What was found
FUMES ON GROUND, WITH APU BLEED ON. PERFORMED DECONTAMINATION OF THE ECS IAW AMM 21-00-00-615-002, AND 21-00-00-615-004. R & R THE NR 1 & 2 ENGINE DEOILER CASTING IAW AMM 72-60-31. R & R RECIRCULATION FILTERS IAW AMM 21-21-41. NO CABIN ODOR NOTED.