What was found
SEA/DFE - DURING CLIMB-OUT, SEVERE ENGINE VIBRATION AND ROLL BACK OF NR 2 ENGINE INDICATING INSTRUMENTS. THE CREW PERFORMED ENGINE FAILURE CHECK LIST, AND RETURNED BACK TO SEA. THE CREW MADE AN UNEVENTFUL LANDING WITHOUT FURTHER INCIDENT. REMOVED AND REPLACED NR 2 ENGINE ASSEMBLY IAW KITTY HAWK MM WORK CARD BH-719401. LEAKED AND TRIMMED CHECKED ENGINE IAW KITTY HAWK MM WORK CARD BH-719518. ALL SYSTEMS WERE CHECKED NORMAL. AIRCRAFT WAS THEN RETURNED TO SERVICE. (X)