What was found
AIR QUALITY EVENT DURING DESCENT OIL SMELL DURING 11000FT, PACU 1 OFF SMELL WENT AWAY ( PACKS A321 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 )-PERFORMED PACK BURN OUT OF LEVEL C DECONT. OF ECS IAW AMM 21-00-00. NO DEFECTS NOTED. OPS TEST & LEAK CHECKS GOOD. ALSO PERFORMED GVI OF APU AND ENGINE BLEED DUCTS. NO DEFECTS NOTED. PERFORMED ENGINE RUN UP. NO SMELL NOTED. THESE ACTIONS CLEARS DMI # 2748167-2. MOC NOTIFIED. PLACARD REMOVED.