As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB PASSING 17000FT, FA CALLED TO REPORT A LOUD RUSHING AIR SOUND COMING FROM AFT GALLEY SINK. PERFORMED AN EMERGENCY LANDING WITHOUT FURTHER PROBLEMS. INSPECTED AND FOUND AUTO DRAIN VALVE STICKING. CYCLED THE AUTO DRAIN VALVE IAW AMM 38-31-04. OPS CHECKED GOOD, AIRCRAFT OK FOR SERVICE.