What was found
FUME EVET AT FL 380 SUSPECTED ON PAACK 1. ISOLATED AND FUMES DISPERSED, UPON DESCENT PACK #1 WAS TESTED AGAIN AND FUMES RETURNED. ISOLATED AGAIN WITH NO FURTHER FUMES. ( 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 )-PERFORMED THE REMOVAL OF THE CONAMINATION FROM THE ECS IAW AMM 21-00-00. R&R BOTH P1&P2 FILTERS IAW AMM 21-21-41. R7R ENG #1 SEAL ASSY IAW AMM 72-60-31.. RAN BOTH ENG BLEED, ALSO ISOLATED PACKS. NO SIGN OF CONTAMINATION. NO SIGN OF POSSIBLE CAUSE. THIS CLEARS DMI 2906237-1 REMOVED PLACARD. MOC NOTIFIED