As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH 12,000 FT, FLIGHT ATTENDANT 1 REPORTS AN UNUSUAL NOISE EMANATING FROM GALLEY AREA. COULD HEAR IT OVER THE INTERCOM BUT DIDN’T HEAR ANYTHING BEFORE THE CALL. THE NOISE CAUSED THE FLIGHT ATTENDANT TO STATE THAT HE FELT UNSAFE. NOISE STOPPED ABOUT 5 MIN LATER. RETURNED AS A PRECAUTION. CLEANED GALLEY DRAIN VLV OF COFFEE GRAINS IAW CMM 25-32-97.