What was found
FLT#8351, BOS-MCO. 'MODERATE OILY ODOR IN FLIGHT DECK. WHEN APU BLEEDS ON AND DURING DESCENT AFTER 18,000 FEET NAUSEATING.' PER 320 TSM 05-50-00-810-831-A FOUND APU TO BE A SOURCE OF ODOR. C/W 320 MM 21-00-00-615-803-B AND 36-10-00-615-801-A FOR DECONTAMINATION OF ECS SYS AND BLEED DUCTS. REMOVED AND REPLACED L/H AND R/H RECIRC FILTER REF 320 AMM 21-21-41. REMOVED AND REPLACED L/H AND R/H OZONE FILTERS REF 320 AMM 21-51-41. REF LG PG 3565374, ITEM 1 (ACCOMPLISHED REQ LEAK CHECK OF LH & RH OZONE FILTERS IAW AMM 21-51-41 OK FOR SERVICE ) FOR LEAK CHECK. ' (SUPPLEMENTAL ADDED TO DESCRIPTION)