What was found
ECAM ON TAKEOFF ROLL AT 80KTS, ENG 1 SYS CTL FAULT. ABORTED T/O, RETURNED TO GATE. REMOVED NR 1 ENG FMU IAW AMM 73-21-52-000-802A. INSTALLED FMU IAW AMM 73-21-52-400-802A. OPS AND LEAK CHECK GOOD. REF LP 6094691 FOR VERIFICATION FLIGHT.