What was found
DURING A ROUTINE A-CHECK, THE RIGHT ENGINE INBOARD LINE TO OIL COOLER WAS FOUND CHAFED. REMOVED AND REPLACED OIL COOLER LINE IAW MAINTENANCE MANUAL. LEAK CHECKED GOOD. CLAMPED OFF SOURCE OF CHAFING. AIRCRAFT RETURNED TO SERVICE. ACT: 13,545. ACTC: 15,285. (X)