What was found
AFTER TAKEOFF, THE NR 2 ENGINE BECAME ERRATIC, N1 +/- 8%, FF +/- 1000 LBS. WOULD GO ON FOR SEVERAL MINUTES THEN STOP FOR A MINUTE THEN REOCCURE. RECEIVED A NR 2 FADEC FAULT ON THE ECAM ON LANDING. REMOVED AND REPLACED THE N1 SPEED SENSOR IAW AMM 77-11-01-04. REMOVED AND REPLACED N1 RPM INDICATOR IAW AMM 77-11-21-04. REMOVED AND INSTALLED ELECTRONIC CONTROL UNIT IAW AMM 73-21-01-04. PERFORMED ENGINE RUNS IAW JRH, ALL INDICATIONS CHECKED GOOD. ACFT OK FOR SERVICE.