W DOC AIRBUS | AMM A320F

Operational Test of the Fuel Quantity Indicating-System

TASK 28-42-00-710-001-A
Operational Test of the Fuel Quantity Indicating-System

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
  • THE FLIGHT CONTROLS
  • THE FLIGHT CONTROL SURFACES
  • THE LANDING GEAR AND THE RELATED DOORS
  • COMPONENTS THAT MOVE.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
ZONE: 210
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
 B. Referenced Information
REFERENCE
DESIGNATION
TASK 24-41-00-861-002-A
Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01
Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02
Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A
De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01
De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-60-00-860-002-A
EIS Stop Procedure
3. Job Set-up
Subtask 28-42-00-861-050-B
A. Aircraft Maintenance Configuration
WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
   (1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
   (2) If you do not have ground power available, on the refuel/defuel panel 800VU, put the BATT POWER switch to the ON position.
NOTE: HOT BUSS 701PP is energized for ten minutes only to prevent discharge of the aircraft batteries, unless you put the MODE SELECT switch to REFUEL.
4. Procedure
Subtask 28-42-00-710-050-A ** ON A/C NOT FOR ALL
A. Operational Test of the Fuel Quantity Indicating-System
   (1) Do the tests that follow:
ACTION
RESULT
1.On refuel/defuel panel 800VU:
On refuel/defuel panel 800VU:
A.Set the switches:
  • REFUEL VALVES to NORM
  • MODE SELECT to OFF
  • TEST to LTS.
  • The CKPT legend comes on
  • The AUTO REFUEL-END legend comes on
  • The FUEL QUANTITY shows 88.88 (for each tank)
  • The PRESELECTED quantity shows 88.8
  • The ACTUAL quantity shows 88.8.
B.Set the TEST switch to the center position.
  • The CKPT legend goes off
  • The AUTO REFUEL-END legend goes off
  • The FUEL QUANTITY changes from 88.8 to an indication of the quantity of fuel in the tanks
  • The ACTUAL quantity changes from 88.8 to an indication of the quantity of fuel in the tanks
  • The PRESELECTED FUEL QUANTITY value changes to the value given before the LTS test.
C.Set and hold the INC/DEC switch to DEC.
  • The PRESELECTED quantity changes to the actual value (or the actual value plus 0.1).
D.Release the INC/DEC switch.

Subtask 28-42-00-710-050-B ** ON A/C NOT FOR ALL
A. Operational Test of the Fuel Quantity Indicating-System
   (1) Do these tests:
ACTION
RESULT
1.On the panel 800VU and 801VU:
On the panel 800VU:
A.Set the switches:
  • REFUEL VALVES to NORM
  • MODE SELECT to OFF
  • TEST to LTS.
  • the CKPT legend comes on
  • the AUTO REFUEL-END legend comes on
  • the FUEL QUANTITY shows 88.88 (for each tank)
  • the PRESELECTED quantity shows 88.8
  • the ACTUAL quantity shows 88.8.
B.Set the TEST switch to the center position.
  • the CKPT legend goes off
  • the AUTO REFUEL-END legend goes off
  • the FUEL QUANTITY changes from 88.8 to an indication of the quantity of fuel in the tanks
  • the ACTUAL quantity changes from 88.8 to an indication of the quantity of fuel in the tanks
  • the PRESELECTED FUEL QUANTITY value changes to the value given before the LTS test.
C.Set and hold the INC/DEC switch to DEC.
  • the PRESELECTED quantity changes to the actual value (or the actual value plus 0.1).
D.Release the INC/DEC switch.

2.On the panel 801VU:

A.Set the FQI Select Switch to CTR+ACT.
On the FUEL QTY panel 6QT:
  • the CTR shows the quantity of fuel in the CTR tank + the ACT.
B.Set the FQI Select Switch to CTR.
On the FUEL QTY panel 6QT:
  • the CTR shows the quantity of fuel in the CTR tank.
3.Set the FQI Select Switch to ACT.
On the FUEL QTY panel 6QT:
  • the CTR shows the quantity of fuel in the ACT.
Subtask 28-42-00-710-050-J ** ON A/C NOT FOR ALL
A. Operational Test of the Fuel Quantity Indicating-System
   (1) Do these tests:
ACTION
RESULT
1.On panel 800VU and 801VU:
On panel 800VU:
A.Set the switches:
  • REFUEL VALVES to NORM
  • MODE SELECT to OFF
  • TEST to LTS.
  • The CKPT legend comes on
  • The AUTO REFUEL-END legend comes on
  • The FUEL QUANTITY shows 88.88 (for each tank)
  • The PRESELECTED quantity shows 88.8
  • The ACTUAL quantity shows 88.8.
B.Set the TEST switch to the center position.
  • The CKPT legend goes off
  • The AUTO REFUEL-END legend goes off
  • The FUEL QUANTITY changes from 88.8 to an indication of the quantity of fuel in the tanks
  • The ACTUAL quantity changes from 88.8 to an indication of the quantity of fuel in the tanks
  • The PRESELECTED FUEL QUANTITY value changes to the value given before the LTS test.
C.Set and hold the INC/DEC switch to DEC.
  • The PRESELECTED quantity changes to the actual value (or the actual value plus 0.1).
D.Release the INC/DEC switch.

Subtask 28-42-00-710-053-A ** ON A/C NOT FOR ALL
B. Operational Test of the Fuel Quantity Indicating-System (ACT(s) Installed)
   (1) Do these tests:
ACTION
RESULT
1.On the panel 800VU and 801VU:
On the panel 800VU:
A.Set the switches:
  • REFUEL VALVES to NORM
  • MODE SELECT to OFF
  • TEST to LTS.
  • the CKPT legend comes on
  • the AUTO REFUEL-END legend comes on
  • the FUEL QUANTITY shows 88.88 (for each tank)
  • the PRESELECTED quantity shows 88.8
  • the ACTUAL quantity shows 88.8.
B.Set the TEST switch to the center position.
  • the CKPT legend goes off
  • the AUTO REFUEL-END legend goes off
  • the FUEL QUANTITY changes from 88.8 to an indication of the quantity of fuel in the tanks
  • the ACTUAL quantity changes from 88.8 to an indication of the quantity of fuel in the tanks
  • the PRESELECTED FUEL QUANTITY value changes to the value given before the LTS test.
C.Set and hold the INC/DEC switch to DEC.
  • the PRESELECTED quantity changes to the actual value (or the actual value plus 0.1).
D.Release the INC/DEC switch.

2.On the panel 801VU:

A.Set the FQI Select Switch to the CTR+ACT position.
On the FUEL QTY panel 6QT:
  • the CTR shows the quantity of fuel in the CTR tank + the ACT1 and the ACT2.
B.Set the FQI Select Switch to CTR.
On the FUEL QTY panel 6QT:
  • the CTR shows the quantity of fuel in the CTR tank.
3.Set the FQI Select Switch to ACT1.
On the FUEL QTY panel 6QT:
  • the CTR shows the quantity of fuel in the ACT1.
4.Set the FQI Select Switch to ACT2.
On the FUEL QTY panel 6QT:
  • the CTR shows the quantity of fuel in the ACT2.
5. Close-up
Subtask 28-42-00-862-051-B
A. Aircraft Maintenance Configuration
   (1) If the aircraft is refueled with the battery power, on the refuel/defuel control panel (800VU):
  • put the BATT POWER switch to the NORM position.
   (2) If the external power is available, do the steps that follow:
     (a) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
     (b) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.02 06:18:04 UTC
"WTRUIB" 2025