As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FRL FLT 6181 CVG- SYR. STRANGE SMELL IN CABIN, AT THE TIME THE AC WAS RUNNING ON APU BLEED USING PACK 2. MX TROUBLESHOT AND COULD NOT FIND ANY PROBLEMS. MX REPORTED THAT THE SMELL WAS THAT OF DE-ICE FLUID. CHECKED THE APU FOR LEAKS AND RAN PACKS WITH NO DEFECTS NOTED.