As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WX RADAR HAD INTERFERENCE VAR FROM 010 DEG TO 350 DEG RELATIVE TO THE NOSE OF A/C. STREAKS FROM CNTR TO OUTER EDGE OF DISPLAY. CONFIRMED SPOKING ON WX DISPLAYS. REPLACED WX R/T REF MM 34 43 41 000 801 & 34 43 41 400 801. ETOPS GROUND VERIFICATION SUCCESSFUL REF MM 34 43 00 710 802 001.