As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WX RADAR TEST SWITCH LATCHES IN TEST POSITION BUT DOES NOT TEST, CONSISTENTLY. IT WILL EVENTUALLY GO INTO TEST MODE OR WILL NOT TEST. ALSO SAW PWS FAIL CAUTION ONCE. GROUNDED - YES. REMOVED AND REPLACED WEATHER RADAR CONTROL PANEL. OPS TEST GOOD, NO FAULTS. REF AMM 34-43-91.