As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 2378 - EN ROUTE DFW-ORD, NUMBER ONE LOAD INDICATOR READ ZERO LOAD AND NUMBER TWO LOAD INDICATOR READ .8 LOAD. BURNING SMELL NOTED AND DC BUS TIE WAS CLOSED. SMELL DISSIPATED AND K1 CIRCUIT BREAKER WAS POPPED. REPLACED NUMBER 1 TRANSFORMER RECTIFIER. SYSTEM GROUND CHECK NORMAL OPERATION. (M)