Operational Check of Center-Tank Fuel-Pump Ground Fault Interrupter (GFI)

TASK 28-18-00-710-801-A
Operational Check of Center-Tank Fuel-Pump Ground Fault Interrupter (GFI)

ZONE: 122
ZONE: 210
FIN: 69QA ** ON A/C NOT FOR ALL
FIN: 70QA ** ON A/C NOT FOR ALL

1. Reason for the Job
Refer to the MPD TASK: 281800-10
OPERATIONAL CHECK OF CENTRE TANK FUEL PUMP GFI (SFAR88)
Two persons are necessary for this procedure.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
122	AVIONICS COMPARTMENT
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
822

C. 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 28-21-00-040-002-A	Deactivation of the Center Tank
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 52-41-00-010-002-A	Open the Avionics Compartment Doors for Access
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
ESPM 204650
Center-Tank Fuel-Pump GFI - Location and Detail ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 28-18-00-865-053-A ** ON A/C NOT FOR ALL

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 69QA (CNTORGFI CTR TK PUMP 1 SUPPLY)
121VU	FUEL/CTR TK/PUMP1 SPLY	29QA	P23
FOR FIN: 70QA (CNTORGFI CTR TK PUMP 2 SUPPLY)
121VU	FUEL/CTR TK/PUMP2 SPLY	30QA	P26

Subtask 28-18-00-010-054-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) in position at access door 822 of the avionics compartment.
(2) Open access door 822 (Ref. AMM TASK 52-41-00-010-002).
(3) To get access to GFI devices 69QA and 70QA:

On panel 107VU, loosen the quick release fasteners and remove the cover.

4. Procedure
Subtask 28-18-00-710-050-A ** ON A/C NOT FOR ALL

A. Operational Check of Center-Tank Fuel-Pump GFI
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(3) On the ECAM control panel, push (in) the FUEL pushbutton switch:

Make sure that the FUEL page shows on the ECAM lower Display Unit (DU).

(4) Make sure that the center tank contains a minimum of 500 kg (1102 lb) of fuel.
Do the test as follows:

ACTION	RESULT
1.In the cockpit, on overhead panel 40VU: Release (out) the MODE SEL pushbutton switch. Push (in) the CTR TK PUMP 1 and 2 pushbutton switches.	On overhead panel 40VU: The MAN light of the pushbutton switch comes on. The OFF lights of the pushbutton switches go off. On the ECAM lower DU: The CTR TK PUMP 1 shows green in-line (pump in operation). The CTR TK PUMP 2 shows green in-line (pump in operation).
2.In the avionics compartment, on panel 107VU, find the GFI devices: 69QA 70QA.
3.During the step that follows you must monitor the GFI trip/reset indicator button, when you push the related test button.
4.Push the test button on the GFI: 69QA 70QA.	On the related GFI, make sure that the trip/reset indicator button moves out to Tripped position. On overhead panel 40VU: The FAULT lights in the pushbutton switches come on. On the ECAM lower DU: The CTR TK PUMP 1 shows amber cross-line (pump abnormally off) The CTR TK PUMP 2 shows amber cross-line (pump abnormally off).
5.In the cockpit, on overhead panel 40VU: Release (out) the CTR TK PUMP 1 and 2 pushbutton switches. Push (in) the MODE SEL pushbutton switch.	On overhead panel 40VU: The OFF lights of the pushbutton switches come on. The MAN light of the pushbutton switch goes off. NOTE: The FAULT light of the MODE SEL pushbutton switch will come on if: The left and right wing tanks have less than 5000 kg (11000 lb) of fuel The center tank has more than 250 kg (600 lb) of fuel On refuel/defuel control-panel 800VU, the refuel/defuel MODE SELECT switch is in the OFF position. In these conditions, the ECAM will show the message AUTO FEED FAULT and FUEL MODE SEL-MAN (you can ignore it).
6.On the GFI: Push the trip/reset indicator until it is flush with GFI body.	On the GFI, the trip/reset indicator button is in reset position.
7.In the cockpit, on overhead panel 40VU: Release (out) the MODE SEL pushbutton switch. Push (in) the CTR TK PUMP 1 and 2 pushbutton switches.	On overhead panel 40VU: The MAN light of the pushbutton switch comes on. The OFF lights of the pushbutton switches go off. On the ECAM lower DU: The CTR TK PUMP 1 shows green in-line (pump in operation). The CTR TK PUMP 2 shows green in-line (pump in operation).
8.In the cockpit, on overhead panel 40VU: Release (out) the CTR TK PUMP 1 and 2 pushbutton switches. Push (in) the MODE SEL pushbutton switch.	On overhead panel 40VU: The OFF lights of the pushbutton switches come on. The MAN light of the pushbutton switch goes off. NOTE: The FAULT light of the MODE SEL pushbutton switch will come on if: The left and right wing tanks have less than 5000 kg (11000 lb) of fuel The center tank has more than 250 kg (600 lb) of fuel On refuel/defuel control-panel 800VU, the refuel/defuel MODE SELECT switch is in the OFF position. In these conditions, the ECAM will show the message AUTO FEED FAULT and FUEL MODE SEL-MAN (you can ignore it).

(5) During the above operational test, if GFI 69QA or 70QA does not operate correctly, do one of the steps that follow:

Replace the defective GFI 69QA or 70QA before the next flight ESPM 204650.
or
Deactivate the center tank fuel-pumps (Ref. AMM TASK 28-21-00-040-002). If MMEL 28-21-02 is applicable, deactivate the center tank fuel-pumps (Ref. AMM D/O 28-21-00-04).

5. Close-up
Subtask 28-18-00-410-054-A ** ON A/C NOT FOR ALL

A. Close Access
(1) On panel 107VU, install the cover and tighten the quick release fasteners.
(2) Close access door 822 (Ref. AMM TASK 52-41-00-410-002).
(3) Remove the access platform(s).

Subtask 28-18-00-860-053-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:17:18 UTC