Systems Guide

Aerosoft

Airbus A320/A321

SYSTEMS

Systems guide

Vol

04-03-48

28 October 2014

CENTRE FUEL TANK TRANSFER

The Fuel Level Sensing Control Unit (FLSCU) controls the transfer of fuel from the centre tank to the wing tanks.

When 500 KG of fuel has been used (from a wing tank) the FLSCU will start the transfer of fuel from the centre

tank to the wing tank. When the FLSCU senses the wing tank is full the transfer is stopped. This system ensures

that the wing tanks are always as full as possible and that the wing tanks fuel levels are always as equal as

possible.

NOTE: to avoid an incorrect fuel load, always fill the wing tanks complete before adding

fuel to the center tank. If you see the MODE SEL button light up with a amber FAULT the

most obvious cause is that the center contains too much fuel and the wing tanks too little.

OVERHEAD PANEL

TK PUMPS (push button switch), pump the fuel from the wing tanks to the engines.

 ON Pump is energized

 OFF Pump is deactivated

 FAULT When the delivery pressure drops FAULT will be lit in amber, suppressed when OFF setting is

selected

CTR TK XFR (push button switch), pump the fuel from the center tank to the wing tanks

 ON XFR valve is open when MODE selector is in MANual mode

 OFF XFR valve is closed

 FAULT Lit in amber in case of wing tank overflow

MODE SEL (push button switch),

 AUTO Center tank XFR is automatic, open when wing tanks are not full, closed when centre tank is

empty

 MAN Center tank XFR is manually controlled with CTR TK XFRpush button switches

 FAULT Lit in amber when: