As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED HEARING A SUDDEN LOUD LOW PITCH NOISE THAT BEGAN TO GROW LOUDER. FLIGHT ATTENDANT REPORTED NOISE COMING FROM GALLEY DOOR. INSPECTED GALLEY SERVICE DOOR & NO DEFECTS NOTED. MX OPS CHECKED ALL HYD SYS, OPS CHECK NORMAL. MX FOUND DEBRIS IN GALLEY DRAIN. CLEARED DEBRIS FROM GALLEY DRAIN.