Check of the High Level Fuel-Detection-System, When an Inner Tank Indication is Unserviceable

TASK 28-40-00-040-803-A
Check of the High Level Fuel-Detection-System, When an Inner Tank Indication is Unserviceable

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.

1. Reason for the Job
MMEL 28-07-01-04B
INNER TANK FUEL QUANTITY INDICATION ON THE FUEL SD PAGE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
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 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-25-00-650-001-A	Pressure Defuel
TASK 28-46-00-710-001-A	Test of the Tank High-Level Sensing-System

3. Job Set-up
Subtask 28-40-00-941-075-A ** ON A/C NOT FOR ALL

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) You must obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

Subtask 28-40-00-860-081-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the aircraft is refueled for the subsequent flight.
(2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

4. Procedure
Subtask 28-40-00-040-087-A ** ON A/C NOT FOR ALL

A. Make sure that the Fuel Tank Contains the Correct Quantity of Fuel (and not contamination such as unwanted free water).
(1) Do the procedure that follows:
(a) Do a test of the high level sensors (Ref. AMM TASK 28-46-00-710-001).
(b) Fully refuel the wing tanks (Ref. AMM TASK 12-11-28-650-003) until:

The high level sensors operate
and
On the Refuel/Defuel Control Panel 800VU the high level lights come on.

(c) Multiply the total volume of the fuel refueled by its specific gravity. The result is the total mass of the fuel refueled.

NOTE: The total quantity of the fuel is equal to the maximum capacity of the wing tanks. The difference between the maximum capacity and the quantity of the fuel uplifted is the quantity of the fuel initially available before the refuel.

(d) If necessary, defuel the wing tanks to keep the necessary quantity of fuel for the subsequent flight (Ref. AMM TASK 28-25-00-650-001).

5. Close-up
Subtask 28-40-00-860-080-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(2) Put a WARNING NOTICE(S) in position to tell the flight crew that:

the applicable wing tank inner-cell ECAM fuel quantity indication is unserviceable.

(3) Write an applicable entry in the aircraft technical log.

Subtask 28-40-00-942-072-A ** ON A/C NOT FOR ALL

B. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the SAFETY BARRIERS.
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:18:04 UTC