As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AIR-TURN-BACK), WX RADAR PAINTS INTERMITTENT FALSE RETURNS ONE SIDE THEN THE OTHER, STABILIZED OR UNSTABILIZED. WHEN UNSTABILIZED, RADAR PAINTS A SINGLE SPOKE AT THE 11 -12 O'CLOCK POSITION. GOING BACK TO STABILIZED, IT PAINTS A DOUBLE SPOKE. VERIFIED OLD RADAR RT PAINTING FALSE IMAGES EVEN ON GND. REMOVED AND REPLACED RADAR RT AND ALL FUNCTIONAL CHECKS GOOD PER M/M 34-41-000-5 PARA 1A-5J. A/C OK FOR SERVICE.