NTSB Identification: FTW97LA319. Accident occurred Tuesday,
August 19, 1997 in MONTROSE, CO Probable Cause Approval Date:
01/30/1998 Aircraft: Bell 47G-3B-2, registration: N2243W
Injuries: 2 Uninjured.   The commercial-rated student pilot was
practicing power recovery autorotations with a flight instructor
(CFI) monitoring. The rotor rpm was allowed to deteriorate,
which resulted in a hard landing. The main rotor blades flexed
downward and severed the tail boom from the helicopter. Density
altitude at the time was 11,300 feet.   failure of the flight
instructor (CFI) to properly supervise the flight and ensure
that adequate rotor rpm was maintainted during the
autorotation/landing. The high density altitude was a related
factor.  Full narrative available  Index for Aug1997 | Index of
months