Operational Check of EDP Depressurization

TASK 29-10-00-710-004-A
Operational Check of EDP Depressurization

ZONE: 210

1. Reason for the Job
Refer to the MPD TASK: 291000-20
OPERATIONAL CHECK OF EDP DEPESSURIZATION
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

B. 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 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 29-14-00-614-002-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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 71-00-00-710-001-A	Dry Motoring Check
TASK 71-00-00-710-001-B	Dry Motoring Check
TASK 71-00-00-710-045-A	Test No.1 : Dry Motor Leak Check
TASK 71-00-00-860-817-A	Motor the Engine (Dry Method)

3. Job Set-up
Subtask 29-10-00-865-106-A

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

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/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** ON A/C ALL
121VU	HYDRAULIC/SOL VALVES/G/Y/PTU	1801GL	N34
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/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 29-10-00-860-118-A

B. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(3) On the ECAM control panel on the center pedestal, press the HYD pushbutton. Make sure that the HYD page is shown on the ECAM lower Display Unit (DU)
(4) Make sure that the ECAM does not show these conditions:

Low air pressure in the Green and Yellow reservoir
Low fluid level in the Green and Yellow reservoir.

(5) If necessary, pressurize the reservoir (Ref. AMM TASK 29-14-00-614-002).
(6) If necessary, add fluid to the reservoir (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(7) On the overhead panel 40VU, press the PTU/AUTO P/BSW (the OFF light comes on).
(8) On the overhead panel 40VU, make sure that the GREEN/ENG 1 PUMP and the YELLOW/ENG 2 PUMP P/BSWs are set to on (FAULT and OFF lights are off).

4. Procedure
Subtask 29-10-00-710-058-A ** ON A/C NOT FOR ALL

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 START OR DRY MOTOR THE ENGINES WITH A HYDRAULIC GROUND POWER SUPPLY CONNECTED TO THE AIRCRAFT. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE ENGINE PUMPS.

A. Operational Check of EDP Depressurization

ACTION	RESULT
1.Dry-motor the left (No. 1) engine (Ref. AMM TASK 71-00-00-710-001).	The left (No. 1) engine turns and causes the engine-driven pump of the Green hydraulic system to turn.
	On the ECAM upper DU: The speed of the left (No. 1) engine is approximately 20% N2.
	On the ECAM lower DU: The pressure in the Green hydraulic system is 3000 +100 -100 psi.
2.On the overhead panel 40VU: Press the GREEN/ENG 1 PUMP P/BSW.	On the overhead panel 40VU: The GREEN/ENG 1 PUMP OFF light comes on.
	On the ECAM lower DU: The vertical line between the EDP box and the system indication changes from green to amber The engine pump symbol of the Green hydraulic system changes from green in-line to amber cross-line The pressure in the Green hydraulic system decreases to 0 psi.
3.On the overhead panel 40VU: Press the GREEN/ENG 1 PUMP P/BSW.	On the overhead panel 40VU: The GREEN/ENG 1 PUMP OFF light goes off.
	On the ECAM lower DU: The pressure in the Green hydraulic system increases to 3000 +100 -100 psi The engine pump symbol of the Green hydraulic system changes from amber cross-line to green in-line The vertical line between the EDP box and the system indication changes from amber to green.
4.Stop the dry-motoring of the left (No. 1) engine (Ref. AMM TASK 71-00-00-710-001).	On the ECAM lower DU: The pressure in the Green hydraulic system decreases to 0 psi.
5.Dry-motor the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-001).	The right (No. 2) engine turns and causes the engine-driven pump of the Yellow hydraulic system to turn.
	On the ECAM upper DU: The speed of the right (No. 2) engine is approximately 20% N2.
	On the ECAM lower DU: The pressure in the Yellow hydraulic system is 3000 +100 -100 psi.
6.On the overhead panel 40VU: Press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: The YELLOW/ENG 2 PUMP OFF light comes on.
	On the ECAM lower DU: The vertical line between the EDP box and the system indication changes from green to amber The engine pump symbol of the Yellow hydraulic system changes from green in-line to amber cross-line The pressure in the Yellow hydraulic system decreases to 0 psi.
7.On the overhead panel 40VU: Press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: The YELLOW/ENG 2 PUMP OFF light goes off.
	On the ECAM lower DU: The pressure in the Yellow hydraulic system increases to 3000 +100 -100 psi The engine pump symbol of the Yellow hydraulic system changes from amber cross-line to green in-line The vertical line between the EDP box and the system indication changes from amber to green.
8.Stop the dry-motoring of the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-001).	On the ECAM lower DU: The pressure in the Yellow hydraulic system decreases to 0 psi.

Subtask 29-10-00-710-058-B ** ON A/C NOT FOR ALL

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 START OR DRY MOTOR THE ENGINES WITH A HYDRAULIC GROUND POWER SUPPLY CONNECTED TO THE AIRCRAFT. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE ENGINE PUMPS.

A. Operational Check of EDP Depressurization

ACTION	RESULT
1.Dry-motor the left (No. 1) engine (Ref. AMM TASK 71-00-00-710-001).	The left (No. 1) engine turns and causes the engine-driven pump of the Green hydraulic system to turn.
	On the ECAM upper DU: The speed of the left (No. 1) engine is approximately 20% N2.
	On the ECAM lower DU: The pressure in the Green hydraulic system is 3000 +100 -100 psi.
2.On the overhead panel 40VU: Press the GREEN/ENG 1 PUMP P/BSW.	On the overhead panel 40VU: The GREEN/ENG 1 PUMP OFF light comes on.
	On the ECAM lower DU: The vertical line between the EDP box and the system indication changes from green to amber The engine pump symbol of the Green hydraulic system changes from green in-line to amber cross-line The pressure in the Green hydraulic system decreases to 0 psi.
3.On the overhead panel 40VU: Press the GREEN/ENG 1 PUMP P/BSW.	On the overhead panel 40VU: The GREEN/ENG 1 PUMP OFF light goes off.
	On the ECAM lower DU: The pressure in the Green hydraulic system increases to 3000 +100 -100 psi The engine pump symbol of the Green hydraulic system changes from amber cross-line to green in-line The vertical line between the EDP box and the system indication changes from amber to green.
4.Stop the dry-motoring of the left (No. 1) engine (Ref. AMM TASK 71-00-00-710-001).	On the ECAM lower DU: The pressure in the Green hydraulic system decreases to 0 psi.
5.Dry-motor the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-001).	The right (No. 2) engine turns and causes the engine-driven pump of the Yellow hydraulic system to turn.
	On the ECAM upper DU: The speed of the right (No. 2) engine is approximately 20% N2.
	On the ECAM lower DU: The pressure in the Yellow hydraulic system is 3000 +100 -100 psi.
6.On the overhead panel 40VU: Press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: The YELLOW/ENG 2 PUMP OFF light comes on.
	On the ECAM lower DU: The vertical line between the EDP box and the system indication changes from green to amber The engine pump symbol of the Yellow hydraulic system changes from green in-line to amber cross-line The pressure in the Yellow hydraulic system decreases to 0 psi.
7.On the overhead panel 40VU: Press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: The YELLOW/ENG 2 PUMP OFF light goes off.
	On the ECAM lower DU: The pressure in the Yellow hydraulic system increases to 3000 +100 -100 psi The engine pump symbol of the Yellow hydraulic system changes from amber cross-line to green in-line The vertical line between the EDP box and the system indication changes from amber to green.
8.Stop the dry-motoring of the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-001).	On the ECAM lower DU: The pressure in the Yellow hydraulic system decreases to 0 psi.

Subtask 29-10-00-710-058-C ** ON A/C NOT FOR ALL

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 START OR DRY MOTOR THE ENGINES WITH A HYDRAULIC GROUND POWER SUPPLY CONNECTED TO THE AIRCRAFT. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE ENGINE PUMPS.

A. Operational Check of EDP Depressurization

ACTION	RESULT
1.Dry-motor the left (No. 1) engine (Ref. AMM TASK 71-00-00-710-045).	The left (No. 1) engine turns and causes the engine-driven pump of the Green hydraulic system to turn.
	On the ECAM upper DU: The speed of the left (No. 1) engine is approximately 20% N2.
	On the ECAM lower DU: The pressure in the Green hydraulic system is 3000 +100 -100 psi.
2.On the overhead panel 40VU: Press the GREEN/ENG 1 PUMP P/BSW.	On the overhead panel 40VU: The GREEN/ENG 1 PUMP OFF light comes on.
	On the ECAM lower DU: The vertical line between the EDP box and the system indication changes from green to amber The engine pump symbol of the Green hydraulic system changes from green in-line to amber cross-line The pressure in the Green hydraulic system decreases to 0 psi.
3.On the overhead panel 40VU: Press the GREEN/ENG 1 PUMP P/BSW.	On the overhead panel 40VU: The GREEN/ENG 1 PUMP OFF light goes off.
	On the ECAM lower DU: The pressure in the Green hydraulic system increases to 3000 +100 -100 psi The engine pump symbol of the Green hydraulic system changes from amber cross-line to green in-line The vertical line between the EDP box and the system indication changes from amber to green.
4.Stop the dry-motoring of the left (No. 1) engine (Ref. AMM TASK 71-00-00-710-045).	On the ECAM lower DU: The pressure in the Green hydraulic system decreases to 0 psi.
5.Dry-motor the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-045).	The right (No. 2) engine turns and causes the engine-driven pump of the Yellow hydraulic system to turn.
	On the ECAM upper DU: The speed of the right (No. 2) engine is approximately 20% N2.
	On the ECAM lower DU: The pressure in the Yellow hydraulic system is 3000 +100 -100 psi.
6.On the overhead panel 40VU: Press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: The YELLOW/ENG 2 PUMP OFF light comes on.
	On the ECAM lower DU: The vertical line between the EDP box and the system indication changes from green to amber The engine pump symbol of the Yellow hydraulic system changes from green in-line to amber cross-line The pressure in the Yellow hydraulic system decreases to 0 psi.
7.On the overhead panel 40VU: Press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: The YELLOW/ENG 2 PUMP OFF light goes off.
	On the ECAM lower DU: The pressure in the Yellow hydraulic system increases to 3000 +100 -100 psi The engine pump symbol of the Yellow hydraulic system changes from amber cross-line to green in-line The vertical line between the EDP box and the system indication changes from amber to green.
8.Stop the dry-motoring of the right (No. 2) engine (Ref. AMM TASK 71-00-00-710-045).	On the ECAM lower DU: The pressure in the Yellow hydraulic system decreases to 0 psi.

Subtask 29-10-00-710-058-D ** ON A/C NOT FOR ALL

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 START OR DRY MOTOR THE ENGINES WITH A HYDRAULIC GROUND POWER SUPPLY CONNECTED TO THE AIRCRAFT. IF YOU DO, YOU CAN CAUSE DAMAGE TO THE ENGINE PUMPS.

A. Operational Check of EDP Depressurization

ACTION	RESULT
1.Dry-motor the left (No. 1) engine (Ref. AMM TASK 71-00-00-860-817).	The left (No. 1) engine turns and causes the engine-driven pump of the Green hydraulic system to turn.
	On the ECAM upper DU: The speed of the left (No. 1) engine is approximately 20% N2.
	On the ECAM lower DU: The pressure in the Green hydraulic system is 3000 +100 -100 psi.
2.On the overhead panel 40VU: Press the GREEN/ENG 1 PUMP P/BSW.	On the overhead panel 40VU: The GREEN/ENG 1 PUMP OFF light comes on.
	On the ECAM lower DU: The vertical line between the EDP box and the system indication changes from green to amber The engine pump symbol of the Green hydraulic system changes from green in-line to amber cross-line The pressure in the Green hydraulic system decreases to 0 psi.
3.On the overhead panel 40VU: Press the GREEN/ENG 1 PUMP P/BSW.	On the overhead panel 40VU: The GREEN/ENG 1 PUMP OFF light goes off.
	On the ECAM lower DU: The pressure in the Green hydraulic system increases to 3000 +100 -100 psi The engine pump symbol of the Green hydraulic system changes from amber cross-line to green in-line The vertical line between the EDP box and the system indication changes from amber to green.
4.Stop the dry-motoring of the left (No. 1) engine (Ref. AMM TASK 71-00-00-860-817).	On the ECAM lower DU: The pressure in the Green hydraulic system decreases to 0 psi.
5.Dry-motor the right (No. 2) engine (Ref. AMM TASK 71-00-00-860-817).	The right (No. 2) engine turns and causes the engine-driven pump of the Yellow hydraulic system to turn.
	On the ECAM upper DU: The speed of the right (No. 2) engine is approximately 20% N2.
	On the ECAM lower DU: The pressure in the Yellow hydraulic system is 3000 +100 -100 psi.
6.On the overhead panel 40VU: Press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: The YELLOW/ENG 2 PUMP OFF light comes on.
	On the ECAM lower DU: The vertical line between the EDP box and the system indication changes from green to amber The engine pump symbol of the Yellow hydraulic system changes from green in-line to amber cross-line The pressure in the Yellow hydraulic system decreases to 0 psi.
7.On the overhead panel 40VU: Press the YELLOW/ENG 2 PUMP P/BSW.	On the overhead panel 40VU: The YELLOW/ENG 2 PUMP OFF light goes off.
	On the ECAM lower DU: The pressure in the Yellow hydraulic system increases to 3000 +100 -100 psi The engine pump symbol of the Yellow hydraulic system changes from amber cross-line to green in-line The vertical line between the EDP box and the system indication changes from amber to green.
8.Stop the dry-motoring of the right (No. 2) engine (Ref. AMM TASK 71-00-00-860-817).	On the ECAM lower DU: The pressure in the Yellow hydraulic system decreases to 0 psi.

5. Close-up
Subtask 29-10-00-860-119-A

A. Put the aircraft back to the serviceable condition.
(1) On the overhead panel 40VU, press and release the PTU/AUTO P/BSW (the OFF light goes off).
(2) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 08:00:53 UTC