What was found
NR 2 ENG SHUTDOWN IN FLT DUE TO FLUCTUATION OF N1, N2, & FUEL FLOW. FLUCTUATIONS INCREASED AS POWER DECREASED. PRIOR TO SHUTDOWN, ENG FLUCTATED 75-95 % N1. A SMALL FLUCTUATION OBSERVED AFTER DEPARTURE. ENG NORMAL TO FL 400. INSPECTED INLET & EXHAUST FOUND NO DAMAGE & CHECKED OK DPI & CHIP DETECTOR. NO FAULTS FOUND. MOTORED ENGINE & NOTED NO UNUSAL NOISES. RAN ENGINE FOR 3-4 MINUTES NO ABNORMAL INDICATIONS. REPLACED N2 TRANSDUCER, RAN ENGINE FOR APPROX 15 MIN. NO FAULTS NOTED. CHANGED N2 TRANSPONDER DUE TO LOST OF SIGNAL. OPS CHECKED GOOD, WORKED IAW MM 77-10-05. C/W BIRD STRIKE INSP ON BOTH ENGINES & AIRFRAME IAW 5-50.