What was found
CREW REPORTED MUSKY SMELL AROUND FLIGHT DECK AND FWD LAV UPON ARRIVAL AFTER APU START. SEE PIC FOR PAC CONFIGURATION STARTED APU, APU OPERATING NORMALLY, TURNED ON BOTH PACKS, CHECKED FWD LAV, CHECKED FWD E/E COMPARTMENT. NO APU STATUS MESSAGES, NO DISCREPTENCY FOUND, COULD NOT REPLICATE MUSKY SMELL. OK FOR SERVICE.