The National Transportation Safety Board published its preliminary report about what went wrong before a helicopter crash-landed in Downtown Honolulu.
No one was seriously injured. The two-seat aircraft demolished a parked car while skidding to a halt on Fort Street on May 8.
The NTSB report says the chopper was flying at around the 3,000-foot altitude when its engine suddenly experienced a total loss of power.
Pilot Julia Link put the chopper into an auto-rotation and maneuvered to land on the street where it wouldn't get caught in utility lines.
The chopper belonged to Mauna Loa Helicopters.
Its owner says a cable in the chopper snapped cutting off fuel to the engine.