As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VTK DISPLAYED AND LOSS OF ALL INFO ON FOS NAV DISPLAY. RESTORED TO NORMAL IN APPROX 10 SECONDS. ACFT GROUNDED. ACCOMPLISHED DFCS BITE TESTS 10, 20 , 58 & 49. ALL TESTS PASSED. AC REMAINS CATIIIA AUTOLAND QUALIFIED. VERIFIED LWMP PLACARD STATUS SCREW REFLECTS SAME REF AMM 22-00-01-730-801.