As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRIOR TO TOP OF DESCENT WX RADAR FAILED WITH WX FAIL AND PWS FAIL. CYCLED POWER OFF AND ON. RADAR WOULD COME BACK ON BRIEFLY AND FAIL AGAIN. GROUNDED - YES. PERFORMED WEATHER RADAR OPS TEST. OPS TEST PASS. REF B737-9 AMM 34-41-00-710-801. PERFORMED GROUND PROXIMITY WARNING SYSTEM OPS TEST. OPS TEST PASS. REF AMM 34-49-00-710-801.