As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DOOR WARNING LIGHT CAME ON CLIMBING THROUGH 3500 FEET MSL. PRESSURIZATION NORMAL. LIGHT WENT OUT AFTER LANDING AND BEFORE AIRCRAFT WAS DEPRESSURIZED. *S/D* FOUND TARGET FOR AFT CARGO DOOR WARNING PROXIMITY SWITCH MISALIGNED. INSTALLED TARGET IN PROPER POSITION AND LIGHT OPERATES NORMAL.