As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WEATHER RADAR AUTO MODE SHOWS RED & YELLOW CELLS WHEN THERE WERE NONE, 80 MILE RANGE MANUAL MODE OPERATES NORMALLY. ACFT GROUNDED. TESTED THE WEATHER RADAR IAW AMM 34-43-00-710-802-001, OPS CHECKED GOOD, NO HISTORY FOR PREVIOUS 100 DAYS, OK FOR CONTINUED SERVICE.