Incident Summary
A helicopter performing an initial climb from a home airstrip lost engine power at approximately 350 feet and 55 mph. The pilot executed a left 90-degree autorotation to avoid power lines ahead. The helicopter landed hard, resulting in damage to the tail boom.
Pilot Account
According to the pilot, after takeoff, the engine quit during the climb. With power lines directly in the flight path, he chose to turn left and perform an autorotation. The subsequent landing was hard, causing tail boom damage.
Passenger Account
The passenger reported hearing a "pop pop" noise about 40 seconds after takeoff. The aircraft then entered a fast descent and struck the ground. The passenger sustained injuries including a burst L1 vertebra.
Examination Findings
An FAA airworthiness inspector examined the helicopter. The engine could be turned by hand without binding. Spark plugs were in good condition, and the fuel filter was clean and unobstructed, with fuel present. Flight controls moved freely. No mechanical anomalies were identified by the inspector.
Logbook Review
Review of the aircraft's maintenance logs indicated that the last annual inspection was performed on June 1, 1997.