What was found
BTB- DURING START OF ENGINE 2 ENG 1 FADEC SYS FAULT ILLUMINATED FOLLOWED ECAM. SHUT ENGINE DOWN AND RETURNED TO GATE // REMOVED AND REPLACED ENG 1 EEC PER AMM 73-21-34-400-804-A PERFORMED ENGINE IDLE RUN AND FADEC SYS FAULT ILLUMINATED ON EEC CHAN B (FMU) (E1-4071KS) SOV POS. 28/JAN/2022 761261. NEED TO ACCOMPLISH LAND TEST AND CONTINUE TROUBLESHOOTING. ACCOMPLISHED TSM 73-21-72-810-921-A. NO FAULTS NOTED. WIRING CHECKS CONTINUITY CHECK OK. NO SHORTS TO GROUND. RESISTANCE CHECK OK ALL WITHIN LIMITS 502110 6/28/22. REMOVED AND REPLACED #1 ENG FMU PER AMM 73-21-52. OPS AND LEAK TEST OK. NOFAULTS NOTED ON ENG RUN. CONTROL, ENGINE OFF 33-7321-9-0004 S/N 90767 ON 33-7321-9-0004 S/N 91774 METER, FUEL; PO OFF 43-7321-9-0012 S/N 11251 ON 43-7321-9-0012 S/N 15114