What was found
OIL QUANTITY (ENGINE) - LOW. NO LEAKS FOUND DRAIN MAST BUT ON A-CK VISUAL EXCESSIVE OIL FOUND INSIDE BELLY OF REVERSER COWLS, WIPED DOWN & DID IDLE RUN 2 TIMES. OIL SEEMS TO BE COMING FROM ANGLE GEAR BOX AREA. OIL PUDDLES BOTTOM OF FAN CASE (RUNS DOWN STRUT-6) -NO OIL FUMES - REMOVED 6-O`CLOCK PANEL AND STRUT FAIRINGS, OIL LEAK IS FWD OF ANGLE GEARBOX. SUSPECT NR 1.5 OR 2 BEARING SEAL. FOUND ENG AIR-OIL COOLER LEAKING FROM COOLER CORE. REPLACED ASSY NR 2 ENG AIR-OIL HEAT EXCHANGER LEAKING FROM MIDDLE FINS. REPLACED EXCHANGER AND VALVE ASSY. INSPECTED ENGINE FOR LEAKS DURING AND IMMEDIATELY AFTER SHUT DOWN, NO LEAKAGE NOTED, VERIFIED ENG AIR-OIL COOLER FIXED HOC.