As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AT APPROXIMATELY 15000 FT ON APPROACH, THE CREW EXPERIENCED AN ELECTRICAL BURNING FUME IN THE COCKPIT. CAUSE WAS AN AVIONICS VENT BLOWER FAN. NO FUMES REPORTED IN THE CABIN. BLOWER FAN (20 HQ) REPLACED IAW AMM 21-26-51 PB 401. CKD SERVICEABLE.