As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOUD VIBRATION IN AFT GALLEY. COULD BE WATER PUMP. STARTED WHEN SYS PRESSURE CAME UP. FOUND A LOT OF AIR IN AFT GALLEY SYSTEM. REMOVED BOTH COFFEEMAKERS AND ALL FAUCETS IN AFT GALLEY AND LAVS, NOISE WENT OFF AFTER ABOUT 4-4 SECONDS. INSTALLED BOTH COFFEEMAKERS. NOISE WAS STILL OFF.