DOC AIRBUS | AMM A320FINDICATING - DESCRIPTION AND OPERATION
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL
1. General
The indicating systems are:
** ON A/C NOT FOR ALL The indicating systems are:
- the Fuel Quantity Indicating (FQI) system (which gives separate and total fuel quantity indications)
- the Magnetic Level Indicators (MLIs) (a secondary system used to estimate the fuel quantity when the aircraft is on the ground)
- the Fuel Level Sensing System (FLSS), which gives indications and warnings (when the fuel is at specified levels and temperatures).
2. Component Location
Component Location - Fuel Indicating ** ON A/C NOT FOR ALL
Component Location - Fuel Indicating ** ON A/C NOT FOR ALL
Component Location - Fuel Indicating ** ON A/C NOT FOR ALL
Component Location - Fuel Indicating ** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL Component Location - Fuel Indicating ** ON A/C NOT FOR ALL Component Location - Fuel Indicating ** ON A/C NOT FOR ALL Component Location - Fuel Indicating ** ON A/C NOT FOR ALL Component Location - Fuel Indicating ** ON A/C NOT FOR ALL 3. System Description
A. Quantity Indicating (Ref. 28-42-00)
The Fuel Quantity Indicating (FQI) system measures the total quantity of fuel in the range from unusable to fuel overflow. It gives indications for each of these fuel tanks:
The Fuel Quantity Indicating (FQI) system measures the total quantity of fuel in the range from unusable to fuel overflow. It gives indications for each of these fuel tanks:
- the LH and RH wing tanks
- the center tank.
B. Quantity Indicating (Ref. 28-42-00)
The Fuel Quantity Indicating (FQI) system measures the total quantity of fuel in the range from unusable to fuel overflow. It gives indications for each of these fuel tanks:
The Fuel Quantity Indicating (FQI) system measures the total quantity of fuel in the range from unusable to fuel overflow. It gives indications for each of these fuel tanks:
- the LH and RH wing tanks
- the center tank
- the ACT(s) (when installed).
C. Quantity Indicating (Ref. 28-42-00)
The FQI system has:
The dualcomp is installed near to the lowest point of the LH wing tank. The ultracomps are installed near to the lowest point of the RH wing and center (transfer) tanks. The FQIC regularly monitors the dualcomp and the ultracomps and uses their data to calculate the density of the fuel in the fuel tanks.
When the FQIC has calculated the volume of fuel in the tanks and the fuel density, it can calculate the fuel mass.
The fuel mass is displayed on:
One cadensicon is in each wing tank inner cell and one is in the center tank. They are each near to the tanks lowest point. The FQIC regularly monitors the cadensicons and uses their data to calculate the density of the fuel in the related fuel tank.
When the FQIC has calculated the volume of fuel in the tanks and the fuel density, it can calculate the fuel mass.
The fuel mass is displayed on:
The FQI system has:
- fuel quantity probes
- a Fuel Quantity Indicating Computer (FQIC)
- two ultracomps
- a dualcomp.
The dualcomp is installed near to the lowest point of the LH wing tank. The ultracomps are installed near to the lowest point of the RH wing and center (transfer) tanks. The FQIC regularly monitors the dualcomp and the ultracomps and uses their data to calculate the density of the fuel in the fuel tanks.
When the FQIC has calculated the volume of fuel in the tanks and the fuel density, it can calculate the fuel mass.
The fuel mass is displayed on:
- the System Display (SD) FUEL Page and the Engine/Warning Display (EWD) (Ref. AMM D/O 31-66-00-00) (which together make up the ECAM)
- the fuel quantity preselector and the multi-tank fuel quantity indicator (during a refuel (Ref. AMM D/O 28-25-00-00)).
- fuel quantity probes
- a Fuel Quantity Indicating Computer (FQIC)
- three cadensicons.
One cadensicon is in each wing tank inner cell and one is in the center tank. They are each near to the tanks lowest point. The FQIC regularly monitors the cadensicons and uses their data to calculate the density of the fuel in the related fuel tank.
When the FQIC has calculated the volume of fuel in the tanks and the fuel density, it can calculate the fuel mass.
The fuel mass is displayed on:
- the System Display (SD) FUEL Page and the Engine/Warning Display (EWD) (Ref. AMM D/O 31-66-00-00) (which together make up the ECAM)
- the fuel quantity preselector and the multi-tank fuel quantity indicator (during a refuel (Ref. AMM D/O 28-25-00-00)).
D. Magnetic Level Indicators (Ref. 28-43-00)
The MLIs are a secondary direct-reading system used to calculate the fuel quantity in the LH wing, RH wing and center tanks (when the A/C is on the ground). It is not necessary to have electrical power to use the indicators. Tables (Ref. 12-11-28) are used to combine the MLI indications, the aircraft attitude figure and the fuel relative density, to give the amount of fuel in each tank.
The MLIs are a secondary direct-reading system used to calculate the fuel quantity in the LH wing, RH wing and center tanks (when the A/C is on the ground). It is not necessary to have electrical power to use the indicators. Tables (Ref. 12-11-28) are used to combine the MLI indications, the aircraft attitude figure and the fuel relative density, to give the amount of fuel in each tank.
E. Fuel Level Sensing System (FLSS) (Ref. 28-46-00)
The FLSS has:
The FLSS has:
The FLSS has:
- fuel level sensors
- fuel temperature sensors
- two Fuel Level Sensing Control Units (FLSCUs).
The FLSS has:
- fuel level sensors
- fuel temperature sensors
- three Fuel Level Sensing Control Units (FLSCUs).
F. Fuel Level Sensing System (FLSS) (Ref. 28-46-00)
The fuel level sensors are in the fuel tanks. The FLSCUs continuously monitor the fuel level sensors and use the condition of the signal to find if a sensor is 'wet' or 'dry'.
The FLSCUs use the data from the fuel level sensors to control:
The fuel level sensors are in the fuel tanks. The FLSCUs continuously monitor the fuel level sensors and use the condition of the signal to find if a sensor is 'wet' or 'dry'.
The FLSCUs use the data from the fuel level sensors to control:
- The fuel recirculation system (Ref. AMM D/O 28-16-00-00)
- The refuel system (Ref. AMM D/O 28-25-00-00)
- The main transfer system (Ref. AMM D/O 28-26-00-00).
- the fuel recirculation system (Ref. AMM D/O 28-16-00-00)
- the main fuel pump system (Ref. AMM D/O 28-21-00-00)
- the refuel system (Ref. AMM D/O 28-25-00-00).
4. Power Supply
Indicating - Power Supplies ** ON A/C NOT FOR ALL
Indicating - Power Supplies ** ON A/C NOT FOR ALL
Indicating - Power Supplies ** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL Indicating - Power Supplies ** ON A/C NOT FOR ALL Indicating - Power Supplies ** ON A/C NOT FOR ALL Indicating - Power Supplies ** ON A/C NOT FOR ALL 5. Interfaces
Indicating - Interfaces ** ON A/C NOT FOR ALL
Indicating - Interfaces ** ON A/C NOT FOR ALL
Indicating - Interfaces ** ON A/C NOT FOR ALL
** ON A/C NOT FOR ALL Indicating - Interfaces ** ON A/C NOT FOR ALL Indicating - Interfaces ** ON A/C NOT FOR ALL Indicating - Interfaces ** ON A/C NOT FOR ALL 6. Operation/Control and Indicating
Cockpit Indications ** ON A/C NOT FOR ALL
Cockpit Indications ** ON A/C NOT FOR ALL
Cockpit Indications ** ON A/C NOT FOR ALL
Cockpit Indications ** ON A/C NOT FOR ALL
Cockpit Indications ** ON A/C NOT FOR ALL
Cockpit Indications ** ON A/C NOT FOR ALL
Cockpit Indications ** ON A/C NOT FOR ALL
Cockpit Indications ** ON A/C NOT FOR ALL Cockpit Indications ** ON A/C NOT FOR ALL Cockpit Indications ** ON A/C NOT FOR ALL Cockpit Indications ** ON A/C NOT FOR ALL Cockpit Indications ** ON A/C NOT FOR ALL Cockpit Indications ** ON A/C NOT FOR ALL Cockpit Indications ** ON A/C NOT FOR ALL A. Control and Indicating
(1) Control
The FQIC and the FLSCU automatically control the FQI system and the FLSS. The MLIs are a secondary system used to calculate the fuel in the fuel tanks when the A/C is on the ground.
The FQIC and the FLSCU automatically control the FQI system and the FLSS. The MLIs are a secondary system used to calculate the fuel in the fuel tanks when the A/C is on the ground.
B. Control and Indicating
(1) Indications
The FQI, and the temperature measurement indications are shown on the SD (FUEL page). When specified FQI and FLSS conditions occur, the EWD (Ref. AMM D/O 31-66-00-00) gives a warning message and the Flight Warning Computer (FWC) (Ref. AMM D/O 31-50-00-00) gives an audible warning.
The MLIs have fuel level marks which can be seen when the MLI is extended.
The FQI, and the temperature measurement indications are shown on the SD (FUEL page). When specified FQI and FLSS conditions occur, the EWD (Ref. AMM D/O 31-66-00-00) gives a warning message and the Flight Warning Computer (FWC) (Ref. AMM D/O 31-50-00-00) gives an audible warning.
The MLIs have fuel level marks which can be seen when the MLI is extended.
7. BITE Test
The built-in test equipment (BITE) is installed in the FQI computer. It monitors inputs, outputs and operations to give results from the regular system tests. Fault information for each flight, and up to sixty-four flight legs are kept in the BITE memories.
The menus on the Multipurpose Control and Display Units (MCDUs) (Ref. AMM D/O 28-42-00-00) give access to the test results. The tests also monitor some of the fuel system inputs to the Flight Warning System (FWS). Test modes are not available in flight.
A high level test switch is provided to allow limited BITE testing of the high level sensors only.
The built-in test equipment (BITE) is installed in the FQI computer. It monitors inputs, outputs and operations to give results from the regular system tests. Fault information for each flight, and up to sixty-four flight legs are kept in the BITE memories.
The menus on the Multipurpose Control and Display Units (MCDUs) (Ref. AMM D/O 28-42-00-00) give access to the test results. The tests also monitor some of the fuel system inputs to the Flight Warning System (FWS). Test modes are not available in flight.
A high level test switch is provided to allow limited BITE testing of the high level sensors only.