What was found
STRONG SMELL SIMILAR TO JET EXHAUST AND BURNING PLASTIC NOTICED DURING CLIMB OUT. DISSIPATED UNTIL GONE COMPLETELY BY CRUISE. RETURNED DURING DESCENT AND TAXI IN. ALL CREW MEMBERS AND SEVERAL PASSENGERS NOTICED SMELL AND EXPRESSED CONCERN. PER MCC REQUEST - UTILIZED WORKCARD 0550-2002 - CLASSIFICATION TYPE 9 - OPERATED BOTH ENGINES AT HIGH POWER INDIVIDUALLY ISOLATING EACH PACK. FOUND NO EVIDENCE OF ODOR IN CABIN OR COCKPIT. REPLACED RECIRC FILTERS PER A320 AMM 21-21-41-000-001-A , RAN PACKS. NO SMELL NOTED. A/C OK FOR SVC. (LP# 9277638)