As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BULK CARGO TEMP STARTED AT 51 DEGREES F IN THE VENT MODE AT INITIAL CRUISE. DECREASED THROUGHOUT THE FLIGHT TO AS LOW AS 44 DEGREES F. TROUBLESHOT IAW FIM 21-44 FAULT TREE 810 AND FOUND AIR SUPPLY TUBE CLOGGED. REMOVED ALL BLOCKAGES. SECURED THE TUBE AND PERFORMED OPS CHECK OF BULK CARGO TEMP VENTILATION AND HEATING SYSTEM. OPS CHECKED GOOD. OK FOR SERVICE.