What was found
(CAN) THE ACFT DISPLAYED FMS 1 FAIL, FMS 2, FMS 3, FAIL CAS MESSAGES AND RED FMS FLAGS ON THE ASSOCIATED PRIMARY FLIGHT DISPLAYS AND MAPS. FMS MESSAGES POSTED: FMS NAV INVALID AND CROSS-TALK. AUTOPILOT REVERTED TO BASIC MODES AND AUTOTHROTTLE DISCONNECTED. WHEN THE ISSUE HAPPENED, WE HAD JUST PAST ETP2. ISSUE INVESTIGATED AND MFG RELEASED ADVISORY WIRE AW700-34-0466 TO THE FLEET DESCRIBING THE CONDITION WITH ASSOCIATED WORK AROUND PROCEDURE. THE CONDITION WILL BE CORRECTED IN THE UPCOMING V5 SOFTWARE UPDATE.