As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FO WX RADAR FAIL DURING TEST. GROUNDED-YES. ACCOMPLISHED A WEATHER RADAR SYSTEM BITE TEST, PER B737-900 FIM 34-43 TASK 801. NO FAULTS NOTED. ACCOMPLISHED A WEATHER RADAR SYSTEM OPERATIONAL TEST, PER B737-900 AMM 34-43-00-710-802. ALL TESTS NORMAL.