What was found
ON TAKEOFF ROLL, WHEN TOGA WAS SELECTED, ENGINE NR 1 FAILED TO ACCELERATE PAST 1.2 EPR. CREW DISCONTINUED TAKE OFF AT 50 KNOTS. MOC DETERMINED IT WAS AN AUTOTHROTTLES PROBLEM. CREW CONTINUED FLIGHT ON MEL 22-30-01-C AUTOTHROTTLE SYSTEM INOP. ALL ENGINE INDICATIONS WERE NORMAL FOR NON AUTOTHROTTLE TAKEOFF. ALL THRUST SETTINGS MUST BE MANUALLY SET. UNABLE TO DUPLICATE DISCREPANCY ON GROUND, PER TSI REPLACED THRUST RATING PANEL IAW 22-35-12-04 AND NR 1 TCC PER MM 22-36-34-04-01. CARRIED OUT AFS/LAND TEST PER MM 22-40-00-5, BOTH TESTS PASS, NO FAULTS NOTED AT THIS TIME.