As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
XNA/MEM WHILE DESCENDING THROUGH 100000FT CREW NOTICED A CHEMICAL SMELL IN THE COCKPIT CAUSING DISCOMFORT. BOTH PILOTS DONNED OXYGEN MASKS, DECLARED AN EMERGENCY, QRH FOLLOWED WITH UNEVENTFUL LANDING IN MEM. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE LEFT AND RIGHT COALESCER BAGS CONTAMINATED / DIRTY. BAGS REPLACED PER BOMBARDIER AMM 21-51-13, OPERATIONAL CHECKS PERFORMED WITH NO SYSTEM DEFECTS FOUND.