Operational Test of the Flow Control Valves Closing

TASK 21-51-00-710-003-A
Operational Test of the Flow Control Valves Closing

WARNING: MAKE SURE THAT THE FWD AVIONICS ACCESS DOOR 811 IS OPEN WITH A WARNING PLACARD ATTACHED TO IT. THE WARNING NOTICE MUST TELL PERSONS NOT TO CLOSE THE DOOR. THIS PREVENTS ACCIDENTAL PRESSURIZATION OF THE AIRCRAFT.

FIN: 11HB ** ON A/C NOT FOR ALL
FIN: 23HB ** ON A/C NOT FOR ALL
FIN: 24HB ** ON A/C NOT FOR ALL
FIN: 8HB ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 12-33-21-618-001-A-01	Pre-conditioning through the HP Ground Connection
TASK 12-33-21-618-001-A-02	Pre-conditioning with the APU
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 21-51-00-861-053-A

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

Subtask 21-51-00-865-053-A

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/TEMP CTL/SYS 1 CHAN B/28VDC	52HH	D08
** 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
122VU	AIR COND/PACK TEMP/CTL SYS1/2/115VAC	21HH	W22
122VU	AIR COND/PACK TEMP/CTL SYS1/2/28VDC	23HH	W21
122VU	AIR COND/PACK TEMP/CTL SYS1/1/115VAC	1HH	X22
122VU	AIR COND/PACK TEMP/CTL SYS1/1/28VDC	3HH	X21
122VU	AIR COND/PACK TEMP CTL SYS2/2/28VDC	24HH	Y21
122VU	AIR COND/PACK TEMP CTL SYS2/2/115VAC	22HH	Y20
122VU	AIR COND/PACK TEMP CTL SYS2/1/28VDC	4HH	Y19
122VU	AIR COND/PACK TEMP CTL SYS2/1/115VAC	2HH	Y18
** ON A/C NOT FOR ALL
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/115VAC	53HH	W22
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/28VDC	55HH	W21
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/115VAC	49HH	X22
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/28VDC	51HH	X21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/28VDC	56HH	Y21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/115VAC	54HH	Y20
122VU	AIR COND/TEMP CTL SYS 1/CHAN B/115VAC	50HH	Y18

Subtask 21-51-00-860-053-A ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Open the avionics-bay access door 811.
(2) Put a warning notice in position to tell persons not to close the avionics-bay access door 811.
(3) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(4) Make sure that the BLEED page is shown on the ECAM lower display unit.
(5) On the panel 30VU make sure that:

the PACK 1 and the PACK 2 pushbutton switches are in the off position (the OFF legends are on),
the PACK FLOW selector is in the NORM position and,
the HOT AIR pushbutton switch is in the off position (the OFF legend is on).

Subtask 21-51-00-860-053-B ** ON A/C NOT FOR ALL

the PACK 1 and the PACK 2 pushbutton switches are in the off position (the OFF legends are on),
the ECON FLOW pushbutton switch is in the off position (the ON legend is off) and,
the HOT AIR pushbutton switch is in the off position (the OFF legend is on).

Subtask 21-51-00-618-051-A

D. Do the pre-conditioning through the HP ground connection (Ref. AMM TASK 12-33-21-618-001) or with the APU (Ref. AMM TASK 12-33-21-618-001).

4. Procedure

WARNING: MAKE SURE THAT THERE ARE NO PERSONS OR EQUIPMENT NEAR THE RAM AIR OUTLETS. HOT EXHAUST GASES CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

Subtask 21-51-00-710-052-A

A. Operational Test of the Flow Control Valves Closing

ACTION	RESULT
1.On the panel 30VU: push the PACK 1 and PACK 2 pushbutton switches to the on position.	On the panel 30VU: the OFF legends on the PACK 1 and PACK 2 pushbutton switches go off.
	On the ECAM lower display unit: the L and R flow control valve symbols open.
push the PACK 1 and PACK 2 pushbutton switches to the off position..	On the panel 30VU: the OFF legends on the PACK 1 and PACK 2 pushbutton switches come on.
	On the ECAM lower display panel: the L and R flow control valve symbols close.

5. Close-up
Subtask 21-51-00-860-054-A

A. Aircraft Maintenance Configuration
(1) Stop the pre-conditioning through the HP ground connection (Ref. AMM TASK 12-33-21-618-001).
(2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(3) Remove the WARNING NOTICE(S).
(4) Close the avionics-bay access door 811.

Subtask 21-51-00-862-052-A

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

[Rev.10 from 2021] 2026.04.01 08:26:22 UTC