What was found
DIRTY SPONGE SMELL NOTED BY FO, CA, & JUMP SEAT PILOTS UPON APU BLEED APPLICATION AFTER LANDING. T/S MISC. SMELL IN CPIT PER AMDS WORKCARD 0550-2002 FOR ODI EVENT. INSPECTED APU & APU BLEED DUCT FOR INTERNAL LEAKAGE, NONE FOUND. INSPECTED #1 ENG HPV AREA FOR LEAKS, NONE FOUND, INSPECTED #2 ENG HPV AREA FOR LEAKS, NO LEAKS FOUND. RAN APU IN DIFFERENT PACK CONFIGURATIONS, NO SMELL NOTED FROM APU BLEED SOURCE. MCC REQUREST DUCT BURN OUT AND RECIRC FILTER CHANGE( NH 686540) REF LOG 0121208 FOR CORRECTIVE ACTION. (LP: 9535758)