As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INBOUND CREW SAID FUME SMELL OF GLYCOL OR FUEL WAS OBSERVED IN THE CABIN DURING FLIGHT. CORRECTIVE ACTION: PFMD STEPS 1-7 OF AMDS W/C 0550-2001. NO DISCREPANCIES FOUND W/APU ENGINE 1+2 PNEU SOURCES FOR PACKS. STEP 8 REQUIRES A220 EFIM SMELL OF FUMES W/APU AS SOURCE-ELIMINATION OF RESIDUAL ODORS TO BE ACCOMPLISHED.