As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WXR FAIL ON BOTH ND. GROUNDED - YES. DIVERSION TIME 90 MINUTES - PER TSR710872 REMOVED AND PRECAUTIONARILY REPLACED ANTENNA DRIVE UNIT IAW B737-900AMM 34-43-11. PERFORMED OPS CK OF WEATHER ANTENNA DRIVE UNIT IAW AMM 34-43-00-710-802-001. NO DEFECTS NOTED.