Oct 4, 1996
Accident
Destroyed CANBY, OR
Injuries3 fatal
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
failure of maintenance personnel to install a cotter pin in a clevis bolt in the flight control system, which resulted in the aft directional and lateral control output pushrod to become disconnected from a bellcrank in the forward portion of the first stage mixing unit. A factor relating to the accident was the use of an improper bellcrank, which was wider in the clevis area.
NTSB SEA97FA001