What was found
FLT#20, LHR-JFK. 'DESCENDING THROUGH 4000 FEET ON APPROACH INFLIGHT CONTACTED THE FLIGHT DECK INFORMING US THAT THE CABIN SMELLED OF VOMIT AND EXCREMENT THE SMELL WAS APPARENT AT BOTH THE FWD/AFT FLIGHT ATTENDANT STATIONS THEY LATER INFORMED ME THAT THE SAME SMELL WAS EVIDENT DURING PRE-FLIGHT BUT DISSIPATED WITH AIR FRESHNER APPLICATION; RAN APU & PACKS NO ODOR NOTED RAN ENG 1 & 2 & PACKS REF AMM 72-00-00 NO ODOR NOTED SMELL WAS BO IN ROW 12, NO LONGER PRESENT BP NOTIFIED FOR CLEANING. COMPLIED WITH INFO NOTICE 2017-T015 SECTION A ISOLATED FAULT TO TYPE 10 PAX HYGIENE PER TSM 05-50-00-810-085-B/ TSM 05-50-810-085-D A/C IS OK FOR SERVICE.'