What was found
AUTO TILT FUNCTION ON WEATHER RADAR ISN'T FUNCTIONING PROPERLY. WHEN AUTO IS UTILIZED THE RETURN DISPLAY SHOWS VERY INTENSE RETURNS , WHEN NO WEATHER IS ACTUALLY THERE, IT MAYBE POINTING AT THE GROUND, RADAR SYSTEM FUNCTIONS CORRECTLY WHEN UTILIZING MANUAL TILT. ACFT GROUNDED. ACCOMPLISHED FIM 34-43, TASK 814. ACCOMPLISHED WXR SYSTEM OPERATIONAL TEST REF B737-900 AMM 34-43-00-710-802-001. OPS CK GOOD WITH NO ABNORMAL READINGS. ACCOMPLISHED WXR SYSTEM BITE REF FIM 34-43 TASK 801. OPS CK GOOD. THIS CLEARS MEL 34-15H. NO CONFIG CHANGE. GROUND VERIFICATION SUCCESSFUL.