Background
Prior to takeoff from a landing zone characterized by uneven, sloping, brush-covered terrain, the pilot computed the helicopter's takeoff and hover performance. The conditions resulted in a density altitude exceeding 10,000 feet. The pilot referenced the Hover Ceiling In Ground Effect chart, which indicated that the helicopter could safely depart the landing zone.
Flight
After liftoff, the pilot began moving the helicopter forward. However, the aircraft could not out-climb the up-sloping terrain. Recognizing the insufficient performance, the pilot decided to make a precautionary landing on a nearby road.
Landing Attempt
During the landing attempt, the helicopter's tail rotor lost its effectiveness. The aircraft spun around once and then descended into the terrain.
Analysis
The pilot should have used the Hover Ceiling Out of Ground Effect chart for the takeoff calculation, given the terrain. That chart would have indicated the helicopter did not have the necessary performance to safely depart the landing zone.
Outcome
The helicopter descended into the terrain after the loss of tail rotor effectiveness. The source does not specify injuries, damage, or other consequences.