Installation of the Blue Electric-Pump Supply Contactor

TASK 29-12-55-400-001-A
Installation of the Blue Electric-Pump Supply Contactor

WARNING: ISOLATE ALL THE AIRCRAFT ELECTRICAL CIRCUITS.

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

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT)
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BBB1)	Non Aqueous Cleaner-- Petroleum Based -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
121AL, 822

D. 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 29-12-00-710-001-A	Functional Check of Blue Electrical Pump Pressure by Reading ECAM Indication
Blue Electric-Pump Supply Contactor (2705GJ)

3. Job Set-up
Subtask 29-12-55-860-051-A

A. Aircraft Maintenance Configuration
(1) Make sure that the external power connector is not connected to the aircraft receptacle (20XG) (receptacle behind the access door 121AL).
(2) Make sure that the WARNING NOTICE(S) is (are) in position on the access door 121AL to tell persons not to connect the external power connector.
(3) In the cockpit, on the overhead panel 35VU, make sure that these pushbutton switches are released:

APU GEN,
1 BAT 2,
GEN1, GEN2,
EXT PWR.

(4) In the cockpit, make sure that the WARNING NOTICE(S) to tell persons not to operate the pushbutton switches is (are) in position on these overhead panels:

21VU (EMER ELEC PWR),
25VU (APU),
35VU (ELEC).

(5) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position at the access door 822.
(6) Make sure that the access door 822 is open.
(7) Make sure that the cover (1) of the panel 107 VU is removed.

4. Procedure
Subtask 29-12-55-420-050-A

A. Installation of the Contactor
(1) Install the contactor (2) on the 6 tapped barrels (7) of the contactor base (8).
(2) Install the washers (6) and the screws (5).
(3) Remove the blanking cap from the electrical connector (4).
(4) Examine the electrical connector (4) for dirt inside the connector. If the connector is dirty, clean it with a Textile-Lint free Cotton - (Material No.14SBA1) and Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(5) Connect the electrical connector (4) to the receptacle (3).

Subtask 29-12-55-860-052-A

B. Preparation for the Test
(1) In the cockpit, on the overhead panel 35VU:

push the APU GEN, GEN 1 and GEN 2 pushbutton switches.

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

Subtask 29-12-55-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
123VU	B HYD/ELEC PUMP	2701GJ	AB09

Subtask 29-12-55-710-050-A

D. Operational Test
(1) Do the operational test of the Blue electric pump (Ref. AMM TASK 29-12-00-710-001).

5. Close-up
Subtask 29-12-55-942-050-A

A. Put the aircraft back to its initial configuration
(1) Make sure that the work area is clean and clear of tools and other items.
(2) De-energize the electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 29-12-55-410-050-A

B. Close Access
(1) Install the cover (1) on the panel 107VU.
(2) Close the access door 822.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 00:19:46 UTC