As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT NR 5164 (SFO/MRY) PILOT REPORTED THAT THE AC FAN, WHEN ON HAD A STRONG SMELL OF SOMETHING ELECTRICAL BURNING. WHEN SYSTEM WAS TURNED OFF THE SMELL WENT AWAY. THE AIRCRAFT WAS DEFERRED PER FLIGHT CREW, MEL ITEM 21-13. MAINTENANCE COULD NOT DUPLICATE. THE AIRCRAFT WAS RETURNED TO SERVICE.