What was found
(AIRCRAFT NOT GROUNDED) DIRTY SOCK SMELL IN THE FORWARD CABIN & COCKPIT. TRIED TO ISOLATE THE SMELL TO A SINGLE PACK BUT WAS UNABLE./ REMOVED & REPLACED FWD GALLEY FILTER IAW AIM ALTITUDE CMM 25-35-82. REMOVAL OF APU S/N P-7682, PER AMM 49-11-11-000-004, PERFORMANCE OF AMM 49-00-00-100-805-A - CLEANING OF THE APU COMPARTMENT WITHOUT THE APU INSTALLED, PERFORMED OF AMM 49-16-00-100-005-A - CLEANING OF THE APU AIR INTAKE (131-9(A)), INSTALLATION OF A SERVICEABLE APU REF AMM 49-11-11-400-004, PERFORMANCE OF AMM 36-12-00-615-802-A02 - DECONTAMINATION OF THE BLEED-AIR DUCTING SYSTEM DISCONNECTED AT THE APU LOAD-COMPRESSOR VALVE WITH THE ENGINE-2 BLEED PRESSURE, AND THE GROUND SUPPORT EQUIPMENT (GSE) TCT INSTALLED AND APU-DUMMY CHECK-VALVE , ACCOMPLISHMENT OF TASK CARD 21-000-003. NO ODORS DETECTED. APU MEL CLEARED ON LP 1662072. REMOVAL OF APU, PER AMM 49-11-11-000-004, PERFORMANCE OF AMM 49-00-00-100-805-A - CLEANING OF APU COMPARTMENT WITHOUT THE APU INSTALLED, PERFORMANCE OF AMM 49-16-00-100-005-A - CLEANING OF THE APU AIR INTAKE (131-9(A)), INSTALLATION OF A SERVICEABLE APU REF AMM 49-11-11-400-004, PERFORMANCE OF AMM 36-12-00-615-802-A02 - DECONTAMINATION OF THE BLEED-AIR DUCTING SYSTEM DISCONNECTED AT THE APU LOAD-COMPRESSOR VALVE WITH THE ENGINE-2 BLEED PRESSURE, AND THE GROUND SUPPORT EQUIPMENT (GSE) TCT INSTALLED AND APU-DUMMY CHECK-VALVE , ACCOMPLISHMENT OF TASK CARD 21-000-003. NO ODORS DETECTED. APU MEL CLEARED ON LP 1662072.