As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IMMEDIATELY AFTER GEAR RETRACTION THE MAIN CARGO DOOR NOT LOCKED LIGHT ILLUMINATED ON S/O'S PANEL. PERFORMED EMERGENCY PROCEDURE PER AOM. ILLUMINATED ENTIRE FLIGHT. FOUND SHEAR PIN BROKEN. REMOVED AND REPLACED PIN P/N: 94FS494295-133 AMM 52-36-11. DOOR AND LIGHTS OPERATE AND LOCK NORMALLY.