What was found
ON DESCENT INTO CMH, RECEIVED NUMEROUS EICAS CAUTIONS AND ADVISORY MESSAGES, LOST SEVERAL INDICATIONS/COMPONENTS. BEGAN TROUBLESHOOTING SITUATION AND LEARNED THAT WITH MAU 2B AND MAU 3A FAILED, WOULD HAVE NO MULTI-FUNCTION SPOILERS (FLIGHT CONTROL), DECLARED THE EMERGENCY 10 MINUTES FROM CMH. FINALLY SAW TRU 2 HAD FAILED AND RAN THAT QRH PROCEDURE. AFTER RESETTING THE TRU, ALL SYSTEMS/INDICATIONS WERE RESTORED AND REPORTED TO ATC, NO LONGER HAD AN EMERGENCY AND THAT EVERYTHING WAS BACK TO NORMAL. PER MAINTENANCE CONTROL REQUEST, THE TRU 2 WAS REPLACED.