As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED RECEIVING AN AFT CARGO DOOR EICAS AMBER CAUTION MESSAGE AT 15,000 FEET. THE CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT, ADJUSTED PROXIMITY SENSOR PX102 AND PERFORMED CHECKS IAW THE AMM. THE ACFT WAS RELEASED FOR SERVICE.