As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WX RADAR BEGAN MAKING RUMBLING/GRINDING NOISE FOLLOWED BY LOUD VIBRATION UNDER FEET. WX/FAIL ALERT ON NAV DISPLAY FOLLOWED. CONFIRMED SOUND AND VIBRATION WHEN CYCLING WX RADAR. GROUNDED - YES. REMOVED & REPLACED WXR DRIVE UNIT B737-800 AMM 34-43-11.