As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED AN ENGINE 1 FUEL HEAT SYSTEM FUEL RETURN VALVE OPEN FAULT MESSAGE. THE AIRCRAFT WAS GROUNDED. REPLACED THE 1ENGINE FUEL DIVERTER AND RETURN VALVE IAW AMM 73-13-42-400-010-A AND ACCOMPLISHED A SATISFACTORY LEAK & OPS CHECK.