As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, PILOT REPORTED INDICATION OF AFT AVIONICS DOOR. THE AC WAS DIVERTED. AFTER LANDING, INSPECTION OF THE DOOR WAS PERFORMED AND FOUND IT PROPERLY CLOSED AND INDICATIONS WERE NORMAL. ALSO PERFORMED PROXIMITY SENSORS CLEANING AND INSTALLATION OF THE TARGET AT CONTROL LEVER IAW MM 52-35-13; OPERATIONALLY TESTED SEVERAL TIMES, NORMAL IAW MM. ADDITIONALLY, THE DOOR HAS BEEN CONFIRMED CLOSED AND LOCKED. THE AIRCRAFT RETURNED TO NORMAL OPERATIONS.