As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WX FAIL MESSAGE ON NAV DISPLAY DURING APPRIVAL THROUGH 10,000 FT. CYCLED WX ON & OFF AND MESSAGE REAPPEARED. GROUNDED - YES. IAW B737-900 FIM 34-43 TASK 802 WX RADAR TX PROBLEM,STEP 2 VISUAL INSPECTION OF WXR WAVEGUIDE FOUND CONTAMINATION PRESENT ON OUTSIDE. REMOVED AND REPLACED WXR WAVEGUIDE PER B737-900 AMM 34-43-21 PB 40. OPS CHECK GOOD. OKAY FOR SERVICE.