As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TILT ON WEATHER RADAR WHEN IN AUTO NOT WORKING CORRECTLY. ON CLIMB OUT IN AUTO MODE TILT WAS -1 DEGREES TO -2 DEGREES DOWN ALL THE WAY TO CRUISE. TRIED IN BOTH WX WXT MODES ON CAPT AND F/O SIDES. WORKS OK IN MANUAL MODE. ACFT GROUNDED. REPLACED WEATHER RADAR ANT DRIVE UNIT IAW AMM TASK 34-43-11-400-802/34-43-11-000-802. OPS CKS GOOD.