What was found
ON CLIMBOUT OF OAK THROUGH FL 370 THE NR 2 ENGINE BEGAN TO SURGE FOR A FEW SECONDS. N1 EXCEEDED LIMIT (105.0). AUTO THROTTLES DISENGAGED AND NR 2 THRUST LEVER REDUCED TO NR 2 N1 OF 98.0. THIS BROUGHT ALL INDICATIONS TO NORMAL. FLIGHT CONDITIONS WERE CLEAR AND SMOOTH AIR. REMOVED NR 2 ENG SN 894542 IAW T/C 78471000. ASA TECH 94411. REPLACED NR 2 ENG WITH SN 896771 PN CFM56 7B27/3 PER T/C 78471001 W/O NR 6637. ENG SN THAT WAS REMOVED IS 894542. SYSTEMS PERFORMED SATISFACTORILY VERIFICATION FLIGHT WAS SATISFACTORY.