As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 1850 - AFTER TAKEOFF FROM CLT, CREW RECEIVED NR 1 FUEL HEAT LIGHT AND NR 1 OIL TEMPERATURE ROSE INTO THE YELLOW ARC. CREW REDUCED POWER TO ENGINE. FLIGHT RETURNED TO CLT AND LANDED WITH NO FURTHER INCIDENT. MAINTENANCE FOUND PIN IN FUEL HEAT VALVE CONNECTOR D1004 PUSHED BACK. CONNECTOR WAS REPAIRED. (X)