As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL BURNING SMELL ON FLIGHT DECK FOLLOWED BY FWD EQ EXHAUST FAN C/B POPPING AND EICAS MSG. SMELL DISSIPATED AFTER C/B POPPED. EXHAUST FAN C/B POPPING AND EICAS MSG. SMELL DISSIPATED AFTER C/B POPPED. REPLACED EXHAUST FAN. SMELL GONE, OK FOR SERVICE. SUSPECT FAILED BEARINGS IN EXHAUST FAN.