As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN AUTO MODE WEATHER RADAR DISPLAY STRONG RETURNS IN CLEAR AIR. AUTO MODE OFF RADAR DISPLAY VERTICAL STREAKS. GROUNDED-YES. UNABLE TO DUPLICATE. DUE TO HISTORY REMOVED & REPLACED WEATHER RADAR RT, REF B737-900 AMM 34-43-41 2. GROUND OPERATIONAL TEST PASS.