As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE CREW REPORTED CARGO DOOR OPEN INDICATION. THE CREW MADE AN AIR-TURN-BACK. THE AC WAS INSPECTED BY MECHANIC WHO CHECKED THE PSEU`S MEMORY AND FOUND THE CARGO DOOR OVER-CENTER PROXIMITY SENSOR HAD LOGGED SEVERAL FAULTS. MECHANIC REPLACED THE PROXIMITY SENSOR. THE AC WAS RETURNED TO SERVICE WITH NO FURTHER DEFECTS. (K)