detected by water level subsystem 64 to provide a third enabling signal 66 to controller 52 finally if brew button 56 is depressed and all other enabling signals are present scr diode 3 phase rectifying bridge 96 is activated to send electrical power to a single heating element 84 thus beginning the heating cycle for the water in boiler 57 the water is heated to a point just below its boiling point taking into account the expected cabin pressures system 50 also includes a warmer pad 86 located in base 67 of the brewer pocket fig3 warming pad 86 is a low power device compared to boiler heater 84 and because of this is typically connected to a single phase of the three phase aircraft power system without the risk of an electrical unbalance in the system consequently warming pad 86 is conveniently controlled by a semiconductor triac which is able to conduct both the positive and negative regions of the ac wave when triggered to the on state upon the detection of a sufficient amount of water in carafe 65 as indicated by level 66 in fig3 warming pad 86 will turn on and provide heat to the coffee collected in carafe 65 warmer pad 86 is employed to maintain a constant temperature once the brewing cycle has started thus maintaining the brewed coffee in carafe 65 at the same constant temperature both during and after the brew cycle is completed system 50 further includes a brew counter maintenance indicator 88 maintenance indicator 88 includes a memory feature so that the user may.