Oct 4, 1998
Accident
Destroyed MOORPARK, CA
Injuries1 fatal
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
The improper use of the cyclic flight control by the pilot, which resulted in low g flight load condition, which resulted in rotor disk divergence (mast bumping), and the main rotor blade striking and severing the tail boom.
NTSB LAX99LA004