Change of the Hydraulic Fluid in the Blue Hydraulic System - with Ground Cart Available

TASK 12-36-29-600-003-A
Change of the Hydraulic Fluid in the Blue Hydraulic System - with Ground Cart Available

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 GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:

FLUSH IT AWAY WITH CLEAN WATER
GET MEDICAL AID.

1. Reason for the Job
To change the type of hydraulic fluid or to change the hydraulic fluid if the contamination is out of tolerance.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT)
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	1	CAP - BLANKING
No specific	1	CONTAINER 150L (40 USGAL)
No specific	1	GROUND POWER CART-HYDRAULIC
No specific	1	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)
No specific	Torque wrench: range to between 19.0 and 17.9 m.daN (140.12 and 132.01 lbf.ft )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
195BB, 197EB, 197FB

C. 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 12-32-29-281-001-A	Analyze Hydraulic Fluid
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 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-680-003-A	Drainage of the Reservoir of the Blue Hydraulic System
TASK 29-10-00-863-003-A	Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-863-003-A-01	Pressurize the Blue Hydraulic System with the Blue Electric Pump
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
Change of the Hydraulic Fluid in the Blue Hydraulic System - Schematic

3. Job Set-up
Subtask 12-36-29-860-107-A

A. Safety Precautions
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Put the WARNING NOTICE(S) and SAFETY BARRIER(S) in position.

Subtask 12-36-29-865-054-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/HYD PWR/B WARN/& CTL	2702GJ	C12
** 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/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C ALL
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33
** ON A/C ALL
123VU	B HYD/ELEC PUMP	2701GJ	AB09
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 12-36-29-010-075-A

C. Get Access
(1) Open access door 197EB.
(2) Open access panel 195BB.
(3) Open the left or the right MLG door (Ref. AMM TASK 32-12-00-010-001).
(4) Put the ACCESS PLATFORM 2M (6 FT) below Zone 195.
(5) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below the MLG bay.

Subtask 12-36-29-680-052-A

D. Drain the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-10-00-680-003).

Subtask 12-36-29-860-105-A

E. Preparation for the Fluid Change

Change of the Hydraulic Fluid in the Blue Hydraulic System - Schematic

CAUTION: MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE GROUND HYDRAULIC CART ARE SET TO A MINIMUM.

(1) Connect the pressure hose of the GROUND POWER CART-HYDRAULIC (filled with new hydraulic fluid) to delivery connector 2008GM at the ground service panel.
(2) Connect the return hose of the auxiliary hydraulic reservoir with the CONTAINER 150L (40 USGAL) to suction connector 2006GM at the ground service panel.

NOTE: The auxiliary hydraulic reservoir must have a contents gage.

4. Procedure
Subtask 12-36-29-611-063-A ** ON A/C NOT FOR ALL

A. Fluid Change Procedure without the Suction Line of the Blue Electric Pump (Ref. detail A)

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.

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Operate the hydraulic power cart.

NOTE: Increase the rate of flow and the pressure as necessary.

(3) In the cockpit, operate the flight controls.

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.

(a) On panel 11VU, move the GND SPLRS ARMED lever to the FULL position and then to the RET position. Do this step 3 times.

NOTE: The spoilers 3 LH and RH operate.

(b) On panel 18VU or 19VU, move the side stick fully to the left and then fully to the right. Do this step 3 times.

NOTE: The ailerons and spoilers 3 LH and RH operate.

NOTE: The elevators operate.

(d) At the captain or first officer position, push the LH pedal fully forward and then the RH pedal fully forward. Do this step 3 times.

NOTE: The rudder operates.

(e) On panel 114VU, move the flap/slat lever to the FULL position and then to the 0 deg position.

NOTE: The slats operate.

(4) Stop the hydraulic power cart.
(5) On panel 50VU in the cockpit, lift the guard and push the HYD/LEAK MEASUREMENT VALVES/B P/BSW (the OFF light comes on).
(6) Make sure that the manual selector valves on leakage measurement selector-valve 2146GM (in the MLG bay) are in the OFF position.
(7) Disconnect the return hose of the auxiliary hydraulic reservoir from suction connector 2006GM at the ground service panel.
(8) Disconnect the pressure hose of the hydraulic power cart from delivery connector 2008GM at the ground service panel.

Subtask 12-36-29-611-063-B ** ON A/C NOT FOR ALL

A. Fluid Change Procedure without the Suction Line of the Blue Electric Pump (Ref. detail A)

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.

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Operate the hydraulic power cart.
(3) Increase the rate of flow and the pressure as necessary.
(4) In the cockpit, operate the flight controls.

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.

(a) On panel 11VU, move the GND SPLRS ARMED lever to the FULL position and then to the RET position. Do this step 3 times.

NOTE: The spoilers 3 LH and RH operate.

(b) On panel 18VU or 19VU, move the side stick fully to the left and then fully to the right. Do this step 3 times.

NOTE: The ailerons and spoilers 3 LH and RH operate.

NOTE: The elevators operate.

(d) At the captain or first officer position, push the LH pedal fully forward and then the RH pedal fully forward. Do this step 3 times.

NOTE: The rudder operates.

(e) On panel 114VU, move the flap/slat lever to the FULL position and then to the 0 deg position.

NOTE: The slats operate.

(5) Stop the hydraulic power cart.
(6) On panel 50VU in the cockpit, lift the guard and push the HYD/LEAK MEASUREMENT VALVES/B P/BSW (the OFF light comes on).
(7) Disconnect the return hose of the auxiliary hydraulic reservoir from suction connector 2006GM at the ground service panel.
(8) Disconnect the pressure hose of the hydraulic power cart from delivery connector 2008GM at the ground service panel.

Subtask 12-36-29-611-062-B

CAUTION: MAKE SURE THAT THE FLOW RATE AND THE SUPPLY PRESSURE ON THE GROUND HYDRAULIC CART ARE SET TO A MINIMUM.

CAUTION: DO NOT LET THE HYDRAULIC FLUID IN THE GROUND POWER CART DECREASE BELOW THE LOW LEVEL. DO NOT LET THE AUXILIARY HYDRAULIC RESERVOIR BECOME TOO FULL.

B. Fluid Change Procedure of the Suction Line of the Blue Electric Pump (Ref. detail B)

NOTE: Make sure that the supply pressure of the ground hydraulic cart does not become more than 50 psi (3.4474 bar).

(1) Depressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-001).

NOTE: Be careful when you disconnect the hydraulic connections:
A large quantity of hydraulic fluid comes out of the line end fittings.

(2) Disconnect the upper end of the suction line (2457GM).
(3) Put a CAP - BLANKING on the fitting.
(4) Put the open line end in the auxiliary hydraulic reservoir.
(5) Connect the pressure hose of the hydraulic power cart to the suction connector (2006GM) at the ground service panel.
(a) Use the adapter P/N AE94186P (Aircraft suction port) and the adapter P/N AE80531K (Cart delivery) to make a connection.
(6) Adjust the supply pressure on the hydraulic power cart slowly from 0 to 50 psi (3.4474 bar) maximum.
(7) Stop the hydraulic power cart after a minimum of 20.0 l (5.2834 USgal) hydraulic fluid has come out of the suction line (2457GM).
(8) Remove the line end from the auxiliary hydraulic reservoir.
(9) Remove the blanking cap from the fitting and connect the suction line (2457GM).
(10) TORQUE the line end fitting to between 19.0 and 17.9 m.daN (140.12 and 132.01 lbf.ft )

.
(11) Disconnect the pressure hose of the hydraulic power cart from the suction connector (2006GM) at the ground service panel.

5. Close-up
Subtask 12-36-29-860-106-A

A. Put the aircraft back to the serviceable condition.
(1) Fill the reservoir of the Blue hydraulic system (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(2) Pressurize the reservoir of the Blue hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(3) Pressurize the Blue Hydraulic system with the ground cart (Ref. AMM TASK 29-10-00-863-003).
(4) On panel 50VU in the cockpit, push the HYD/LEAK MEASUREMENT VALVES/B P/BSW (the OFF light goes off).
(5) Operate the related hydraulic systems to remove the air.
(6) Depressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).
(7) Make sure that the reservoir of the Blue hydraulic system is correctly filled with new fluid (Ref. AMM TASK 12-12-29-611-001).
(8) Remove the container.
(9) Remove the access platform(s).

Subtask 12-36-29-410-064-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access door 197FB.
(3) Close access panel 195BB.
(4) Close the applicable MLG door (Ref. AMM TASK 32-12-00-410-001).

Subtask 12-36-29-865-055-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	HYD/HYD PWR/B WARN/& CTL	2702GJ	C12
** 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/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C ALL
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33
** ON A/C ALL
123VU	B HYD/ELEC PUMP	2701GJ	AB09
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 12-36-29-860-108-A

D. Put the aircraft back to the serviceable condition.
(1) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(3) Do the fluid sampling of the applicable hydraulic system (Ref. AMM TASK 12-32-29-281-001).

NOTE: Each contamination (acid number, water content and other contaminations) has a different requirements for the fluid sampling time.

[Rev.10 from 2021] 2026.03.31 22:58:42 UTC