auxiliary fuel pump

auxiliary fuel pump

An electrical-driven pump that supplies fuel to the engine either while starting or in the case of failure of an engine-driven pump.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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My initial spoken reaction can't be printed here, but I ran through the emergency procedures: mixture full rich, prop to high rpm, full throttle, auxiliary fuel pump on.
Inside, the only difference that shows immediately is that the high side of the auxiliary fuel pump switch is no longer spring-loaded to off.
This activates the auxiliary fuel pump and transfers fuel from the external fuel supply to the generator fuel tank.
* What is the procedure to follow concerning the use of the auxiliary fuel pump? Is it to be on for takeoff, landing or only in an emergency?
If you're not using the auxiliary fuel pump on your 100-kW generator, make sure the auxiliary fuel switch on the electronic modular control panel is switched to OFF.
The electrically powered auxiliary fuel pump on a fuel-injected engine can pull double duty as part of a priming system: Momentarily push a button or flick a switch and the pump primes all cylinders for you.
The pilot reported that, at about 300 feet agl, the engine "quit suddenly with no surging or other warning signs." He selected the auxiliary fuel pump to the high position and switched fuel tanks.
After activating the auxiliary fuel pump, he was able to restart the engine but only partial power was restored.

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