What was found
AIRCRAFT WAS GNDED. FLIGHT ATTENDANTS REPORTED AN ODOR IN THE CABIN, LATE IN THE FLIGHT, WHICH WAS THROUGHOUT THE CABIN & SMELLED LIKE DE-ICE FLUID, BUT THE ACFT WAS NOT DE-ICED PRIOR TO THE FLIGHT & SOME DESCRIBED IT AS A ELEC SMELL. ACCOMPLISHED A330 TROUBLESHOOTING CABIN AIR QUALITY JC 33L00021001. INSPECTED APU COMPARTMENT, INLET & EXHAUST, NO LEAKS. INSPECTED AIRFRAME, NO LEAKS EVIDENT, R & R 8 EACH HEPA RECIRCULATION FILTERS IAW AMM 22-21-41. RAN BOTH ENGS & APU IN BLEED PACK CONFIGURATIONS, NO ODORS DETECTED.