As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT NR 3, DU-870 DISPLAY UNIT FLICKERED THEN WENT BLANK SHORTLY AFTER SWITCHING NR 2, DU-870 DISPLAY UNIT INFORMATION TO NR 3 POSITION, BECAUSE NR 2 DISPLAY HAD GONE BLANK BEFORE NR 3. AFTER LANDING, TROUBLESHOT BOTH DISPLAYS, BY INSPECTING WIRE HARNESSES, AND CHECKING FOR POWER AND GROUNDS. NO DEFECTS NOTED OF THE WIRING. BOTH UNITS FAILED INTERNALLY. REPLACED BOTH UNITS WITH REPAIRED AND UPGRADED MOD STATUS UNITS.