What was found
ON FLIGHT 3924 DURING CRUISE THE CREW REPORTED AT FLIGHT LEVEL 240 THE NR 2 ENGINE SURGED CONTINUOUSLY FOR APPROXIMATELY 2 MINUTES WHILE ALL OTHER INDICATIONS WERE NORMAL. LARGE FLUCTUATIONS N1, N2 & ITT, IGNITION AB DISPLAYED AS IF IT WAS TRYING TO RELIGHT AFTER 2 MINUTES EVERYTHING STABILIZED AND MAINTAINED NORMAL VALUES. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. COMPLIED WITH ROLLS-ROYCE AE3007A FIM TASK 72-00-00-810-804 "THRUST OSCILLATIONS/FLUCTUATIONS" AND REMOVED AND REPLACED ENGINE 2 FUEL PUMP METER UNIT IAW RR MM 73-21-10. THE OPERATIONAL TESTS WERE SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.