What was found
CREW REPORTS ODOR IN CABIN AFTER BLEED SWITCH FROM ENG DURING TAXI IN. NSP # 1 & 2 ENGINE AND APU /COMPARTMENT NO OIL CONTAMINATION NOTED. PERFORMED WORK CARD 0550-2001 , WITH # 1 & 2 ENGINES RUNNING AND PACKS ON STARTED APU AND BLEED BRIEF ODOR FOR 30 SECONDS IN COCKPIT AND FWD CABIN . ALL OTHER CONFIG NO ODORS. PERFORMED WORK CARD 0550-2003 ESC DECONTAMINATION POST SMOKE/ FUME WITH APU OFF . SMOKE AND FUME TEST KIT (TER93579) READINGS IN COCKPIT W/APU ON WAS 4870 PARTICLES AND AFTER BURN OUT AND APU OFF DROPPED DOWN TO 210 PARTICLES WITH NO ODOR IN A/C. INSP RECIRC FANS AND REPLACED RECIRC FILTERS PER A220 AMM 21-22. APU DEFERRED TO MEL ON LOG 5445870. (LP# 5445868)