As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT THE MAIN CARGO DOOR WARNING ILLUMINATED ON ARRIVAL INTO DESTINATION. PERFORMED COM PROCEDURE AND DECLARED AN EMERGENCY. PERFORMED A NORMAL APPROACH AND LANDING WITHOUT FURTHER INCIDENT. R & R THE CARGO DOOR FORWARD LOCK PIN WITH A NEW PIN. ADJUSTED AND PERFORMED OPS CHECK OF CARGO DOOR LOCK SYS IAW DWG AE5345 AND DWG NR AE5660. OPS AND ADJUSTMENT CHECKS WERE BOTH NORMAL. NO OTHER DEFECTS NOTED.