As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT FL330 THERE WAS SMOKE IN THE CABIN AT PASSENGER ROW ONE. CREW FOUND PHASE A CIRCUIT BREAKER FOR THE STANDBY RADIO RACK FAN HAD POPPED. CREW PULLED REMAINING FAN CIRCUIT BREAKERS. CORRECTIONS WERE DEFERRED PER MEL. MAINTENANCE LATER REPLACED THE FAN RELAY. CHECK-C 2-1-99 MCI.