Nov 25, 2003
Accident
Substantial Yuma, AZ
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR PUBU
Probable Cause
The malfunction of the rotor drive system due to improper maintenance, which resulted in the uncoupling of the drive shaft during takeoff-initial climb. A factor associated with the accident is the undertorqued drive system bolts.
NTSB LAX04TA052