As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EWR/BOS - FLT 6240 - DURING CRUISE AT 1740 HOURS ON 3-29-98, AIRCRAFT MADE AN UNSCHEDULED LANDING AT EWR DUE TO ELEVATOR TRIM STUCK. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND CLEANED AND LUBED FRICTION LOCK CONTROLS AND LUBED ELEVATOR TRIM CONTROL, 0PS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (X)