What was found
DURING CRUISE FLIGHT, CREW EXPERIENCED LH PFD SCREEN FREEZING INTERMITTENTLY. FOLLOWED BY MULTIPLE AVIONICS FAILURES SUCH AS AUTO-PILOT FAIL, AUTO-THROTTLE FAIL, TRANSPONDER FAIL, SPOILER FAIL, GEAR DISAGREE, WINDSHIELD HEAT FAIL, GROUND PROX FAIL, TERRAIN FAIL, GSD 1/2/3 FAIL, ADC 1/2 FAIL, GMA 1/2 FAIL, RUDDER MAINTENANCE CAS. AIRCRAFT LANDED SAFELY. TECHNICIAN FOUND PFD#1 FAILED INTERNALLY PUTTING OUT CORRUPTED DATA DOWN THE DATA BUS CAUSE FAILURE OF DOWNLINE EQUIPMENTS.