What was found
FLT#1039, BOS-AUS. 'DISCOVERED ODOR ON DESCENT 10000FEET, DISSIPATED ON APPROACH. REPORTED BY #3 & #2 FA AFTER FLIGHT NO ODOR UPFRONT. VERIFICATION UPFRONT AFTER COCKPIT DOOR OPEN. ( APU SYSTEM ); PER LOG PAGE 3260345, ITEM 1 (PER TSM 05-50-00-810-831A REPLACED THE OIL COOLER FAN ON LOG PAGE 3260348 AND THE OIL COOLER ON PAGE 3260349. PERFORMED PACK BERN PER INFO NOTICE 2017-T015F SECTION D, RAN PACKS AND NO ODER NOTED, CHECK OK. AND REPLACED RECIRCULATING FILTERS PER 21-21-41.) FUNCTIONAL CHECK APU PER MM 49-00-00-710-010. CHECK OK, CLEARED MEL AND MDDR.' (SUPPLEMENTAL INFORMATION ADDED TO THE DESCRIPTION)