What was found
AVIONICS BAY SMOKE RED EICAS ON IMMEDIATELY AFTER TAKEOFF. NO EVIDENCE OF ANY SMOKE OR ELECTRICAL FIRE IN AVIONICS BAY, PERFORMED DETAILED GVI AND NOTED SOME RESIDUAL WATER IN AVIONICS BAY FLOORBOARD. LOOKED FOR SOURCE OF WATER LEAK, UNABLE TO LOCATE SOURCE OF WATER POWERED UP AC AND WATER SYSTEM, MONITORED AVIONICS BAY, NO EVIDENCE OF WATER OR E-FIRE WITH AC POWER ON. IN THE GALLEY NOTED RESIDUAL WATER AROUND THE BOTTOM OF THE SINK AND OPENED UP GALLEY TRASH, NOTED EXTENSIVE AMOUNT OF WATER, LOCATED THE LEAK SOURCE TO BE INSTA HOT WATER VENT VALVE, SUSPECTED WATER LEAKED FROM GALLEY TO AVIONICS BAY WHICH MOST OF THE WATER FOUND CONCERTRATED RIGHT BELOW GALLEY AREA. SPOKE WITH FSR AND HE CONCURS AT THIS TIME. UPDATED MCC, PURGED WATER SYSTEM. NO FURTHER MAINTENACE REQUIRED AT THIS TIME. PERFORMED OPS CHECK OF AVIONICS BAY SMOKE IAW GL-6000 AMM 26-14-01 OPS CHECK SATISFACTORY.