What was found
EN ROUTE, FLT MANAGEMENT GUIDANCE COMPUTER NR 1 FAILED AND FMGC NR 2 FAULTED, FIRST OFFICER LOST MAP DISPLAY 3 TIMES, DIVERTED TO CMH & LANDED WITHOUT FURTHER DIFFICULTY. MX R & R FMGC NR 1 IAW T/C R2A22302, PERFORMED OPS TEST OF FMGC NR 1 & 2, BOTH CHECK GOOD. FUNCTIONAL TEST OF FMGC CONFIRMED REASON FOR REMOVAL, UNIT FAILED FREQUENCY MODULATION (FM) TESTS ON AUTOMATIC TEST EQUIPMENT. R & R A51 PROCESSOR CIRCUIT BOARD (PCB) (P/N E12843AC02) FOR (FM) TEST FAILURE, A52 PCB & A53 PCB FOR FM DBP & FM MP BITE DATA FAILURES, & FG EEPROMS FOR ARINC FAILURE. UNIT REPAIRED AND TESTED IAW CMM.