As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE WX RADAR DISPLAY ON THE NDS AND LOWER DU IS SPOTTY THE PICTURE IS NOT SOLID. THERE ARE LOTS OF BLACK HOLES OR GAPS IN THE PICTURE WHEN WE PAINTED THE GROUND THE RETURN WAS NOT SOLID. PERFORMED WEATHER RADAR SYSTEM BITE TEST PER FIM TASK 34 43 00 810 801, GROUND OPS CHECKS GOOD. A/C OK FOR SERVICE.