Feb 21, 2002
Accident
Substantial Glendora, CA
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
The student's failure to maintain adequate main rotor rpm, and the flight instructor's inadequate supervision. Contributing factors were the high helicopter gross weight and density altitude, and the descending mountainous terrain.
NTSB LAX02FA088