Primary finding
Probable cause
The pilot's failure to ensure adequate clearance from terrain while landing on sloped terrain.
Investigator assessment
Analysis narrative
The helicopter had been dispatched to pickup and transport two ground crew members to a new location. The pilot positioned the helicopter with the front skids into up sloping terrain when the main rotor blades impacted a large boulder. The helicopter pitched back, rolled onto its right side, and slid down the hill before it came to a rest. During the accident sequence, the helicopter sustained substantial damage to the fuselage. The pilot reported no preimpact mechanical malfunctions or failures with the helicopter that would have precluded normal operation.
Source record
Factual narrative
The helicopter had been dispatched to pickup and transport two ground crew members to a new location. The pilot positioned the helicopter with the front skids into up sloping terrain when the main rotor blades impacted a large boulder. The helicopter pitched back, rolled onto its right side, and slid down the hill before it came to a rest. During the accident sequence, the helicopter sustained substantial damage to the fuselage. The pilot reported no preimpact mechanical malfunctions or failures with the helicopter that would have precluded normal operation.