As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DURING DESCENT BETWEEN 17000 AND 11000FT THERE WAS A VIBRATION AND GRIND SOUND FROM BENEATH THE FLIGHT DECK. SIMULTANEOUSLY AN ELECTRICAL BURNING SMELL WAS EXPERIENCED IN THE COCKPIT AND CABIN DIMINISHED OUT OF 11000 FT. REPLACED EQUIP. BLOWER FAN IAW AMM 21-26-51.