As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NORMAL EXHAUST FAN POWER C/B TRIPPED WHILE IN CRUISE PORTION OF FLIGHT TO SFO AT FL 34,000. PRIOR TO THE C/B TRIP THE FLIGHT ATTENDANT ADVISED OF ELECTRICAL BURNING SMELL IN ROW 5 AREA. THE FLIGHT CONTINUED TO SFO WHERE IT LANDED WITHOUT FURTHER PROBLEM. THE NORMAL EXHAUST FAN (AVIONICS AIR COOLING FAN) WAS REMOVED AND REPLACED IAW MM 21-58-12. OPERATIONAL CHECKS WERE GOOD.