As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRST OFFICER`S EHSI FLICKERED AND ATTEMPTED TO DISPLAY TERRAIN AND WEATHER MODE AT THE SAME TIME WHEN WX/TER WAS PRESSED, EVEN IF THE MODE IS RELEASE. PERFORMED A FIRST OFFIER`S EHSI FILTER FOR COOLING CHECK AND EQUIPMENT COOLING CHECK IAW AMM 21-58-00, NO DEFECTS NOTED. REMOVED AND REPLACED THE WEATHER RADAR CONTROL PANEL IAW AMM 34-43-02 SYSTEM OPS TEST OK.