What was found
LEFT ENGINE ELC LIMITER AT START OF TAKE OFF ROLL. LEFT ENGINE LIMITER INOP, CREW COMPLIED WITH MEL PROCEDURES. REJECTED TAKE OFF WAS LESS THAN 50 KNOTS, LOW ENERGY WITH NO HOT BRAKES. DEFERRED DIRECTLY BY TOMC PERFORMING ENGINE RUN ENG EEC MSG WAS OBSERVED ON ENG/APU FURTHER TROUBLESHOOTING REQUIRED. REF. 73-21-07. PARTS USED: PERFORMANCE PAGE, UNIT HAD NO POWER WHILE ENGINE WAS RUNNING. 19-7321-9-0013,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1764207 SN OFF 8864 REMOVED AND REPLACED LH ENGINE, ENGINE SUPERVISORY CONTROL UNIT. BITE CHECKED BOX BEFORE ENGINE RUN WITH NO FAULTS. WHILE CONTROL, ENGINE OFF 19-7321-9-0013 8864 ON 19-7321-9-0014 0335 ACCOMPLISHED ENG RUN ON #1 REF AMM 71-00-00-501. NO FAULTS NOTED.