As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CARGO DOOR LIGHT ILLUMINATED DURING INITIAL CLIMB. PRESSURIZATION WAS NORMAL. LIGHT EXTINGUISHED AFTER CRUISE FLIGHT AT 10000 FL. OPERATED SEVERAL TIMES MAIN CARGO DOOR AND ALL INDICATION NORMAL IAW AMM 52-32-00-2. VISUALLY INSPECTED DOOR LATCH AND SENSOR. NO DEFECT NOTED. DOOR CLOSE PROPERLY.