What was found
FUME EVENT PASSING THROUGH 4000 FT ON DESCENT AT IDLE. FUMES ISOLATED TO PACK 1 ( PACKS A320 WITH MOD 31283/MP P7125 (FWC H2-F1 STND) AND WITH MOD. 30626/MP K6443 (ENHANCED ECS) - FAULT CAUTIONS ASSOCIATED WITH OPERATIVE SIDE NOT DISPLAYED )-ACCOMPLISHED DECONTAMINATION OF THE ECS IAW AMM 21-00-00. R/R BOTH RECIRCULATION FILTERS IAW AMM 21-21-45. OPS CHECK GOOD. NO OTHER DEFECTS NOTED. THIS CLERS DMI # 256315201 MOC NOTIFIED