As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NO WATER PRESS IN ALL LAVATORY’S & WATER FAUCETS. IAW MX & SYS CONTROL DUMP 150,000 FUEL & AIR RETURNED TO EWR. UPON TROUBLESHOOTING FOUND THE BLEED AIR CHECK VLV JAMMED CLOSED. R & R SAME, ALSO FOUND THE WATER SYS DRAIN HANDLE AT 2L PARTIALLY OPEN, REPOSITIONED SAME. WATER SYS NOW PRESSURIZES NORMALLY WITH NO FAULTS IAW AMM 38-42-09.