Pressurization of the Bleed System with the APU

TASK 36-12-00-860-805-A
Pressurization of the Bleed System with the APU

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.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
811

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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 49-00-00-860-008-A	APU Start by External Power
TASK 49-00-00-860-008-A-01	APU Start by Batteries
TASK 49-00-00-860-009-A	APU Shutdown by External Power (131-9(A))
TASK 49-00-00-860-009-A-01	APU Shutdown by Batteries (131-9(A))
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

3. Job Set-up
Subtask 36-12-00-941-056-A

A. Safety Precautions
(1) When you operate the air conditioning system, make sure that access door 811 is open (Ref. AMM TASK 52-41-00-010-002).
(2) Put a WARNING NOTICE(S) in position on access door 811 to tell persons not to close it.

Subtask 36-12-00-860-082-A

B. Aircraft Maintenance Configuration
(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 AIR COND overhead-panel 30VU:

Release the PACK 1 and PACK 2 pushbutton switch (the OFF legends come on).
Make sure that the X-bleed selector switch is in the AUTO position.

Subtask 36-12-00-865-071-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	APU/APU/CTL	2KD	L42
121VU	APU/ECB/SPLY	1KD	L41
122VU	AIR BLEED/X FEED VALVE/NORM	1HV	Z20

4. Procedure
Subtask 36-12-00-860-083-A

A. Pressurization of the Bleed System with the APU
(1) Start and operate the APU:

For an APS 3200 APU (Ref. AMM D/O 49-00-00-86)
For a 131-9(A) APU (Ref. AMM TASK 49-00-00-860-008).

NOTE: After the APU starts, Airbus recommends you to wait for a minimum of 3 minutes for the warm up period, before you select the APU BLEED.

(2) In the cockpit, on AIR COND overhead-panel 30VU:

Push the APU BLEED pushbutton-switch (the ON legend comes on).

(3) On the ECAM control panel, push the BLEED key (the BLEED page comes into view).
(4) On the AIR BLEED page of the lower-ECAM display unit:

Make sure that all the indications are normal (shown in green).

(5) When the pressurization of the bleed system is not necessary:
(a) In the cockpit, on AIR COND overhead-panel 30VU:

Push the APU BLEED pushbutton-switch to the released position (the ON legend goes off).

(b) Stop the APU:

For an APS 3200 APU (Ref. AMM D/O 49-00-00-86)
For a 131-9(A) APU (Ref. AMM TASK 49-00-00-860-009).

5. Close-up
Subtask 36-12-00-860-084-A

A. Aircraft Maintenance Configuration
(1) On AIR COND overhead-panel 30VU:

Push the PACK 1 and PACK 2 pushbutton switch (the OFF legends go off).
Make sure that the X-bleed selector switch is in the AUTO position.

(2) Do the EIS stop procedure (Upper ECAM DU and lower ECAM DU only) (Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 36-12-00-942-056-A

B. Put the aircraft back to its initial configuration.
(1) Remove the WARNING NOTICE(S).
(2) Close access door 811 (Ref. AMM TASK 52-41-00-410-002).

[Rev.10 from 2021] 2026.04.01 01:14:47 UTC