As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PWS FAIL ANNUNCIATED AFTER TAKEOFF. TURNED OFF WXR AND THEN HEARD & FELT GRINDING CYCLIC NOISE. TURNED OFF WXR, MOMENTARILY WXR FAIL ANNUNCIATED. GROUNDED - YES. DIVERSION TIME 35 MINUTES - REMOVED AND REPLACED WXR ANTENNA DRIVE UNIT, WXR OPS TEST OK REF B737-800 AMM 34-43-11. ETOPS GROUND VERIFICATION SUCCESSFUL.