What was found
PHX - ABORTED TAKEOFF - FLT 0820 - ON TAKEOFF AT PHX EN ROUTE FOR BOS THE NR 1 ENGINE FAILED TO ACCELERATE, REJECTED TAKEOFF AT 60 KTS. TAXIED CLEAR OF RUNWAY AND RAN UP NR 1 ENGINE, ENGINE AGAIN FAILED TO ACCELERATE ABOVE 1.1 EPR, RETURNED TO GATE. MAINTENANCE REMOVED AND REPLACED NR 1 ENGINE ELECTRONIC ENGINE CONTROL IAW T/C R5M73302, OPERATIONAL CHECK WAS GOOD. FUNCTIONAL TEST OF ELECTRONIC ENGINE CONTROL CONFIRMED FAILURE OF UNIT FOR SENSOR FAILURE. REPLACED P2 SENSOR, P5 SENSOR, PAMB SENSOR, AND PB PORT SCREEN IAW CMM 73-28-02, REV. 0. UNIT TESTED AND RETURNED TO SERVICE IAW HS14743.