What was found
DECLARED EMERGENCY, THE SPDA FAIL EICAS APPEARED IN FLIGHT ON THE ELEC PG THE AC BUSS TIE, APU ICON, AC BUSS 2, TRU, DC BUSS 2. DC US ICON FLASHED FROM GREEN POWERED TO DASHES. COMPLIED W/QRH PROCEDURE. AFTER LDG ENG 1, 2 NO DISPLAY MSG AND CARGO FIRE PROT FAULT APPEARED AFTER LDG. REPLACED SPOA COMMS MODULE SLOT 8 SPDA, NR 2, MM 24-61-07-400-301-A. (K)