Air carrier maintenance controller reported that flight crew notified them that the pilot seat unlocked and moved during a go-around wind-shear maneuver.

Narrative

Aircraft was operating a flight from ZZZ [airport] to ZZZ1 [airport] and diverted to ZZZ2 [airport] due to weather. In ZZZ2; the crew notified Maintenance Control that the CA seat unlocked and moved during a go-around windshear maneuver. The CA seat might have also unlocked previously but unable to recall. The controller had the CA sit in the seat; move the seat rail locking control; move the seat to each positioning hole and make sure seat locked in place. Additionally; the controller also had the CA violently move the seat around to try and have seat unlock from the locked position at each positioning hole. The seat did not unlock from the locked position. The controller explained that ZZZ2 maintenance could come out and perform the same task. Further discussion with the CA determined that would be unnecessary since it would be the same results. The CA and controller mutually agreed to continue to ZZZ1 and have ZZZ1 maintenance investigate further. A discrepancy was made when the A/C arrived in ZZZ1. Maintenance disassembled the locking pins on each side of the seat and found a broken spring for one of the two locking pins. The spring was replaced and there have been no further similar discrepancies. In hindsight; the controller should have made an irregularity report in Maintenance Tracking Computer System for the CA seat moving in ZZZ2 and a follow-up for the seat to be inspected further at next line station for better documentation.Root cause narrative: Failure of the crew and controller to understand the significance of a pilot seat unlocking in flight.Suggestion: Discrepancy should have been made for the CA seat unlocking in flight so contract maintenance could inspect and sign-off in ZZZ2. Follow-up made for further troubleshooting for seat unlocking at next line station or RON (Routine Overnight) maintenance base.