What was found
FLT#149, JFK-GND. 'FA'S ADVISE OF ODOR EVENT ON FINAL DESCENT AT 6000 FT CHEMICAL SMELL (STRONG AND LASTED UNTIL GATE ARRIVALIN REAR CABIN ( PACKS ); REF INFO NOTICE 2017-T015J LEVEL A. INSP APU FOR LEAKS, NO DEFECT NOTED. ACCOMPLISHED APU COMPRESSOR WASH PER AMM 49-20-00. ACCOMPLISHED LEVEL A DECONTAMINATION PER TSM TSK 21-00-00-615-802A. NO ODOR WAS NOTICED. BOTH RECIR FILTERS WERE REPLACED PER AMM 21-21-41. THIS CLEARS MDDR 505947. MX-4 UPDATED. PLACARD REMOVED. MCC NOTIFIED.'