As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TRANSIT CHECK IT WAS NOTED THAT THE FLOATATION VALVE WAS MISSING. INVESTIGATION FOUND THE VALVE RELOCATED AMONG THE ELEVATOR CABLES. IT WAS FOUND TO HAVE WORN THROUGH ITS PIANO HINGE. PIANO HINGE WAS STILL ATTACHED TO MOUNTING SIDE OF THE HINGE. INSP C/OUT AND FLOATATION VALVE REPLACED AND ACFT RETURN TO SERVICE.