What was found
WITH APU BLEED ON, OIL, DIRTY SMELL IN THE AIR FOLLOW TSM 05-50-00-810-831-A, PERFORMED A DECONTAMINATION OF THE BLEED SYS IAW AMM 21-00-00-615-802, CHANGED FILTERS. FOUND APU OIL LEAK AROUND APU INLET. CLEANED UP APU OIL, RAN APU, NO LEAKS NOTED. ATTEMPTED LEVEL -A- DECONTAMINATION IAW AMM 21-00-00-615-802-A, WITH GROUND HP CART. CART OVERHEATED & FILLED CABIN WITH NOXIOUS ODOR, APU OIL ODOR STILL PRESENT, ON APU BLEED START. ATTEMPTED DECONTAMINATION WITH ENGINE BLEEDS, NOT ABLE TO ACHIEVE TARGET ENGINE BLEED PSI AT GATE. PERFORMED LEVEL A DECONTAMINATION OF THE ECS IAW AMM 21-00-00-615-802-A. NO DEFECTS NOTED FOLLOWING RUN. ODOR GONE. REMOVED AND REPLACED RECIRCULATION FILTER IAW AMM 21-21-41.