What was found
AT GATE NR 1 ENG INDICATORS ON ECAM GREEN & NR 2 ENG SHOWED AMBER XX. NR 1 ENG STARTED TO CRANK, IGN MODE SEL NORMAL. BOTH ENG MASTERS OFF. ENG LIGHT OFF, FIRE PB PUSHED TO ABORT, ENG CONTINUED TO CRANK AFTER FIRE PB PUSHED. CYCLED ENG 1 MASTER FROM OFF TO ON BACK TO OFF & CRANKING STOPPED. FAULT LIGHT ILLUMINATED UNDER NR 1 MASTER. UNABLE TO DUPLICATE UNCOMMANDED ENG START IAW TSM TASK 80-00-00-810-854-A. EIU NR 1 HAD PREVIOUS LEG REPORT FAULTING NR 1 ENG MASTER SWITCH. REPLACED NR 1 ENG MASTER SWITCH IAW TSM TASK 80-00-00-10-854-A.