As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AQE-SOCK SMELL WITH PACK#1 & APU BLEED AIR ( 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 LEVEL B DECONTAMINATION OF ECS IAW AMM 21-00-00. NO FUMES DETECTED. REPLACED RECIRCULATION FILTERS AS A PRECAUTION. THIS CLEARS DMI 3610194-1. PLACARD REMOVED. FILTERS REPLACED IAW AMM 21-21-41