What was found
FLASH OF LIGHT SMOKE AND ACRID SMELL FROM FOWARD LAV AT CRUISE PERFORMED VISUAL INSPECTION OF LAVATORY ( A ) WIRING AND CREW. REMOVED AND REPLACED FIRST CLASS LAVATORY ( A ) WATER COMPARTMENTS FOR BURNING & ARCING, NONE FOUND. TROUBLESHOT HEATER, REF AMM 38-13-01. WATER HEATER LEAK AND FUNCTIONAL AND FOUND FIRST CLASS LAVATORY ( A ) WATER HEATER FAILED WITH CHECK GOOD. LAVATORY ( A ) OK FOR SERVICE. IPC 38-13-01-01 NOTICEABLE ELECTRICAL SMELL. FORM 44-6020 COMPLETED BY FLIGHT PARTS USED: 1406101,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1406101 SN OFF 2670 IPC REFERENCE # 38-13-01-01 ITEM 63