Nov 3, 2015
Accident
Substantial San Antonio, TX
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 135
Probable Cause
The failure of the No. 3 tail rotor adapter and shaft due to a loss of torque on the retaining nut. Contributing to the accident was the lack of a requirement to inspect the tail rotor assembly for security in the helicopter manufacturer's maintenance manual and the operator's approved aircraft inspection program.
NTSB CEN16LA027