Operational Check of Automatic Fire Extinguishing Circuit and Test APU LP Fuel Valve Operation using each Individual Motor in Turn and Test APU Emergency...

TASK 26-22-00-710-002-A
Operational Check of Automatic Fire Extinguishing Circuit and Test APU LP Fuel Valve Operation using each Individual Motor in Turn and Test APU Emergency...

WARNING: BE VERY CAREFUL WHEN YOU MOVE A FULL FIRE EXTINGUISHER BOTTLE. A SUDDEN OR HEAVY SHOCK TO A FULL BOTTLE CAN CAUSE UNWANTED DISCHARGE AND INJURY TO PERSONS.

ZONE: 210

1. Reason for the Job
Refer to the MPD TASK: 262200-02
OPERATIONAL CHECK OF AUTOMATIC FIRE EXTINGUISHING CIRCUIT AND TEST APU LP FUEL VALVE OPERATION USING EACH INDIVIDUAL MOTOR IN TURN AND TEST APU EMERGENCY SHUTDOWN CIRCUIT
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

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-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-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 26-22-00-860-052-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002) or (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).

Subtask 26-22-00-865-070-A

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	APU/FUEL/PUMP/CTL	3QC	M38

Subtask 26-22-00-865-054-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	APU/FIRE AND OVHT/DET/LOOP B	2WG	L44
121VU	APU/FIRE AND OVHT/DET/LOOP A	1WG	L43
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41
121VU	APU/AUTO/EXTIG/GND/TEST	30WF	L40
121VU	APU/FIRE/EXTIG/SQUIB/B	2WF	L39
121VU	APU/FIRE/EXTIG/SQUIB/A	1WF	L38
121VU	APU/FIRE/LP VALVE/NORM	4WF	M42
121VU	APU/FIRE/LP VALVE/STBY	3WF	M41
121VU	APU/FUEL/LP VALVE/CTL	1QF	M40
121VU	APU/FUEL/LP VALVE/SPLY	2QF	M39
121VU	EIS/HORN/SPLY	2WC	P09

4. Procedure
Subtask 26-22-00-710-135-A

WARNING: DO NOT PUSH THE TEST PUSHBUTTON SWITCH ON THE APU/AUTO EXTING SECTION OF OVERHEAD PANEL 50VU WHILE THE APU IS IN OPERATION. IF YOU DO, DISCHARGE OF THE APU-FIRE EXTINGUISHER BOTTLE CAN OCCUR.

A. Test for ECB PN: 304640-2

ACTION	RESULT
1.In the INT LT section of overhead panel 25VU: Set the ANN LT switch to the TEST position.	In the cockpit: All annunciator lights come on fully brightly.
2.In the INT LT section of overhead panel 25VU: Set the ANN LT switch to the BRT position.	In the cockpit: The applicable annunciator lights go off.
3.On circuit-breaker panel 121VU: Open circuit breaker APU/FUEL/LP VALVE/CTL 1QF.
4.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
5.On the ECAM control panel: Push the FUEL pushbutton switch.	On the ECAM lower display unit: The FUEL page comes into view.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
6.In the APU/AUTO EXTING section of overhead panel 50VU: Push the TEST pushbutton switch. NOTE: This test causes a spurious WARNING in ECAM (APU FIRE LOOP A FAULT) because of a FDU hardware modification.	In the APU/AUTO EXTING section of overhead panel 50VU: The ON legend of the APU/AUTO EXTING/TEST pushbutton switch comes on. The OK legend of the APU/AUTO EXTING/TEST pushbutton switch comes on after approximately 10 seconds.
	On APU FIRE panel 20VU: The light of the APU FIRE pushbutton switch comes on. The first and third columns of the APU FIRE lights come on.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
	On external power control panel 108VU: The APU FIRE light comes on. The ground warning horn operates. NOTE: When the ground warning horn operates, you can switch it off when you open circuit breaker EIS/HORN/SPLY 2WC. This prevents the ground warning horn operates when not necessary.
7.In the APU/AUTO EXTING section of panel 50VU: Push the RESET pushbutton switch.	In the APU/AUTO EXTING section of panel 50VU: The ON legend of the TEST pushbutton switch goes off. The OK legend of the TEST pushbutton switch goes off.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch goes off. The first and third columns of the APU FIRE lights go off.
	On external power panel 108VU: The APU FIRE light goes off. If circuit breaker 2WC was not opened: The ground warning horn goes off.
	On overhead panel 25VU: The FAULT legend in the APU MASTER SW pushbutton switch goes off.
8.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
9.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position and then in closed position.
10.On circuit-breaker panel 121VU: Close circuit breaker APU/FUEL/LP VALVE/CTL 1QF, Open circuit breaker APU/FUEL/LP VALVE/SPLY 2QF.
11.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
12.On the ECAM control panel: Push the FUEL pushbutton switch.	On the ECAM lower display unit: The FUEL page comes into view.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
13.In the APU/AUTO EXTING section of panel 50VU: Push the TEST pushbutton switch. NOTE: This test causes a spurious WARNING in ECAM (APU FIRE LOOP A FAULT) because of a FDU hardware modification.	In the APU/AUTO EXTING section of panel 50VU: The ON legend of the TEST pushbutton switch comes on. The OK legend of the TEST pushbutton switch comes on after approximately 10 seconds.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch comes on. The first and third columns of the APU FIRE lights come on.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
	On external power control panel 108VU: The APU FIRE light comes on. If circuit breaker 2WC was not opened: The ground warning horn operates.
14.In the APU/AUTO EXTING section of panel 50VU: Push the RESET pushbutton switch.	In the APU/AUTO EXTING section of panel 50VU: The ON legend in the TEST pushbutton switch goes off. The OK legend in the TEST pushbutton switch goes off.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch goes off. The first and third columns of the APU FIRE lights go off.
	On external power control panel 108VU: The APU FIRE light goes off. If circuit breaker 2WC was not opened: The ground warning horn goes off.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off.
15.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position and then in closed position.
16.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
17.On circuit-breaker panel 121VU: Close circuit breaker APU/FUEL/LP VALVE/SPLY 2QF. If circuit breaker 2WC was opened: Close circuit breaker 2WC.
18.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
19.On the ECAM control panel: Push the FUEL pushbutton switch.	On the ECAM lower display unit: The FUEL page comes into view.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
20.On external power control panel 108VU: Push and hold the APU SHUT OFF pushbutton switch (guard in red).	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
21.On external power control panel 108VU: Release the APU SHUT OFF pushbutton switch and close the guard.	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off.
22.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
23.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position and then in closed position.
24.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
25.On APU FIRE panel 20VU: Lift the guard and release the APU FIRE pushbutton switch.	On APU FIRE panel 20VU: The SQUIB legend of the AGENT pushbutton switch comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
26.On APU FIRE panel 20VU: Push the APU FIRE pushbutton switch and close the guard.	On APU FIRE panel 20VU: The SQUIB legend of the AGENT pushbutton switch goes off.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off.
27.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position and then in closed position.
28.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.

Subtask 26-22-00-710-137-B

B. Test for ECB other than PN: 3888394-XXXXXX, 3888579-XXX, 450000XX, 304640-2 and 304817-X

ACTION	RESULT
1.In the INT LT section of overhead panel 25VU: Set the ANN LT switch to the TEST position.	In the cockpit: All annunciator lights come on fully brightly.
2.In the INT LT section of overhead panel 25VU: Set the ANN LT switch to the BRT position.	In the cockpit: The applicable annunciator lights go off.
3.On circuit-breaker panel 121VU: Open circuit breaker APU/FUEL/LP VALVE/CTL 1QF.
4.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
5.On the ECAM control panel: Push the FUEL pushbutton switch.	On the ECAM lower display unit: The FUEL page comes into view.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
6.In the APU/AUTO EXTING section of panel 50VU: Push the TEST pushbutton switch. NOTE: This test causes a spurious WARNING in ECAM (APU FIRE LOOP A FAULT) because of a FDU hardware modification.	In the APU/AUTO EXTING section of overhead panel 50VU: The ON legend of the TEST pushbutton switch comes on. The OK legend of the TEST pushbutton switch comes on after approximately 3 seconds.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch comes on. The first and third columns of the APU FIRE lights come on.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
	On external power control panel 108VU: The APU FIRE light comes on. The ground warning horn operates. NOTE: When the ground warning horn operates, you can switch it off when you open circuit breaker EIS/HORN/SPLY 2WC. This prevents the ground warning horn operates when not necessary.
7.In the APU/AUTO EXTING section of panel 50VU: Push the RESET pushbutton switch.	In the APU/AUTO EXTING section of panel 50VU: The ON legend of the TEST pushbutton switch goes off. The OK legend of the TEST pushbutton switch goes off.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch goes off. The first and third columns of the APU FIRE lights go off.
	On external power panel 108VU: The APU FIRE light goes off. If circuit breaker 2WC was not opened: The ground warning horn goes off.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off.
8.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning MASTER SW....OFF goes off.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position and then in closed position.
9.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
10.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.
11.On circuit-breaker panel 121VU: Close circuit breaker APU/FUEL/LP VALVE/CTL 1QF, Open circuit breaker APU/FUEL/LP VALVE/SPLY 2QF.
12.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch to the ON position.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
13.On the ECAM control panel: Push the FUEL pushbutton switch.	On the ECAM lower display unit: The FUEL page comes into view.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
14.In the APU/AUTO EXTING section of panel 50VU: Push the TEST pushbutton switch. NOTE: This test causes a spurious WARNING in ECAM (APU FIRE LOOP A FAULT) because of a FDU hardware modification.	In the APU/AUTO EXTING section of panel 50VU: The ON legend of the TEST pushbutton switch comes on. The OK legend of the TEST pushbutton switch comes on after approximately 3 seconds.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch comes on. The first and third columns of the APU FIRE lights come on.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
	On external power control panel 108VU: The APU FIRE light comes on. If circuit breaker 2WC was not opened: The ground warning horn operates.
15.In the APU/AUTO EXTING section of panel 50VU: Push the RESET pushbutton switch.	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off.
	In the APU/AUTO EXTING section of panel 50VU: The ON legend of the TEST pushbutton switch goes off. The OK legend of the TEST pushbutton switch goes off.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch goes off. The first and third columns of the APU FIRE lights go off.
	On external power control panel 108VU: The APU FIRE light goes off. If circuit breaker 2WC was not opened: The ground warning horn goes off.
16.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning MASTER SW....OFF goes off.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position and then in closed position.
17.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
18.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.
19.On circuit-breaker panel 121VU: Close circuit breaker APU/FUEL/LP VALVE/SPLY 2QF. If circuit breaker 2WC was opened: Close circuit breaker 2WC.
20.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch to the ON position.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
21.On external power control panel 108VU: Push and hold the APU SHUT OFF pushbutton switch (guard in red).	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
22.On external power control panel 108VU: Release the APU SHUT OFF pushbutton switch and close the guard.	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off.
23.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
24.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF goes off.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position and then in closed position.
25.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.
26.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch to the ON position.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
27.On APU FIRE panel 20VU: Lift the guard and release the APU FIRE pushbutton switch.	On APU FIRE panel 20VU: The SQUIB legend of the AGENT pushbutton switch comes on.
	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
28.On APU FIRE panel 20VU: Push the APU FIRE pushbutton switch and close the guard.	On APU FIRE panel 20VU: The SQUIB legend of the AGENT pushbutton switch goes off.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off.
29.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning MASTER SW....OFF goes off.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position and then in closed position.
30.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
31.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.

Subtask 26-22-00-710-138-B

C. Test for ECB PN: 3888394-XXXXXX, 3888579-XXX and 450000XX

ACTION	RESULT
1.In the INT LT section of overhead panel 25VU: Set the ANN LT switch to the TEST position.	In the cockpit: All annunciator lights come on fully brightly.
2.In the INT LT section of overhead panel 25VU: Set the ANN LT switch to the BRT position.	In the cockpit: The applicable annunciator lights go off.
3.On circuit-breaker panel 121VU: Open circuit breaker APU/FUEL/LP VALVE/CTL 1QF.
4.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
5.On the ECAM control panel: Push the FUEL pushbutton switch.	On the ECAM lower display unit: The FUEL page comes into view.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
6.In the APU/AUTO EXTING section of overhead panel 50VU: Push the TEST pushbutton switch. NOTE: This test causes a spurious WARNING in ECAM (APU FIRE LOOP A FAULT) because of a FDU hardware modification.	In the APU/AUTO EXTING section of overhead panel 50VU: The ON legend of the TEST pushbutton switch comes on. The OK legend of the TEST pushbutton switch comes on after approximately 3 seconds.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch comes on. The first and third columns of the APU FIRE lights come on.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
	On external power control panel 108VU: The APU FIRE light comes on. The ground warning horn operates. NOTE: When the ground warning horn operates, you can switch it off when you open circuit breaker EIS/HORN/SPLY 2WC. This prevents the ground warning horn operates when not necessary.
7.In the APU/AUTO EXTING section of panel 50VU: Push the RESET pushbutton switch.	In the APU/AUTO EXTING section of panel 50VU: The ON legend of the TEST pushbutton switch goes off. The OK legend of the TEST pushbutton switch goes off.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch goes off. The first and third columns of the APU FIRE lights go off.
	On external power panel 108VU: The APU FIRE light goes off. If circuit breaker 2WC was not opened: The ground warning horn goes off.
8.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off. The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning MASTER SW....OFF goes off.
9.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
10.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.
11.On circuit-breaker panel 121VU: Close circuit breaker APU/FUEL/LP VALVE/CTL 1QF, Open circuit breaker APU/FUEL/LP VALVE/SPLY 2QF.
12.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch to the ON position.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
13.On the ECAM control panel: Push the FUEL pushbutton switch.	On the ECAM lower display unit: The FUEL page comes into view.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
14.In the APU/AUTO EXTING section of panel 50VU: Push the TEST pushbutton switch. NOTE: This test causes a spurious WARNING in ECAM (APU FIRE LOOP A FAULT) because of a FDU hardware modification.	In the APU/AUTO EXTING section of panel 50VU: The ON legend of the TEST pushbutton switch comes on. The OK legend of the TEST pushbutton switch comes on after approximately 3 seconds.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch comes on. The first and third columns of the APU FIRE lights come on.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
	On external power control panel 108VU: The APU FIRE light comes on. If circuit breaker 2WC was not opened: The ground warning horn operates.
15.In the APU/AUTO EXTING section of panel 50VU: Push the RESET pushbutton switch.	In the APU/AUTO EXTING section of panel 50VU: The ON legend of the TEST pushbutton switch goes off. The OK legend of the TEST pushbutton switch goes off.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch goes off. The first and third columns of the APU FIRE lights go off.
	On external power control panel 108VU: The APU FIRE light goes off. If circuit breaker 2WC was not opened: The ground warning horn goes off.
16.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off. The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning MASTER SW....OFF goes off.
17.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
18.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.
19.On circuit-breaker panel 121VU: Close circuit breaker APU/FUEL/LP VALVE/SPLY 2QF. If circuit breaker 2WC was opened: Close circuit breaker 2WC.
20.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
21.On external power control panel 108VU: Push and hold the APU SHUT OFF pushbutton switch (guard in red).	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
22.On external power control panel 108VU: Release the APU SHUT OFF pushbutton switch and close the guard.
23.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
24.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off. The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning MASTER SW....OFF goes off.
25.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.
26.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
27.On APU FIRE panel 20VU: Lift the guard and release the APU FIRE pushbutton switch.	On APU FIRE panel 20VU: The SQUIB legend of the AGENT pushbutton switch comes on.
	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
28.On APU FIRE panel 20VU: Push the APU FIRE pushbutton switch and close the guard.	On APU FIRE panel 20VU: The SQUIB legend of the AGENT pushbutton switch goes off.
29.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off. The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning MASTER SW....OFF goes off.
30.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
31.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.

Subtask 26-22-00-710-139-B

D. Test for ECB PN: 304817-X

ACTION	RESULT
1.In the INT LT section of overhead panel 25VU: Set the ANN LT switch to the TEST position.	In the cockpit: All annunciator lights come on fully brightly.
2.In the INT LT section of overhead panel 25VU: Set the ANN LT switch to the BRT position.	In the cockpit: The applicable annunciator lights go off.
3.On circuit-breaker panel 121VU: Open circuit breaker APU/FUEL/LP VALVE/CTL 1QF.
4.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
5.On the ECAM control panel: Push the FUEL pushbutton switch.	On the ECAM lower display unit: The FUEL page comes into view.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
6.In the APU/AUTO EXTING section of overhead panel 50VU: Push the TEST pushbutton switch. NOTE: This test causes a spurious WARNING in ECAM (APU FIRE LOOP A FAULT) because of a FDU hardware modification.	In the APU/AUTO EXTING section of overhead panel 50VU: The ON legend of the TEST pushbutton switch comes on. The OK legend of the TEST pushbutton switch comes on after approximately 3 seconds.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch comes on. The first and third columns of the APU FIRE lights come on.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
	On external power control panel 108VU: The APU FIRE light comes on. The ground warning horn operates. NOTE: When the ground warning horn operates, you can switch it off when you open circuit breaker EIS/HORN/SPLY 2WC. This prevents the ground warning horn operates when not necessary.
7.In the APU/AUTO EXTING section of panel 50VU: Push the RESET pushbutton switch.	In the APU/AUTO EXTING section of panel 50VU: The ON legend of the TEST pushbutton switch goes off. The OK legend of the TEST pushbutton switch goes off.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch goes off. The first and third columns of the APU FIRE lights go off.
	On external power panel 108VU: The APU FIRE light goes off. If circuit breaker 2WC was not opened: The ground warning horn goes off.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off.
8.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning MASTER SW....OFF goes off.
9.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
10.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.
11.On circuit-breaker panel 121VU: Close circuit breaker APU/FUEL/LP VALVE/CTL 1QF, Open circuit breaker APU/FUEL/LP VALVE/SPLY 2QF.
12.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch to the ON position.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
13.On the ECAM control panel: Push the FUEL pushbutton switch.	On the ECAM lower display unit: The FUEL page comes into view.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
14.In the APU/AUTO EXTING section of panel 50VU: Push the TEST pushbutton switch. NOTE: This test causes a spurious WARNING in ECAM (APU FIRE LOOP A FAULT) because of a FDU hardware modification.	In the APU/AUTO EXTING section of panel 50VU: The ON legend of the TEST pushbutton switch comes on. The OK legend of the TEST pushbutton switch comes on after approximately 3 seconds.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch comes on. The first and third columns of the APU FIRE lights come on.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
	On external power control panel 108VU: The APU FIRE light comes on. If circuit breaker 2WC was not opened: The ground warning horn operates.
15.In the APU/AUTO EXTING section of panel 50VU: Push the RESET pushbutton switch.	In the APU/AUTO EXTING section of panel 50VU: The ON legend of the TEST pushbutton switch goes off. The OK legend of the TEST pushbutton switch goes off.
	On APU FIRE panel 20VU: The APU FIRE light of the APU FIRE pushbutton switch goes off. The first and third columns of the APU FIRE lights go off.
	On external power control panel 108VU: The APU FIRE light goes off. If circuit breaker 2WC was not opened: The ground warning horn goes off.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off.
16.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning MASTER SW....OFF goes off.
17.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
18.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.
19.On circuit-breaker panel 121VU: Close circuit breaker APU/FUEL/LP VALVE/SPLY 2QF. If circuit breaker 2WC was opened: Close circuit breaker 2WC.
20.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
21.On external power control panel 108VU: Push and hold the APU SHUT OFF pushbutton switch (guard in red).	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
22.On external power control panel 108VU: Release the APU SHUT OFF pushbutton switch and close the guard.	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off.
23.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
24.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning MASTER SW....OFF goes off.
25.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.
26.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in open position.
27.On APU FIRE panel 20VU: Lift the guard and release the APU FIRE pushbutton switch.	On APU FIRE panel 20VU: The SQUIB legend of the AGENT pushbutton switch comes on.
	On the ECAM upper display unit: The warning APU EMER SHUT DOWN MASTER SW....OFF comes on.
	On glareshield panels 130VU and 131VU: The MASTER CAUT lights come on. A single chime operates.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch comes on.
	On the FUEL page of the ECAM lower display unit: The APU LP fuel-valve symbol is shown in closed position.
28.On APU FIRE panel 20VU: Push the APU FIRE pushbutton switch and close the guard.	On APU FIRE panel 20VU: The SQUIB legend of the AGENT pushbutton switch goes off.
	On overhead panel 25VU: The FAULT legend of the APU MASTER SW pushbutton switch goes off.
29.On overhead panel 25VU: Release the APU MASTER SW pushbutton switch.	On overhead panel 25VU: The ON legend of the APU MASTER SW pushbutton switch goes off.
	On the ECAM upper display unit: The warning MASTER SW....OFF goes off.
30.On glareshield panel 130VU or 131VU: Push the MASTER CAUT pushbutton switch.	On glareshield panels 130VU and 131VU: The MASTER CAUT lights go off.
31.On overhead panel 25VU: Push the APU MASTER SW pushbutton switch two times (on/off) to reset the ECB.	On the ECAM upper display unit: The warning APU EMER SHUT DOWN goes off.

5. Close-up
Subtask 26-22-00-865-105-A

A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	APU/FUEL/PUMP/CTL	3QC	M38

Subtask 26-22-00-860-053-A

B. Put the aircraft back to its initial 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) or (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.03.31 23:45:30 UTC