As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: FIRST OFFICER'S SEAT VERY DIFFICULT TO ADJUST POSITION FORWARD AND AFT. SEAT WILL NOT MOVE INTO ANY OF THE FORWARD 15 POSITIONS EASILY. REMOVE AND REPLACED FIRST OFFICER AFT SEAT TRACKS. PER AMM 25-11-11 AND FIRST OFFICER SEAT PER AMM 25-11-01. OPERATIONAL CHECK GOOD.