As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NON-ETOPS FLIGHT 482 SNA-RNO - AFTER TAKEOFF, THE CREW NOTED THE AFT CARGO DOOR OPEN INDICATION ILLUMINATED. CREW RETURNED TO SNA WITHOUT FURTHER INCIDENT. MAINTENANCE DEFERRED THE AFT CARGO DOOR INDICATION PER MEL 52-3-1 AND VERIFIED THE DOOR WAS CLOSED AND LOCKED FOR FLIGHT. AIRCRAFT WAS RETURNED TO SERVICE.