Jan 23, 1998
Incident
MIAMI, FL
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
An inadequate service bulletin which did not require measurement of the cyclic trim assembly shaft and did not identify all helicopters in which shaft wear could lead to restricted movement of the lateral cyclic trim.
NTSB ATL98IA039