As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NO WATER PRESS ON ENTIRE ACFT BUT WATER IS FULL. FOUND OVERFLOW DRAIN VLV IN THE OPEN POSITION AT FWD WATER DRAIN PANEL. NEEDS VLV REPLACEMENT, REPLACED OVERFLOW VLV IAW AMM 38-14-44, LEAK CHECKED & OPERATIONS CHECKED NORMAL. WATER PRESS OK.