Removal of the Electric Pump

TASK 29-24-51-000-001-A
Removal of the Electric Pump

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

ZONE: 196
FIN: 3075GX

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	CAP - BLANKING
No specific	1	CONTAINER - HYDRAULIC FLUID RESISTANT
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	3	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
196	HYDRAULIC COMPT AND FAIRINGS
196BB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
Yellow Electric Pump
Yellow Electric Pump ** ON A/C NOT FOR ALL
Yellow Electric Pump ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 29-24-51-865-050-A

A. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 29-24-51-860-050-A

B. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system

In the cockpit on the hydraulic section 40VU of the overhead panel
On the ground service panels of the Green and Yellow system.

(3) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(4) Depressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(5) Open the access door 196BB.
(6) Put a CONTAINER - HYDRAULIC FLUID RESISTANT below the electric pump (3).
(7) Disconnect the isolation coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).

4. Procedure
Subtask 29-24-51-020-051-B

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.

A. Removal of the Electric Pump

NOTE: It is necessary for a second person to hold the pump (3) while you remove the nuts (10) and disconnect the electrical connector (14). The pump weighs approximately 15 kg (33 lb.).

NOTE: The pump (3) and the attachment bracket (12) are a matched assembly. Always replace the pump and the attachment bracket as an assembly.

(1) Cut and discard the lockwire and disconnect the electrical connector (14) from the pump (3).
(2) Remove the clamp (4) and disconnect the air hose (5) from the pump (3).
(3) Loosen the union nut and disconnect the suction pipe (1) from the pump (3).
(4) Put the PLUG-BLANKING in each disconnected line end.
(5) Loosen the union nut and disconnect the case drain pipe (6) from the pump (3).
(6) Put the PLUG-BLANKING in each disconnected line end.
(7) Loosen the union nut and disconnect the pressure pipe (19) from the pump (3).
(8) Put the PLUG-BLANKING in each disconnected line end.
(9) Loosen the union nut and disconnect the seal drain pipe (16) from the pump (3).
(10) If necessary, remove the unions:
(a) Remove the unions (2), (7) and (18) from the pump (3).
(b) Remove and discard the packings (28), (29) and (30).
(11) Put the CAP - BLANKING in the open union/ports of the pump (3).
(12) Remove and discard the four nuts (10).

NOTE: If new nuts (10) are not available, you can keep them, but do not use them more than three times.

(13) Disconnect the bonding lead:

CAUTION: MAKE SURE THAT THE ELECTRICAL CONNECTOR(S) IS(ARE) DISCONNECTED BEFORE YOU DISCONNECT THE BONDING STRAP(S).

(a) Remove the bolts (15) and disconnect the bonding lead (13).
(14) Remove the pump (3) from the aircraft.
(15) Put the CAP - BLANKING on the electrical connector and the electrical receptacle of the pump (3).

[Rev.10 from 2021] 2026.04.01 00:27:05 UTC