As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR QULITY EVENT, ISOLATED TO PACK 2 ON DECENT ( PACKS - A320 WITH MOD. 30626/MP K6443 (ENHANCED ECS) OR A321 WITH MOD. 157080/MP K17996 (PACK FLOW SELECTOR) AND WITH MOD. 30626/MP K6443 (ENHANCED ECS) )-PERFORMED ECS LVL B DECONTAMINATION PER AMM 21-00-00.NO CONTAMINATED SMELL NOTED. DMI 3550222-1 CLRD.LOG UPDATED PLCD RMVD MOC NOTIFIED.