What was found
AIR QUALITY EVENT DECENDING THROUGH FL250. LEAN ELIMINATION FUMES PROCEDURE AND ISOLATED PACK 1. FUMES DISSIPATED. ( 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 A DECONTAMINATION OF THE ECS (ENVIORMENTAL CONTROL SYSTEM) IAW AMM 21-00-00-615-802-A. OPS CHECK GOOD A/C BACK TO NORMAL CONFIG. THIS CLEARS MDDR (87104) MOC NOTIFIED PLACARD REMOVED. A/C OK FOR RETURN TO SERVICE