As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SFO - CARGO DOOR WARNING LIGHT ILLUMINATED AFTER ROTATION. AIRCRAFT RETURNED TO STATION WITHOUT INCIDENT. MAINTENANCE INSPECTED CARGO DOOR AND FOUND DOOR TO BE SECURE DETERMINED PROBLEM TO BE FLASE INDICATION. DEFERRED DOOR WARNING SYSTEM PER MRL 52-70-1. AIRCRAFT RETURNED TO SERVICE. MAINTENANCE SUBSEQUENTLY CLEARED THE DEFERRED DOOR WARNING SYSTEM BY ADJUSTING THE CARGO DOOR ACTUATING ROLLER. (M)