As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WEATHER RADAR RETURNS DID NOT MATCH OUTSIDE VISUAL CONDITIONS. RADAR CALIBRATION SEEMED CALIBRATED 3 DEGREES TOO HIGH. MINUS 3 DEGREES SEEMED TO EQUAL ZERO DEGREES. ACFT GROUNDED. R & R WX RADAR ANTENNA DRIVE UNIT REF MM 34-43-11-000-802 & 34-43-11-400-802. OPS NORMAL IAW MM 34-43-00-710-802-001. ETOPS GROUND VERIFICATION TEST SUCCESSFUL.