As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DOOR CAUTION MESSAGE WITH PROXIMITY SYS FAULT 2 STATUS MGS DURING CLIMB. RETURNED. LANDING WT 66,800 LBS. PERFORMED ADJUSTMENT OF AFT BAGGAGE BAY DOOR PROXIMITY SENSOR PX102. IAW AMM TASK 52-70-02-820-802. SENSOR PLACED AT .025 IN. CLEARENCE. NO FURTHER DEFECTS. OPS CK IAW AMM TASK 52-31-00-710-801. OPS CK GOOD. NO DEFECTS NOTED. RETURNED TO SERVICE.