As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING A DAILY INSPECTION, NOTICED AN ELECTRICAL BURN ODOR IN THE COCKPIT. FOUND THAT BOTH FANS ON BOTH TRANSFORMATOR RECTIFIER UNITS WERE NOT OPERATING RESULTING IN THE NR 1 AND 2 TRUS RUNNING HOT, AND THE NR 2 SMELLING BURNED WITHOUT HAVING ANY CAUTION LIGHTS ILLUMINATE.