What was found
SPDA FAIL MESSAGE CYAN COLOR CRUISE FL 34, RAN QRH RETURNED TO FIELD, LANDING UNEVENTFUL. REMOVED FROM SERVICE.UPON ARRIVAL, THE FOLLOWING FAULT CODE WERE RETRIEVED "SPDA 2- 24610016SP2. C/W E175 FIM 24-61-00-810-810-A. SUSPECT FAILURE OF SPDA 2 MICRO/COM SLOT 8. R & R SPDA 2 MICRO/COM SLOT 8, IAW E175 AMM 24-61-07-00/400-801-A. "SPDA FAIL" MESSAGE NO LONGER DISPLAYED ON EICAS. NO FURTHER DEFECTS NOTED. RETURNED TO SERVICE.