Our APU fuel feed pumps uses 28 V direct current (DC) to drive a high-efficiency DC motor. For brushless DC motor driven pumps, the integral electronic controller uses Hall Effect sensor rotor-position feedback. The electronic controller does not use any software or programmable logic devices. For cartridgecanister style pumps, the canister is installed on the wet side of the tank with the pump cartridge installed into the canister from the dry side. This allows the element that contains the motor and bearings to be replaced without draining the fuel tank.