As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLT 1315 - THE CARGO DOOR WARNING LIGHT CAME ON DURING CLIMB-OUT FROM DEN AT 17,500 FT. CREW FOLLOWED EMERGENCY CHECKLIST PROCEDURES AND RETURNED TO DEN WITH NO FURTHER INCIDENT. DOOR HANDLE NOT FULLY CLOSED. HANDLE WAS RECYCLED AND LIGHT WENT OUT. LIGHT STAYED OUT ON ALL SUBSEQUENT LEGS. (M)