What was found
CABIN PERSONNEL REPORTED OILY ODOR IN THE CABIN. MX DEPARTMENT PERSONNEL PERFORMED BURN OFF OF HIGH PRESSURE PNEUMATIC DUCTING IAW AMM 21-20-02 AND FOUND LT PACK PRODUCING OILY ODOR. LT AIR CONDITIONING PACK WAS DEFERRED. UPON FURTHER INSP OF THE LT PACK THE RT AND LT COALESCER BAGS WHERE FOUND TO BE WORN. THE LT AND RT BAGS WHERE REPLACED, THE DEFERRAL WAS CLEARED AND THE ACFT WAS RETURNED TO SERVICE.