As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MULTISCAN RADAR IN AUTO MODE DOES NOT DISPLAY TERRAIN IN THE MAP MODE. PRESSING AND HOLDING GC, GROUND CLUTTER, BUTTON DOES NOT DISPLAY GROUND CLUTTER AS IT SHOULD ON EITHER PILOT DISPLAY. THE TEST MODE DOES NOT DISPLAY WHAT APPEARS TO BE A NORMAL TEST PATTERN. SELECTING MANUAL MODE DOES NOT DISPLAY TERRAIN IN THE MAP MODE. SUSPECT THE AUTO MODE IS PROBLEMATIC. ACFT GROUNDED. REPLACED THE WX RADAR TRANSCEIVER IAW TECH SERVICES REQUEST. REF AMM 34-43-11. ACCOMPLISHED OPS TEST, OPS TEST NORMAL. GROUND VERIFICATION SUCCESSFUL.