As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONE EMERGENCY DESCENT SAFETY HARNESS CARABINER WAS MISSING FROM THE STOWAGE POUCH BY THE LEFT FRONT ENTRY DOOR. WHILE THE AIRPLANE WAS REMOVED FROM SERVICE (GROUNDED), A NEW SAFETY HARNESS CARABINER WAS INSTALLED INTO THE STOWAGE POUCH. THE CAUSE OF THE MISSING CARABINER IS UNKNOWN.