As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT WE COULD HEAR A LOUD HUMMING NOISE FROM NOSE SECTION. AFTER LANDING, WE GOT A REAL STRONG SMELL OF BURNING. THIS PERSISTED UNTIL PARKING. AFTER SHUT DOWN WE COULD HEAR A LOUD BUZZING FROM AVIANICS BAY BLOWER FAN WAS SHUT OFF AND SMELL AND SOUND STOPPED ( BLOWER FAN (AVIONICS VENTILATION) VENT AVNCS SYS FAULT NOT DISPLAYED )--