What was found
TUS - ABORTED TAKEOFF - FLT 0448 - ON TAKEOFF FROM TUS EN ROUTE TO PHX AT APPROXIMATELY 70 KIAS WITH THE NR 1 ENGINE INDICATED NORMAL EPR AT 1.99, NR 2 ENGINE INDICATED LOW EPR AT APPROXIMATELY 1.45. NR 1 ENGINE N1 WAS 94 PERCENT, NR 2 ENGINE N1 APPROXIMATELY 84 PERCENT. ADVANCED NR 2 ENGINE THRUST LEVER SLIGHTLY WITH NO CHANGE IN EPR OR N1. ABORTED TAKEOFF, DID NOT OBSERVE EGT, N2, OR FUEL FLOW ON NR 2 ENGINE PRIOR TO REJECTION. MAINTENANCE ADJUSTED EPR SETTINGS IAW BMM 71-09-236, HG AT 29.4, TEMPERATURE AT 13C, EPR SETTINGS 2.14 ALL PARAMETERS EQUAL. PERFORMED ACCELERATION TEST IAW BMM 71-09-200 EPR WAS REACHED IN 3 SECONDS ON BOTH ENGINES. EGT, N1, N2 , AND FUEL FLOW ALL OPERATED NORMALLY.