As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 4566 - DURING CLIMB CREW REPORTED AN ABNORMAL VIBRATION FELT IN THE CONTROL COLUMN, MORE PROMINENTLY IN FORWARD AND BACK MOTION. MAINTENANCE FOUND THE LEFT ELEVATOR PUSH PULL ROD BUSHING CORRODED. PUSH PULL ROD WAS REMOVED AND REPLACED IAW SAAB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)