As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FOLLOWING THE ADVISORY WIRE FROM MFG, THE WATER SYSTEM VENT VALVES (6) WHERE REPLACED IN MFG. ON THE NEXT CUSTOMER FLIGHT, ONE VENT VALVE FROM THE GALLEY HAS STARTED TO LEAK. END RESULT, AVIONICS BAY FLOODED, BLACK BOXES FULL OF WATER. INVESTIGATION SHOWED THAT THE 2 VALVES ARE ACTING REVERSE. AS A TEMPORARY MEASURE, MFG DRAWING NR BAS67038670 INCORPORATED. (REMOVED VENT VALVES AND INSTALLED PLUGS) (TC NR 20070418001)