As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO HEAT HEAT SHUTOFF VALVE STATUS MESSAGES. REPLACED AFT CARGO HEAT SHUTOFF VALVE V21441, NO HELP. DURING MAT TEST OF VALVES VISUALLY CHECKED AND VALVES OPERATING NORMALLY. REPLACED SWITCH REF 21-44-10. CHECKED GOOD REF FIM 21--44 TASKS 801-801.