As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RDU - FLT 174 - DURING CRUISE, FORWARD CARGO OVERHEAT STATUS MESSAGE AND OVERHEAD LIGHT ILLUMINATED IN FLIGHT. AIR INTERRUPTED BACK TO RDU AND LANDED WITHOUT INCIDENT. NO SIGN OF SMOKE OR HOT CONDITION. SECURED CANNON PLUG ON TEMPERATURE SWITCH. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)