Installation of the Engine-Pump Pressure Switch

TASK 29-11-17-400-802-A
Installation of the Engine-Pump Pressure Switch

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: OBEY THE HYDRAULIC SAFETY PROCEDURES.

WARNING: DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

CAUTION: DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

ZONE: 470
FIN: 1074GK ** ON A/C NOT FOR ALL

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	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	1	CONTAINER 20L (5 USGAL)
No specific	1	PLIERS - JAWED, SOFT
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - CROWFOOT
No specific	Torque wrench: range to between 124.3 and 101.7 m.N (91.67 and 75.00 lbf.ft )
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
470	ENGINE 1 AFT PYLON
195BB, 197CB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
3	PACKING	AIPC 29-11-17-50-030

E. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 27-00-00-080-002-A	Removal of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 27-50-00-866-009-A	Retraction of the Flaps on the Ground
TASK 27-50-00-866-009-A-01	Retraction of the Flaps/Slats on the Ground
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-11-00-710-001-A	Operational Test of the Green Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 54-54-00-000-802-A	Removal of the Rear Pylon Fairing (RPF)
TASK 54-54-00-400-802-A	Installation of the Rear Pylon Fairing (RPF)
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
Engine-Pump Pressure Switch

3. Job Set-up
Subtask 29-11-17-860-066-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Green hydraulic system is depressurized
(Ref. AMM TASK 29-10-00-864-001)
(2) Make sure that the reservoir of the Green hydraulic system is depressurized
(Ref. AMM TASK 29-14-00-614-001)
(3) Make sure that the flaps are in the fully retracted position (Ref. AMM TASK 27-50-00-866-009).

Subtask 29-11-17-941-061-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On AIR COND panel 30VU:

Make sure that the APU BLEED pushbutton switch is released (ON legend off).
Make sure that a WARNING NOTICE(S) is in position to tell persons not to operate this pushbutton switch.

(2) Make sure that a WARNING NOTICE(S) is in position to tell persons not to pressurize the Green hydraulic system:

On the HYD section of panel 40VU
On the ground service panel of the Green hydraulic system.

(3) Make sure that a WARNING NOTICE(S) is in position on access door 195BB to tell persons not to pressurize the reservoir of the Green hydraulic system.
(4) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(5) On FLAPS panel 114VU:

Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is in position on the flap/slat control lever (Ref. AMM TASK 27-00-00-480-002).
Make sure that a WARNING NOTICE(S) is in position on the flap/slat control lever to tell persons not to operate the flap/slat controls.

Subtask 29-11-17-865-066-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 29-11-17-020-061-A ** ON A/C NOT FOR ALL

D. Make sure that the rear pylon fairing is removed (Ref. AMM TASK 54-54-00-000-802).

Subtask 29-11-17-010-062-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Make sure that an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position at the rear pylon.

Subtask 29-11-17-941-062-A ** ON A/C NOT FOR ALL

F. Preparation for Installation
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Do an inspection of the component interfaces and the adjacent area.

4. Procedure
Subtask 29-11-17-420-057-A ** ON A/C NOT FOR ALL

A. Installation of the Engine-Pump Pressure Switch
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the CONTAINER 20L (5 USGAL) is in position below the pressure switch (2).
(4) Remove the CAP - BLANKING from the pressure switch (2) and from the pressure-switch port of the manifold (4).
(5) Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) on the new AIPC 29-11-17-50-030 PACKING (3) and on the threads of the pressure switch (2).
(6) Install the new packing (3) on the pressure switch (2).
(7) Install the pressure switch (2) on the manifold (4).
(8) At the pressure-switch port of the manifold (4), install the WRENCH - CROWFOOT on the flats to hold the manifold (4).
(9) TORQUE the pressure switch (2) to between 124.3 and 101.7 m.N (91.67 and 75.00 lbf.ft )

.
(10) Remove the CAP - BLANKING from the electrical connector (1).
(11) Connect the electrical connector (1) to the pressure switch (2) and tighten it with the PLIERS - JAWED, SOFT.

Subtask 29-11-17-420-057-B ** ON A/C NOT FOR ALL

CAUTION: DO NOT USE HIGH-DENSITY FLUID SKYDROL 500B-4 FOR A320NEO FAMILY. THE FLUID CAN CAUSE DAMAGE TO THE HYDRAULIC SYSTEM COMPONENTS.

(5) Apply the Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) on the new AIPC 29-11-17-50-030 PACKING (3) and on the threads of the pressure switch (2).
(6) Install the new packing (3) on the pressure switch (2).
(7) Install the pressure switch (2) on the manifold (4).
(8) At the pressure-switch port of the manifold (4), install the WRENCH - CROWFOOT on the flats to hold the manifold (4).
(9) TORQUE the pressure switch (2) to between 124.3 and 101.7 m.N (91.67 and 75.00 lbf.ft )

.
(10) Remove the CAP - BLANKING from the electrical connector (1).
(11) Connect the electrical connector (1) to the pressure switch (2) and tighten it with the PLIERS - JAWED, SOFT.

Subtask 29-11-17-865-067-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 29-11-17-710-055-A ** ON A/C NOT FOR ALL

C. Operational Test
(1) Do the operational test of the Green hydraulic system (Ref. AMM TASK 29-11-00-710-001).
(2) After the dry-motoring, make sure that there were no leaks from the pressure switch (2).
(3) Make sure that the level of the hydraulic fluid in the Green reservoir is correct. If necessary, fill the reservoir (Ref. AMM TASK 12-12-29-611-001).

5. Close-up
Subtask 29-11-17-020-062-A ** ON A/C NOT FOR ALL

A. Install the rear pylon fairing (Ref. AMM TASK 54-54-00-400-802).

Subtask 29-11-17-410-055-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Close access doors 197CB and 195BB.
(2) Remove the container.
(3) Make sure that the work area is clean and clear of tools and other items.
(4) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever (Ref. AMM TASK 27-00-00-080-002).
(5) Remove the WARNING NOTICE(S).
(6) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.01 00:14:41 UTC