What was found
AT ROTATION, NR 2 ENGINE AND THROTTLE BEGAN TO ROLL BACK. NOTICED FLUX BUT ON PUSHING NR 2 THROTTLE BACK UP, ENGINE RETURNED TO NORMAL. REMOVED AND REPLACED NR 2 ENGINE ECU PER M/M 73-21-01-4. RAN NR 2 ENGINE PER JRH AND M/M 71-00-00-5. POWER ASSURANCE CHECK, ALL PARAMETERS NORMAL.