Operational Test of the AFT Cargo-Compartment Ventilation-System

TASK 21-28-00-710-006-A
Operational Test of the AFT Cargo-Compartment Ventilation-System

1. Reason for the Job
There are alternative procedures in this task:

For aircraft WITH ventilation isolation valve position indications on the ECAM COND page.
For aircraft WITHOUT ventilation isolation valve position indications on the ECAM COND page.
Do a check of the aircraft configuration with regard to these ECAM indications before you do the test.

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
162DW
151EW
151VW

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 25-55-11-000-003-A	Removal of the Sidewall Panels in the Aft Cargo Compartment - FR47/FR59
TASK 25-55-11-400-003-A	Installation of the Sidewall Panels in the Aft Cargo Compartment - FR47/FR59
TASK 25-55-12-000-001-A	Removal of the Aft Cargo-Compartment Partition at FR65
TASK 25-55-12-400-001-A	Installation of the Aft Cargo-Compartment Partition at FR65
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump

3. Job Set-up
Subtask 21-28-00-861-070-A ** ON A/C NOT FOR ALL

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

Subtask 21-28-00-865-072-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT/CTL & MONG	31HN	C07
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT & HTG/CTL & MONG	31HN	C07
** ON A/C NOT FOR ALL
122VU	AIR COND/ZONE TEMP CTL/28VDC/SYS2	4HK	V20
122VU	AIR COND/ZONE TEMP CTL/28VDC/SYS1	3HK	V19
122VU	AIR COND/ZONE TEMP CTL/115VAC/SYS2	2HK	V18
122VU	AIR COND/ZONE TEMP CTL/115VAC/SYS1	1HK	V17
** ON A/C NOT FOR ALL
122VU	AIR COND/AFT CARGO VENT/FAN	30HN	S22

Subtask 21-28-00-865-090-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT/CTL & MONG	31HN	C07
** ON A/C NOT FOR ALL
49VU	AIR COND/AFT CARGO/VENT & HTG/CTL & MONG	31HN	C07

Subtask 21-28-00-010-065-A ** ON A/C NOT FOR ALL

D. Get Access

NOTE: This procedure is only applicable for aircraft WITHOUT ventilation isolation valve positions indicated on the ECAM COND page.

(1) Open the AFT cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-001).
(2) Put the ACCESS PLATFORM 2M (6 FT) at the AFT cargo-compartment door 826.
(3) Remove the access panel 162DW (Ref. AMM TASK 25-55-12-000-001).
(4) Remove the access panel 151EW (Ref. AMM TASK 25-55-11-000-003).

Subtask 21-28-00-010-065-C ** ON A/C NOT FOR ALL

D. Get Access

NOTE: This procedure is only applicable for aircraft WITHOUT ventilation isolation valve positions indicated on the ECAM COND page.

Subtask 21-28-00-860-056-A ** ON A/C NOT FOR ALL

E. Aircraft Maintenance Configuration

NOTE: This procedure is only applicable for aircraft WITHOUT ventilation isolation valve positions indicated on the ECAM COND page.

(1) On the overhead panel 22VU make sure that the white OFF light in the AFT ISOL VALVE pushbutton switch is on.

Subtask 21-28-00-860-063-A ** ON A/C NOT FOR ALL

F. Aircraft Maintenance Configuration

NOTE: This procedure is only applicable for aircraft WITH ventilation isolation valve positions indicated on the ECAM COND page.

(1) On the overhead panel 22VU make sure that the white OFF light in the AFT ISOL VALVE pushbutton switch is on.
(2) Do the EIS start procedure (Ref. AMM TASK 31-60-00-860-001).
(3) Make sure that the COND page shows on the ECAM lower display unit.

4. Procedure
Subtask 21-28-00-710-059-A ** ON A/C NOT FOR ALL

A. Do the Operational Test of the Ventilation System

NOTE: This procedure is only applicable for aircraft WITHOUT ventilation isolation valve positions indicated on the ECAM COND page.
During the test you must visually monitor the isolation valves for correct movement sequence.

ACTION	RESULT
1.On the panel 22VU: push the AFT ISOL VALVE pushbutton switch.	On the panel 22VU: the white OFF light in the AFT ISOL VALVE pushbutton switch goes off.
	In the AFT cargo compartment: the inlet and outlet isolation valves open. the extraction fan operates after approx. 15 s.
2.On the panel 22VU: push the AFT ISOL VALVE pushbutton switch.	On the panel 22VU: the white OFF light in the AFT ISOL VALVE pushbutton switch comes on.
	In the AFT cargo compartment: the extraction fan stops. the inlet and outlet isolation valves close.

Subtask 21-28-00-710-065-A ** ON A/C NOT FOR ALL

B. Do the Operational Test of the Ventilation System

NOTE: This procedure is only applicable for aircraft WITH ventilation isolation valve positions indicated on the ECAM COND page.

ACTION	RESULT
1.On the panel 22VU: push the AFT ISOL VALVE pushbutton switch.	On the panel 22VU: the white OFF light in the AFT ISOL VALVE pushbutton switch goes off.
	On the ECAM lower display units: the inlet and outlet isolation valve symbols open and change to green.
2.On the panel 22VU: push the AFT ISOL VALVE pushbutton switch.	On the panel 22VU: the white OFF light in the AFT ISOL VALVE pushbutton switch comes on.
	On the ECAM lower display unit: the inlet and outlet isolation valve symbols close and change to amber.

5. Close-up
Subtask 21-28-00-860-057-A ** ON A/C NOT FOR ALL

A. Do the EIS stop procedure

NOTE: This procedure is only applicable for aircraft WITH ventilation isolation valve positions indicated on the ECAM COND page.

(Ref. AMM TASK 31-60-00-860-002).

Subtask 21-28-00-410-066-A ** ON A/C NOT FOR ALL

B. Close Access

NOTE: This procedure is only applicable for aircraft WITHOUT ventilation isolation valve positions indicated on the ECAM COND page.

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel 162DW (Ref. AMM TASK 25-55-12-400-001).
(3) Install the access panel 151EW (Ref. AMM TASK 25-55-11-400-003).
(4) Remove the access platform(s).
(5) Close the AFT cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-002).

Subtask 21-28-00-410-066-C ** ON A/C NOT FOR ALL

B. Close Access

NOTE: This procedure is only applicable for aircraft WITHOUT ventilation isolation valve positions indicated on the ECAM COND page.

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panel 162DW (Ref. AMM TASK 25-55-12-400-001).
(3) Install the access panel 151VW (Ref. AMM TASK 25-55-11-400-003).
(4) Remove the access platform(s).
(5) Close the AFT cargo-compartment door 826 (Ref. AMM TASK 52-30-00-860-002).

Subtask 21-28-00-862-066-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 04:25:49 UTC