What was found
CREW MENTIONED DIRTY SOCK SMELL THROUGHOUT ALL PHASES OF FLIGHT. TURN ON APU BLEED AND SMELLED FUMES AROUND MID CABIN. PERFORMED P TRAK INITIAL RUNS REF AMDS 0550-2001 RESULTS SENT TO MCC (A. HERMS 948587) C/W MSI LOG 1723981 STEP'S A-G RECORD'S SENT TO MCC STILL REQUIRES STEPS H-L TO BE C/W. CONTAMINATION WAS FOUND IN APU INLET. PER MCC, C/W WORK CARD 2100-2005; REF LOG 9080480. C/W STEPS H-L. ODOR WAS ELIMINATED ON SECOND P-TRAK RUN W/ APU UNUSED. FWD APU TO MEL 49 -10-01A AND PLACARD. (M) PROC. C/W. DISPATCH GRANTED. ALL MSI PROC. C/W. (LP: 9080478, AIRCRAFT WAS GROUNDED)