What was found
(CAN) DURING THE C-08 CHECK, IT WAS DISCOVERED DURING THE OPERATIONAL TEST, THAT THE POTABLE WATER HEATERS, IN LAVATORY F, WERE MAKING THE C/B TRIP. THE 3 UNITS WERE REMOVED AND SENT TO THE AVIONICS SHOP. WHEN REMOVING THE TOP COVER OF ONE UNIT, WE FOUND A SOPPY SUBSTANCE AND THE 2 OTHER UNITS SHOULD NOTHING (NO DEPOSITS). WHEN THE BOTTOM COVERS WERE REMOVED, WE FOUND ALL 3 THERMOSTAT ASSEMBLIES (P/N 24D50703G03) AND IRCUIT BOARD (24D507078G03) ASSEMBLIES BURNED. P/N OF THE POTABLE WATER HEATER ASSEMBLIES: P/N 24E507009G01. S/N'S OF THE POTABLE WATER HEATER ASSEMBLIES; S/N GOS 02204, G6W 03813, GOS 03427