What was found
PACS MAKING A WET SOCK SMELL INBOUND CAPT STATED MUSTY SMELL WAS IN FLT USING ENG BLEEDS, APU WAS OFF, AND HE DID NOT NOTICE ANY ODOR BEFORE DEPARTURE USING APU BLEED, THE INBOUND CABIN CREW IN FRONT AND REAR OF CABIN ALL SAID NO ODORS WERE NOTICED BY THEM OR THE PASSENGERS RAN BOTH PACKS ON GROUND , NO ABNORMAL ODORS WERE NOTED, REF AMM 05-50-00-810-831-A, INBOUND CABIN CREW SAID THEY NOTICED NO ABNORMAL SMELLS OR ODORS AND THERE WERE NO PASSENGER COMPLAINTS OF AIR QUALITY ISSUES