As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN'S AND FLIGHT ENGINEER'S SEATS SLIPPED OUT OF THE LOCKED POSITIONS DURING TAKEOFF. CLEANED FLIGHT ENGINEER'S SEAT TRACKS AND LUBED SEAT LOCKING PINS. REPLACED CAPTAIN'S SEAT IAW DC8 MM. OPS CHECK GOOD FOR CAPTAIN'S AND FLIGHT ENGINEER'S SEATS LOCKING IN POSITION.