What was found
FA ADVISED FUMES IN REAR OF AIRCRAFT WHEN CONFIGURING FOR APPROACH. FUMES HAD A CHEMICAL SMELL AND MADE THEM FEEL LIGHT HEADED. T/S PER A220 SMOKE AND FUMES W/C 0550-2001. NO FAULTS IN OMS. FOUND OIL SMELL W/ #1 ENG AS BLEED SOURCE. #1 ENG HAS HISTORY OF HOC. INSPECTED #1 ENG BC3, AGB CHIPS AND R/R MAIN OIL FILTER. PER A220 AMP 79-00. NO DEFECTS. R+R L+R RECIRC FILTER PER DECONTAMINATION W/C 0550-2003. (RS 005540) C/W WORK CARD 0550- 6001 (SR 292149). C/W ECS DECONTAMINATION W/C 0550-2003. (LP# 6417752)