As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT THE UPPER DECK MAIN CARGO DOOR NOT LOCKED LIGHT ILLUMINATED ON S/O'S PANEL ALONG WITH THE DOORS LIGHT ON THE MASTER WARNING PANEL (MWP). PERFORMED EMERGENCY PROCEDURE IAW AOM. INSTALLED NEW BUSHING AND NEW PIN AS PER M/M 52-33-00, OPS CHECKED OK.