As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DOOR AFT CARGO LIGHT ON EICAS. DECESION WAS MADE TO RETURN TO LAX. AIRCRAFT LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE PERFORMED FIM 52-37-00-810-839, PROXIMITY SENSORS AND TARGETS WERE OK ON AFT CARGO DOOR. PSEUS GROUND TESTS PASSED. NO PREVIOUS HISTORY, OK FOR SERVICE.