What was found
A/C HAD PFD 1 MALFUNCTION DURING FLIGHT, ALONG WITH CHIP DETECT AND LOW FUEL TEMPERATURE CAS MESSAGE CAME ON. WE TOLD ATC WE ARE HAVING A MALFUNCTIONING SCREEN AND CHIP DETECT AND WE’D LIKE TO DECLARE AN EMERGENCY FOR IT. ONCE WE LANDED THE SCREEN HAD FIXED IT SELF BUT WE STILL WROTE IT UP AND INFORMED GOC AND MOC.