What was found
NR 2 ENGINE HAS REPORTS OF EXCESS OIL ADDED AFTER 15 MINUTE IDLE RUN WHILE AIRCRAFT IS IN ACTIVE STORAGE. PREVIOUS MAINTENANCE ACCOMPLISHED FOR SIMILAR REPORT: ANTI LEAK VALVE REPLACED, LUBE MODULE REPLACED, GEARBOX CHECKED FOR OIL HIDING. GROUNDED - YES. BORO FOUND NO DEFECTS. FOUND OIL COOLER LEAKING, REF B737-800 AMM 79-00-00, 72-00-00. REMOVED AND REPLACED NR 2 ENG AIR/OIL COOLER. LEAK CHECKS GOOD, REF B737-800 MM 24-11-21-000-801, 24-11-21-400-801. PERFORMED LEAK CHECK OF NR 2 ENG DRIVE PAD, REF B737-800 AMM 71-00-00, LEAK CHECK GOOD.