What was found
AIRCRAFT RETURNED TO PLATFORM, THE RT ENGINE INGESTED A PLASTIC BAG DURING TAXING. RT ENGINE WAS INSPECTED IAW MM 71-00-00, SECONDARY FLOW AREA WAS CLEANED AND ENGINE WAS STARTED, ALL CORRECT. AIRCRAFT WAS DISPATCHED BUT RETURNED TO PLATFORM AGAIN, SMOKE IN THE CABIN AND PLASTIC ODOR. AIRCRAFT WAS SENT TO THE HANGAR AND DURING OVERNIGHT CHECK AT MEX, RT WATER SEPARATOR WAS REPLACED IAW MM 21-51-05, RECIRCULATION FILTER WAS CLEANED IAW MM 21-25-01 AND OPERATIONAL TEST WAS PERFORMED IAW MM 21-25-00, ALL CORRECT.