As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER POWER UP, GRINDING NOISE HEARD FROM NOSE CONE AREA. WEATHER RADAR FAIL RT AND PWS FAIL MESSAGES SHOWN ON ND DISPLAY. ACFT GROUNDED. CONFIRMED WEATHER RADAR FAIL RT AND PWS FAIL MESSAGE ON ND. REPLACED WEATHER RADAR ANTENNA FLAT PLATE IAW 34-43-11-000-801/400-801 AND WX RADAR DRIVE UNIT IAW MM 34-43-11-000-802/400-802. WXR SYS OPS TEST NORMAL IAW 34-43-00-710-802-001.