific mechanical defect in this instance.
Safety message
Pilots must ensure they are fully aware of all personnel positions during logging operations. Riding on cables presents significant risks, and operators should be vigilant about similar occurrences reported in both civilian and military helicopter fleets.