What was found
AFT FLIGHT ATTENDANTS NOTICED AN ACRYLIC/OIL SMELL IN THE BACK OF THE A/C AFTER LANDING POSSIBLY DURING APU START. C/W WORK CARD 0550-2001. NO ODOR FOUND (AM 421257) C/W REMOVED AND REPLACED RECIRCULATION FILTERS PER A220 AMP BD500 A-J21-22 ( EC 073168), PERFORMED GVI OF BOTH ENGINES PER A220 AMP 72-00, NO DEFECTS NOTED, PERFORMED BOTH ENGINE IDLE RUNS PER A220 AMP 71- 00, NO ODORS PRESENT. OK FOR SERVICE. (LP# 6013195)