As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REQUEST INSPECTION FOR SMOKE ODOR IN COCKPIT. HEARD GRINDING NOISE FROM DISPLAY OR ARNIC FAN. INSPECTED AIRCRAFT AND TESTED AVIONIC COOLING SYSTEM PER CRJ AMM 21-24-00-710-801. REPLACED DISPLAY FILTER. COULD NOT DUPLICATE PROBLEM. NO SMOKE ODOR. NO NOISE. REMOVED AND REPLACED DISPLAY COOL FAN. (M)