What was found
REJECTED TAKEOFF, NR 1 ENGINE UNABLE TO REACH TAKEOFF POWER, CHARTED 1.58 COULD ONLY ACHIEVE 1.47 ALL OTHER PARAMETERS NORMAL, EXCEPT FOR N1 NR 1 ENGINE 94 PERCENT NR 4 ENGINE 99 PERCENT. REMOVED AND REPLACED NR 1 ENGINE FUEL FILTER, NO DEFECTS NOTED PER M/M 73-11-01, PERFORMED FUEL PUMP HYDRAULIC STAGE (FD12) 800 PSI WITHIN LIMITS, PERFORMED POWER CONFIDENCE RUN PER M/M 71-00-01 ACCEPTED BY POLAR AIR CARGO ENGINEERING. FULL POWER TAKEOFF COMPLETED AT HNL.