As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DECENT, APPROX. 14,000FT HAD A RUMBLING VIBRATION SEEM TO BE IN THE NOSE OF THE AIRCRAFT FOLLOWED BY A RUBBERY/ ELECTRIC ODOR FOLLOWED BY VENT EXTRACT FAULT. MAINTENANCE REPLACED THE EXTRACT FAN IAW AMM 21-26-51 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.