What was found
FLT#2985, LAX-MIA. (AIRCRAFT PERFORMED AN AIR TURN BACK TO LAX) 'DURING THE CLIMB PHASE AND CONTINUING AT CRUISE AND DESCENT A PERSISTENCE ODOR WAS PRESENT THROUGHOUT THE ENTIRE AIRCRAFT INITIAL SMELL WAS DIRTY SOCKS BUT BECAME AN OILY SMELL IN THE LATTER STAGES OF THE FLIGHT; PERF INFO NOTICE 2017-T015J ODOR TYPE 10 LVL3 LVLC SOURCE OF ODOR IDENTIFY TO A PAX BAG CARRYING CHEESE IN FWD CARGO BIN SPILL REF AMM 51-28-00-615-802. REMOVED SIDEWALLS PANELS. CLEANED & DRIED. REPLACED REC FILTERS AS PER 21-21-41 PERFORMED ECS DECOMP LVL C PACK BURN PER AMM 21-00-00-615. A/C OK FOR SERVICE.