What was found
THE LT & RT PRIMARY FLIGHT DISPLAYS FLASHED NUMEROUS TIMES THEN BOTH FAILED. THE LT & RT NAVIGATIONAL DISPLAYS FLASHED & FAILED INTERMITTENTLY. REPLACED THE CTR & RT DATA CONCENTRATOR UNITS. THE CAUSE OF THE DISPLAY UNITS FLASHING & FAILING WAS INCOMPATIBLE SOFTWARE AMONG THE FOUR DISPLAY ASSEMBLIES & THE THREE DATA CONCENTRATOR UNITS. THIS AIRPLANE IS EQUIPPED WITH A FLAT PANEL DISPLAY SYS THAT WAS INSTALLED IAW STC ST02165NY.