As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: ELECTRIC BURNING SMELL OUT OF FRONT VENTS IN FLIGHT DECK .ON COND PAGE OVER FLIGHT DECK AMBER FAULT LIT UP. MAINTENANCE FOUND THE LEFT HAND RECIRCULATION FAN 15HG TO BE THE SOURCE OF THE ODOR AND REPLACED IT PER AMM 21-21-51. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.