What was found
ABORTED TAKEOFF (ATO) SLIGHTLY UNDER 80 KTS. RT ENGINE MADE TO POWER, HOWEVER, LT ENGINE ONLY MADE IT TO 88% N1. AIRCRAFT RETURNED TO BLOCKS. (BTB). RAN ENGINES AT TAKEOFF POWER WITH EEC'S OFF, ENGINES MADE TAKEOFF POWER IAW 71-00-00, ITEM TRANSFERRED TO DI# 61889 AS PER MEL 73-21-1-1B, MBCB 5/10/25, PLACARD INSTALLED AIRCRAFT REMAINS NO ETOPS. AIRCRAFT RETURNED TO SERVICE.