As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CA RADAR DISPLAY APPEARS TO PAINT THE TERRAIN UP TO 160NM IN AUTO MODE. DISH SEEMS TO BE STUCK IN DOWN POSITION IN AUTO) MANUAL WORKS FINE AND FO'S SIDE SEEMS NORMAL IN AUTO MODE. GROUNDED - YES. REMOVED AND INSTALLED NEW WX RT. REF B737-900 AMM 34-43-41/401.