As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARGO DOOR CAUTION CAME ON CLIMBING OUT OF APPROXIMATELY 16,000 FEET AND STAYED ON UNTIL DESCENDING OUT OF 14,300 FEET. RETURNED TO SLC. FOUND CARGO DOOR PROXIMITY SWITCH TO BE OUT OF THE .50 INCH GAP. READJUSTED CARGO DOOR HANDLE PROXIMITY SWITCH IAW MM 52-70-02. OPS CHECK OF CARGO DOOR WARNING MESSAGE CHECKS GOOD.