As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW CLEANING CABIN BEFORE FLIGHT, IT WAS NOTICED THAT ONE OF THE PASSENGER SEAT BELTS HAD COME LOOSE AT THE ATTACHMENT BRACKET. UPON FURTHER EXAMINATION, IT WAS NOTED THAT PN 31768 LINK ASSY HAD FAILED CAUSING THE SEAT BELT TO DETACH FROM THE SEAT.