Cleaning of the Engine Pump Solenoid-Valve

TASK 29-11-51-100-804-A
Cleaning of the Engine Pump Solenoid-Valve

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

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

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: 430

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	BLOWING EQUIPMENT - DRY AIR
No specific	1	CLEANING EQUIPMENT - ULTRASONIC
No specific	1	CONTAINER - HYDRAULIC FLUID RESISTANT
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.08BBD1)	Non Aqueous Cleaner-- Isopropyl Alcohol -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
430	ENG 1 AIR INTAKE, FAN AND ACCESS GEARBOX
195BB, 197CB
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 452AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-12-29-611-002-A	Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart
TASK 29-10-00-710-004-A	Operational Check of EDP Depressurization
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-11-51-000-806-A	Removal of the Solenoid Valve of the Green Engine Driven Pump
TASK 29-11-51-400-806-A	Installation of the Solenoid Valve of the Green Engine Driven Pump
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-30-00-200-001-A	Check of System Pressure Indication on the ECAM Display Unit
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Engine Pump Solenoid-Valve

3. Job Set-up
Subtask 29-11-51-860-079-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) Depressurize the reservoir of the Green hydraulic system
(Ref. AMM TASK 29-14-00-614-001)

Subtask 29-11-51-941-069-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).
Put a WARNING NOTICE(S) in position to tell persons not to operate this pushbutton switch.

(2) Open access door 197CB.
(a) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system on the ground service panel.
(3) On the HYD section of panel 40VU:

Put WARNING NOTICE(S) in position to tell persons not to pressurize the Green hydraulic system.

(4) Open access door 195BB:
(a) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the reservoir of the Green hydraulic system.
(5) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).

Subtask 29-11-51-865-074-A ** ON A/C NOT FOR ALL

C. Open, safety and tag 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 29-11-51-010-061-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR

Subtask 29-11-51-040-050-A ** ON A/C NOT FOR ALL

E. Deactivation of the Thrust Reverser for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 29-11-51-010-062-A ** ON A/C NOT FOR ALL

F. Get Access
(1) Open the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR

4. Procedure
Subtask 29-11-51-130-053-A ** ON A/C NOT FOR ALL

A. Cleaning of the Engine Pump Solenoid-Valve
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Put a CONTAINER - HYDRAULIC FLUID RESISTANT below the hydraulic connections of the engine pump to collect the remaining fluid.
(4) Remove the engine pump solenoid-valve (Ref. AMM TASK 29-11-51-000-806).
(5) Flush the bore.
(a) Flush the bore of the solenoid valve (1) many times with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) .
(6) Dry the bore of the solenoid valve (1) with clean BLOWING EQUIPMENT - DRY AIR.
(7) Ultrasonic cleaning
(a) Fill the CLEANING EQUIPMENT - ULTRASONIC with Non Aqueous Cleaner-- Isopropyl Alcohol - (Material No.08BBD1) to the level given in the manufacturer's handbook.
(b) Carefully put the solenoid valve into the basket, then put the basket fully into the liquid. Do not put the electrical connector into the liquid.
(c) Start the CLEANING EQUIPMENT - ULTRASONIC and let it operate for ten minutes.
(8) Dry all the solenoid valve components with the clean BLOWING EQUIPMENT - DRY AIR.
(9) Examine the components after the cleaning to make sure that the valve body (3) ports C, P and R and the valve spool (2) are clean.
(10) Install the engine pump solenoid-valve (Ref. AMM TASK 29-11-51-400-806).

Subtask 29-11-51-865-075-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 29-11-51-710-067-A ** ON A/C NOT FOR ALL

C. Test
(1) Do a check of the reservoir fluid level (Ref. AMM TASK 29-30-00-200-001) and fill the reservoir, if necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(2) Do the operational test of the engine pump depressurization (Ref. AMM TASK 29-10-00-710-004).
(a) Make sure that there is no leak from the solenoid valve interface.
(3) Do a check of the reservoir fluid level again (Ref. AMM TASK 29-30-00-200-001) and fill the reservoir, if necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).

5. Close-up
Subtask 29-11-51-410-062-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Remove the container.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the WARNING NOTICE(S).
(4) Close the right thrust-reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR

Subtask 29-11-51-440-050-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 29-11-51-410-061-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(2) Close access doors 197CB and 195BB.

[Rev.10 from 2021] 2026.04.01 00:18:33 UTC