What was found
NUMBER 1 ENG N1 FLUCTUATES 1-3% DURING AND AFTER POWER CHANGES. EGT/N2/FF FLUCTUATE W/N1. DURING THIS STATE NR 1 FF AVE .15-.20 / NR 2 ENG FF & EGT APPROX 20-40 DEGREES < NR 2 ENG EGT. FLUCTUATIONS OCCURRED W/ AND W/O AT ENGAGED. ONCE ENG STABILIZED AT CRUISE NR 1 ENG INDICATIONS MATCHED NR 2 ENG. WITH AND WITHOUT AT'S ENGAGED. REMOVED AND REPLACED NR 1 ENG EEC REF AMM 73-21-60 OPS TEST NORMAL. EXAMINED PS3 PRESSURE LINE NO ABNORMALITIES NOTED. R & R NR 88332 POS NR 1 PN OFF ON 2042M67P02 SN OFF LMDR4387 SN ON FFFH0451.