As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 36000 FT TURNED ON WEATHER RADAR AND FELT VIBRATION AT FEET AND COULD HEAR A LOW PITCH HUM. F/A SITTING IN JUMPSEAT ALSO FELT AND HEARD VIBRATION. ACFT GROUNDED. REMOVED AND REPLACED WEATHER RADAR R/T IAW AMM 34-43-11, AND REMOVED AND REPLACED ANTENNA PEDESTAL DRIVE, SWAPPED ORIGINAL ANTENNA PLATE TO NEW PEDESTAL IAW AMM 34-43-11. OPS AND GROUND VERIFICATION OK IAW FIM 34-43, TASK 802. AIRCRAFT OK FOR SERVICE.