As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, THE FORWARD CARGO DOOR LIGHT ILLUMINATED. AN EMERGENCY WAS DECLARED AND RETURNED TO DEPARTURE. LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS GROUNDED. CLEANED THE FORWARD CARGO DOOR HANDLE PROXIMITY SWITCH IAW AMM 52-31-00. OPS OK.