What was found
FLT#819, JFK-ATL. 'BELOW 10,000 CABIN ODOR / FUME DIRTY SOCK SMELL ( APU SYSTEM ); PERFORMED APU CLEANING PROCEDURE AND INSP APU AREA FOR LEAKS. GAINED ACCESS TO APU BLEED AIR DUCT AND BORESCOPE WAS PERFORMED. NO CONTAMINANTS WERE NOTED. OPERATED APU PER AMM 49-00-00. NO ODOR OR FUMES ARE PRESENT. MDDR CLEARED, MX-4 UPDATED, PLACARD REMOVED.'