As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK TO STATION DUE TO LT & RT RADAR SYS INOPERATIVE. NO RETURNS ON EITHER NAV DISPLAY WITH TILT FULL DOWN & FULL GAIN IN MAX. CLEANED & DRAINED HOLES AT WAVE GUIDE AFT OF PRESS BULKHEAD. LT & RT RADAR SYS OPERATIONAL CHECKED SATISFACTORY IAW AMM 34-43-00.