What was found
OIL ODOR IN CABIN. ON TROUBLE SHOOTING FOUND ODOR COMING FROM RT PACK WITH NR 2 ENGINE BLEED ON. SUSPECTED SKYDROL SMELL IN CABIN AFTER FINDING LEFT HYDRAULIC SYSTEM OVER SERVICED., NO OIL FOUND IN DUCTS. AFTER FURTHER TROUBLE SHOOTING, CONFIRMED NR 2 ENGINE HAD SMALL AMOUNT OF OIL SEEPAGE FROM NR 3 BEARING COMPARTMENT. ENGINE REMOVED AND ROUTED TO ENGINE SHOP FOR REPAIR. RAN ENGINES AT POWER. ACCOMPLISHED A/C PACK BURNOUT, NO ODOR NOTED AFTER PACK BURNOUT, REPLACED BOTH RECIRCULATION FILTERS.