Pressurization of the Bleed System through the HP Ground Connector

TASK 36-12-00-860-806-A
Pressurization of the Bleed System through the HP Ground Connector

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.

CAUTION: MAKE SURE THAT THE GROUND AIR-SUPPLY UNIT IS NOT TOO NEAR THE AIRCRAFT AND THAT THE ENGINE EXHAUST PIPE OF THE GROUND AIR- SUPPLY UNIT POINTS AWAY FROM THE AIRCRAFT. HEAT FROM THIS UNIT AND FROM THE EXHAUST CAN CAUSE DAMAGE TO THE AIRCRAFT STRUCTURE.

CAUTION: MAKE SURE THAT THE GROUND-AIR SUPPLY IS FREE FROM OIL CONTAMINATION. OIL CONTAMINATION CAN CAUSE THE SMELL OF OIL IN THE CABIN AND MAKE THE AIR-CONDITIONING PACKS UNSERVICEABLE.

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	GROUND AIR-SUPPLY UNIT(HIGH PRESSURE)
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
191DB, 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 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 36-12-00-941-057-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 36-12-00-860-085-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 switches (the OFF legends come on).
Make sure that the X-bleed selector switch is in the AUTO position.

Subtask 36-12-00-865-072-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

Subtask 36-12-00-010-060-A

D. Get Access
(1) Open access door 191DB.
(2) Connect the GROUND AIR-SUPPLY UNIT(HIGH PRESSURE) to the aircraft HP ground-connector.

4. Procedure
Subtask 36-12-00-860-086-A

A. Pressurization of the Bleed System through the HP Ground Connector
(1) Start the ground air-supply unit and make sure that:

The airflow is between 54 kg.min (119.0496 lb.min) and 78 kg.min (171.9605 lb.min).
The supplied air pressure is not more than 60 psi (4.14 bar).
The supplied air temperature is not more than 260 deg.C (500.00 deg.F).

(2) On the ECAM control panel, push the BLEED key (the BLEED page comes into view).
(3) On the AIR BLEED page of the lower ECAM DU:

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

(4) When the pressurization of the bleed system is no longer necessary, stop the air supply.

5. Close-up
Subtask 36-12-00-410-060-A

A. Close Access
(1) Disconnect the GROUND AIR-SUPPLY UNIT(HIGH PRESSURE) from the aircraft HP ground-connector.
(2) Close access door 191DB.

Subtask 36-12-00-860-087-A

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

Push the PACK 1 and PACK 2 pushbutton switches (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 36-12-00-942-057-A

C. 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).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

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