As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FRL FLT 6258 CVG-ORF. ELECTRICAL SMOKE SMELL ODOR IN COCKPIT WHEN BLEEDS ARE TRANSFERRED TO APU. MX INSPECTED AND PERFORMED RUNS OF BLEED SYSTEM COULD NOT DUPLICATE, NO DEFECTS FOUND. MX SUSPECT DE-ICE FLUID WAS SPRAYED INTO APU INLET.