As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:N/A CAPTAINS SEAT WILL NOT LOCK IN PLACE, IT SLID OUT OF POSITION AT BEGINNING OF T/O ROLL AND SETTING THE BRAKES AT ENGINE SHUTDOWN. SEAT WAS IN FALSE LOCK POSITION. REPLACED CAPTAIN'S SEAT ASSY IAW 25-11-01-2. OPS CHECK GOOD.