What was found
NR 2 ENGINE THRUST LIMITED ON TAKEOFF 84 PERCENT, TAKEOFF N-1 DESIRED WAS 90.2 ABORTED AT 72 KNOTS, MANUAL OVERIDE OF THE THROTTLE ONLY RESULTED IN A 2 PERCENT INCREASE IN N1. ACFT GROUNDED. ACCOMPLISHED FIM TASK 73-05, TASK 808, PARA E,3, 4, 5. NO DEFECTS. R & R EEC IAW TASK 73-21-10-400-801. PERFORMED ENGINE RUN + NO CHANGE IN ENGINE PERFORMANCE (NO HELP). R & R FUEL FILTER IAW AMM 73-11-02-400-801. DISCONTINUED MAIN FUEL SUPPLY LINE, NO BLOCKAGE REINSTALLED MAIN FUEL LINE REF PPBM 71-00-02, FIG 12-1 SHEET. REMOVED FUEL PUMP PACKAGE, INSTALLED NEW FUEL PUMP & HMU AS A PACKAGE MM 73-11-01-400 & TASK CARD N8473001, HMU INSTALL. LEAK & OPS CHECK GOOD. PERFORMED POWER ASSURANCE TEST 5, ALL PERAMETERS NORMAL.