As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARGO DOOR WARNING LIGHT CAME ON IN FLIGHT DURING THE START OF THE DESCENT TO THE NEXT STATION. ATC WAS NOTIFIED. THE LIGHTS STAYED ON FOR APPROXIMATELY 10 MINUTES. DOOR CLOSING PROCEDURES, DOOR HARD TO CLOSE, DOOR CLICK CLACK RIGGING/LUBRICATION, OR SWITCH RIGGING. ALL CLICK CLACKS AND MICRO SWITCHES. NO DEFECTS NOTED. AN OPERATIONAL CHECK FLIGHT WAS COMPLETED WITH NO DISCREPANCIES. AIRCRAFT WAS RETURNED TO SERVICE. (K)