As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WX RADAR NOT ACCURATELY DISPLAYING THUNDERSTORM ACTIVITY. INTERMITTENT DISPLAY OF CELLS IN MANUAL AND AUTO. GROUNDED - YES. ACCOMPLISHED B737-9 IFIM TASK 34-41-00. WEATHER RADAR OPERATIONAL TEST PER B737-9 AMM 34-41-00-710-801. OPS CHECKS GOOD. ACFT OK FOR SRVC.