Mar 11, 1998
Incident
ANCHORAGE, AK
InjuriesNone
Phase of Flight-
ConditionsUnk
OperationFAR 091
Probable Cause
The dynamic imbalance in the yaw rate gyro, which provided input to the yaw damper and rudder. A factor was the deteriorated grease in the gyro bearings.
NTSB ANC98IA026