What was found
CABIN ODOR: WHEN APU IS RUNNING AND PACKS ARE SELECTED ON THE CABIN AND COCKPIT SMELL LIKE DIRTY CLOTH. THE SMELL GOES AWAY AT ALTITUDE. CORRECTIVE ACTION: REMOVED LH ACM P/N: 586110-9, S/N: 4877 INSTALLED CUSTOMER SUPPLIED REPAIRED LH ACM P/N: 586110-9, S/N: 4262 REMOVED RH ACM P/N: 586110-9, S/N: 3750 INSTALLED CUSTOMER SUPPLIED REPAIRED RH ACM P/N: 586110-9, S/N: 48-3161 REMOVED LH AND RH COALESCER P/N:180849-28 S/N: N/A. INSTALLED CUSTOMER SUPPLIED LH AND RH COALESCER P/N:180849-28, S/N: N/A. WORK PERFORMED IN REF TO CL-650 AMM 21-51-16 OPS AND LEAK CHECKS GOOD.