As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RADAR ON DESCENT INDICATED CONTINUOUS FAKE INDICATION OF MEDIUM TO HIGH PRECIPITATION FROM 0 TRIM EVEN IN CLEAR SKIES EITHER WX OR WXT ALL SCALES.(<P>PERFORMED OPS CHECK ON WXR IAW B767 AMM 34-43-00 AND SYSTEM OPERATES AND INDICATES CORRECTLY. FOUND GAIN SETTING WAS AT MAX AS SET BY FLIGHT CREWS.</P>)