What was found
DECLARED EMERGENCY, BURNING SMELL REPORTED IN AFT GALLEY, TURNED POWER OFF, SMELL DISSIPATED. PRIOR TO LANDING, THE FRONT LAV WAS LEAKING AROUND THE BASE, ALL WATER VALVES TURNED OFF. DURING DESCENT L/E TRANSIT LIGHT ILLUMINATED, THE MACH TRIM FAIL LIGHT ALSO ILLUMINATED. BURNING SMELL PRESENT IN COCKPIT AT THIS TIME. REMOVED AND REPLACED FSEU, FLIGHT ACC UNIT, AND TOILET PER MM.