Operational Test of the Extract-Fan Pressure Switch (without the CFDS)

TASK 21-26-11-710-001-A
Operational Test of the Extract-Fan Pressure Switch (without the CFDS)

FIN: 30HQ

1. Reason for the Job
Test after the removal/installation of the extract-fan pressure switch 30HQ if the CFDS is unserviceable.
2. Job Set-up Information
A. 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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure

3. Job Set-up
Subtask 21-26-11-861-052-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 21-26-11-865-053-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	AIR COND/AVNCS VENT/CTL	6HQ	D06
49VU	AIR COND/AVNCS VENT/CTL	5HQ	D05
122VU	AIR COND/AVNCS/VENT/MONG	3HQ	Y17
** ON A/C NOT FOR ALL
123VU	AVNCS VENT/EXTC/FAN	2HQ	AE02
** ON A/C ALL
123VU	AVNCS VENT/BLOWER/FAN	1HQ	AD10
** ON A/C NOT FOR ALL
123VU	AVNCS VENT/EXTC/FAN	2HQ	AC04

Subtask 21-26-11-869-053-A

C. Aircraft Maintenance Configuration
(1) Make sure that the throttle control levers of the engines 1 and 2 are at idle.
(2) On the VENTILATION section of the overhead control and indicating panel 22VU:

Make sure that the BLOWER and EXTRACT pushbutton switches are in the AUTO configuration (pushed and with the FAULT and OVRD legends off).

Subtask 21-26-11-860-050-A

D. Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

4. Procedure
Subtask 21-26-11-710-051-A

A. Do this test:

ACTION	RESULT
1.On the rear circuit breaker panel 122VU: open the circuit breaker 3HQ.	On the VENTILATION section of the overhead control and indicating panel 22VU: the FAULT legend of the EXTRACT pushbutton switch comes on (the fault legend of the BLOWER pushbutton switch also comes on). On the upper ECAM display unit: the AVNCS SYS FAULT message comes into view after approximately 10 seconds.
2.On the rear circuit breaker panel 122VU: close the circuit breaker 3HQ.	On the VENTILATION section of the overhead control and indicating panel 22VU: the FAULT legend of the EXTRACT pushbutton switch goes off after 10 seconds (the FAULT legend of the BLOWER pushbutton switch also goes off).
	On the upper ECAM display unit: the AVNCS SYS FAULT message goes out of view after 10 seconds.

5. Close-up
Subtask 21-26-11-860-051-A

A. Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).

Subtask 21-26-11-862-052-A

B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:11:02 UTC