What was found
ABORTED TAKEOFF, FLT 0018, ON TAKEOFF AT PHX EN ROUTE FOR JFK AT 60 KTS NR 1 ENGINE INDICATED 1.390 EPR AND RT ENGINE INDICATED 1.401 EPR, TARGET TOGO WAS 1.401, REJECTED TAKEOFF AT 90 KTS. MAINTENANCE REMOVED AND REPLACED NR 1 ENGINE RELAY BOX (4100KS) IAW AMM 71-51-49-04, OPERATIONAL CHECK WAS GOOD. TEARDOWN/FUNCTIONAL CHECK OF RELAY BOX S/N 1044 PRODUCED NO DISCREPANCIES. UNIT WAS OPENED, INSPECTED, AND TESTED UNDER ALL TEMPERATURE CYCLES PER CMM 71-51-49, REV. 3, NO FAULTS NOTED.