W DOC AIRBUS | AMM A320F

Operational Check of PTU In-Flight Inhibition Logic

TASK 29-23-00-710-006-A
Operational Check of PTU In-Flight Inhibition Logic

CAUTION: ALWAYS OBEY THE PRECAUTIONS THAT FOLLOW TO KEEP ELECTRICAL WIRING IN A SATISFACTORY CONDITION (ELECTRICALLY AND MECHANICALLY SERVICEABLE). WHEN YOU DO MAINTENANCE WORK, REPAIRS OR MODIFICATIONS, ALWAYS KEEP ELECTRICAL WIRING, COMPONENTS AND THE WORK AREA AS CLEAN AS POSSIBLE. TO DO THIS:
  • PUT PROTECTION, SUCH AS PLASTIC SHEETING, CLOTHS, ETC. AS NECESSARY ON WIRING AND COMPONENTS.
  • REGULARLY REMOVE ALL SHAVINGS, UNWANTED MATERIAL AND OTHER CONTAMINATION
THESE PRECAUTIONS WILL DECREASE THE RISK OF CONTAMINATION AND DAMAGE TO THE ELECTRICAL WIRING INSTALLATION. IF THERE IS CONTAMINATION, REFER TO ESPM 20-55-00.
ZONE: 196
ZONE: 210
ZONE: 734
ZONE: 744
FIN: 1088GM
1. Reason for the Job
Refer to the MPD TASK: 291000-19
OPERATIONAL CHECK OF PTU IN-FLIGHT INHIBITION LOGIC
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
AR
SAFETY CLIP - CIRCUIT BREAKER
ALT29000001
1
HYD GRND PWR UNIT3000
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
196
HYDRAULIC COMPT AND FAIRINGS
210
CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
734
MAIN DOOR
744
MAIN DOOR
196BB
 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 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 29-10-00-863-001-A
Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-001-A
Depressurize the Green Hydraulic System
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 29-24-00-863-001-A
Pressurize the Yellow Hydraulic System with the Electric Pump
TASK 29-24-00-864-001-A
Depressurize the Yellow Hydraulic System
TASK 31-60-00-860-001-A
EIS Start Procedure
TASK 31-60-00-860-002-A
EIS Stop Procedure
TASK 32-00-00-860-001-A
Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01
Flight Configuration Precautions without Electrical Power
TASK 32-00-00-860-002-A
Ground Configuration after Flight Configuration with Electrical Power
TASK 32-00-00-860-002-A-01
Ground Configuration after Flight Configuration without Electrical Power
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
TASK 53-35-13-000-002-A
Removal of the Quick-Release Access Panels from the Belly Fairing Structure
TASK 53-35-13-400-002-A
Installation of the Quick-Release Access Panels on the Belly Fairing Structure
TASK 73-25-34-000-040-A
Removal of the Engine Interface Unit (EIU)
TASK 73-25-34-000-040-B
Removal of the Engine Interface Unit (EIU)
TASK 73-25-34-000-041-A
Removal of the Engine Interface Unit (EIU)
TASK 73-25-34-400-040-A
Installation of the Engine Interface Unit (EIU)
TASK 73-25-34-400-040-B
Installation of the Engine Interface Unit (EIU)
TASK 73-25-34-400-041-A
Installation of the Engine Interface Unit (EIU)
3. Job Set-up
Subtask 29-23-00-860-064-A
A. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
   (2) In the cockpit, make sure that the parking brake is in the OFF position.
   (3) At the Nose Landing Gear (NLG), make sure that the towing lever is not in the tow position.
   (4) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
   (5) On the ECAM control panel, push the HYD key. Make sure that the HYD page comes into view on the ECAM lower DU.
   (6) Make sure that the ECAM does not show the warnings that follow:
  • Low air pressure in the Green and Yellow hydraulic reservoirs
  • Low fluid level in the Green and Yellow hydraulic reservoirs.
   (7) If necessary, pressurize the applicable hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-002).
   (8) If necessary, add fluid to the applicable hydraulic reservoirs (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
Subtask 29-23-00-010-053-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open the main landing-gear doors (Ref. AMM TASK 32-12-00-010-001).
   (2) Open access panel 196BB (Ref. AMM TASK 53-35-13-000-002).
   (3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position to get access to the avionics compartment.
   (4) Do Flight Configuration Precautions with Electrical Power (Ref. AMM TASK 32-00-00-860-001).
   (5) Remove the Engine Interface Units (EIUs):
     (a) Remove the EIU (1KS1) (Ref. AMM TASK 73-25-34-000-040).
     (b) Remove the EIU (1KS2) (Ref. AMM TASK 73-25-34-000-040).
NOTE: Removal of the EIUs can cause a EIU fault message on the SD during the test. This is permitted.
Subtask 29-23-00-010-053-C ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open the main landing-gear doors (Ref. AMM TASK 32-12-00-010-001).
   (2) Open access panel 196BB (Ref. AMM TASK 53-35-13-000-002).
   (3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position to get access to the avionics compartment.
   (4) Do Flight Configuration Precautions with Electrical Power (Ref. AMM TASK 32-00-00-860-001).
Subtask 29-23-00-010-053-H ** ON A/C NOT FOR ALL
B. Get Access
   (1) Open the main landing-gear doors (Ref. AMM TASK 32-12-00-010-001).
   (2) Open access panel 196BB (Ref. AMM TASK 53-35-13-000-002).
   (3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position to get access to the avionics compartment.
   (4) Do Flight Configuration Precautions with Electrical Power (Ref. AMM TASK 32-00-00-860-001).
   (5) Remove the Engine Interface Units (EIUs):
     (a) Remove the EIU (1KS1) (Ref. AMM TASK 73-25-34-000-041).
     (b) Remove the EIU (1KS2) (Ref. AMM TASK 73-25-34-000-041).
NOTE: Removal of the EIUs can cause a EIU fault message on the SD during the test. This is permitted.
Subtask 29-23-00-865-062-A
C. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VULGCIU/BAT SPLY/SYS259GAR33
** ON A/C ALL
121VUHYDRAULIC/SOL VALVES/G/Y/PTU1801GLN34
121VUHYDRAULIC/Y HYD/PUMP ENG2/MONG3700GDQ37
121VUHYDRAULIC/LGCIU/SYS22GAQ35
** ON A/C NOT FOR ALL
121VULGCIU/BAT SPLY/SYS259GAR32
Subtask 29-23-00-865-064-A
D. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUHYD/HYD PWR/B WARN/& CTL2702GJC12
** ON A/C NOT FOR ALL
121VUPTU INHIT/Y SYS1808GLQ33
121VUPTU INHIT/G SYS1807GLQ32
** ON A/C NOT FOR ALL
121VUHYDRAULIC / PTU FLT INHIB1825GLQ31
** ON A/C NOT FOR ALL
121VUHYDRAULIC-PTU FLT INHIT1825GLQ32
** ON A/C ALL
123VUB HYD/ELEC PUMP2701GJAB09
4. Procedure
Subtask 29-23-00-710-055-B ** ON A/C NOT FOR ALL
A. Operational Check of PTU Inhibition Logic of the Yellow Hydraulic System

CAUTION :
WHEN A HYDRAULIC GROUND POWER-SUPPLY OR GROUND CART IS USED, ITS HYDRAULIC FLOW FUNCTION MUST BE LIMITED TO A MAXIMUM OF 50 LITERS PER MINUTE AT NOMINAL PRESSURE (3000 PSI). THIS WILL PREVENT DAMAGE TO THE PTU WHEN STARTING AT HIGH PRESSURE.
   (1) Use the ALT29000001 HYD GRND PWR UNIT3000 and do the test that follows:
ACTION
RESULT
1.On panel 85VU:
  • On connector 1KS1-A, use a shunt to connect pins AB9E and AB10J together.

2.On panel 86VU:
  • On connector 1KS2-A, use a shunt to connect pins AB9E and AB10J together.

3.On panel 121VU:
  • Open circuit breakers 2GA and 59GA.
NOTE: Intermittent illumination of the PTU FAULT light can occur during this test and is permitted. Also FAULT messages shown for less than two seconds can be ignored.
THE FAULT starts continuous less than 2 seconds are thought as temporary.
  • In flight condition with aircraft on ground is simulated.
4.Do a check of the Yellow hydraulic system:
On the ECAM lower DU:
  • Check that the PTU pressurizes the Yellow hydraulic system.
5.On panel 121VU:
  • Close circuit breakers 1807GL and 1808GL.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Yellow hydraulic system.
6.On the HP manifold of the Yellow hydraulic system:
  • Disconnect system pressure-switch electrical-connector 3151GN-A
  • Use a shunt to connect pins A and C of the connector together to simulate low pressure condition for more than 6 seconds.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Yellow hydraulic system.
7.On the HP manifold of the Yellow hydraulic system:
  • Remove the shunt between pins A and C of the system pressure-switch electrical-connector 3151GN-A
  • Connect the system pressure-switch electrical connector 3151GN-A.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Yellow hydraulic system.
8.On the HP manifold of the Yellow hydraulic system:
  • Disconnect the flight control-pressure electrical connector 10CE3-A
  • Use a shunt to connect pins A and C of the connector together to simulate low pressure condition for more than 6 seconds.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Yellow hydraulic system.
9.On the HP manifold of the Yellow hydraulic system:
  • Disconnect the system pressure-switch electrical connector 3151GN-A
  • Use a shunt to connect pins A and C of the connector together.
On the panel 40VU:
  • The fault legend of the PTU P/BSW comes ON.
10.After a minimum of 6 seconds.
On the ECAM lower DU:
  • Check that the PTU stops automatically.
11.On panel 121VU:
  • Close circuit breakers 2GA and 59GA.
Simulated in flight condition with aircraft on ground is stopped.
12.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Yellow hydraulic system.

On panel 40VU:
  • The fault legend of the PTU P/BSW stays ON.
13.On panel 121VU:
  • Open circuit breakers 2GA and 59GA.
  • In flight condition with aircraft on ground is simulated.
14.After a minimum of 6 seconds.
On panel 40VU:
  • The fault legend of the PTU P/BSW stays ON.

On the ECAM lower DU:
  • Check that the PTU stops automatically.
15.On the HP manifold of the Yellow hydraulic system:
  • Remove the shunt between pins A and C of system pressure-switch electrical- connector 3151GN-A.
On panel 40VU:
  • The fault legend of the PTU P/BSW goes OFF.
16.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Yellow hydraulic system.
17.On the HP manifold of the Yellow hydraulic system:
  • Use a shunt to connect pins A and C of system pressure-switch electrical- connector 3151GN-A together.
On panel 40VU:
  • The fault legend of the PTU P/BSW comes ON.
18.After a minimum of 6 seconds.
On the ECAM lower DU:
  • Check that the PTU stops automatically.
19.On the HP manifold of the Yellow hydraulic system:
  • Remove the shunt between pins A and C of flight-control pressure-switch electrical-connector 10CE3-A.
On panel 40VU:
  • The fault legend of the PTU P/BSW goes OFF.
20.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Yellow hydraulic system.
21.On the HP manifold of the Yellow hydraulic system:
  • Connect flight-control pressure-switch electrical-connector 10CE3-A
  • Remove the shunt between pins A and C of system pressure-switch electrical- connector 3151GN-A
  • Connect system pressure-switch electrical-connector 3151GN-A.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Yellow hydraulic system.

On panel 40VU:
  • The fault legend of the PTU P/BSW stays OFF.
22.On panel 121VU:
  • Close circuit breakers 2GA and 59GA.
  • Simulated in flight condition with aircraft on ground is stopped.
23.On panel 85VU:
  • Remove the shunt from connector 1KS1-A.
24.On panel 86VU:
  • Remove the shunt from connector 1KS2-A

Subtask 29-23-00-710-055-D ** ON A/C NOT FOR ALL
A. Operational Check of PTU Inhibition Logic

CAUTION :
WHEN A HYDRAULIC GROUND POWER-SUPPLY OR GROUND CART IS USED, ITS HYDRAULIC FLOW FUNCTION MUST BE LIMITED TO A MAXIMUM OF 50 LITERS PER MINUTE AT NOMINAL PRESSURE (3000 PSI). THIS WILL PREVENT DAMAGE TO THE PTU WHEN STARTING AT HIGH PRESSURE.
   (1) Use the ALT29000001 HYD GRND PWR UNIT3000 and do the test that follows:
ACTION
RESULT
1.Do a check of the Yellow hydraulic system:
On the ECAM lower DU:
  • Check that the PTU pressurizes the Yellow hydraulic system.
2.On panel 121VU:
  • Open circuit breakers 2GA and 59GA.
NOTE: Intermittent illumination of the PTU FAULT light can occur during this test and is permitted. Also FAULT messages shown for less than two seconds can be ignored.
THE FAULT starts continuous less than 2 seconds are thought as temporary.
  • In flight condition with aircraft on ground is simulated.
3.On panel 121VU:
  • Close circuit breaker 1825GL.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Yellow hydraulic system.
4.On the High Pressure (HP) manifold of the Yellow hydraulic system:
  • Disconnect system pressure-switch electrical-connector 3151GN-A
  • Use a shunt to connect pins A and C of the system pressure-switch electrical-connector 3151GN-A together to simulate low pressure condition.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Yellow hydraulic system.
5.On the HP manifold of the Yellow hydraulic system:
  • Remove the shunt between pins A and C of the system pressure-switch electrical-connector 3151GN-A
  • Connect the system pressure-switch electrical-connector 3151GN-A.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Yellow hydraulic system.
6.On the HP manifold of the Yellow hydraulic system:
  • Disconnect the flight-control pressure-switch electrical-connector 10CE3-A to simulate low pressure condition.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Yellow hydraulic system.
7.On the HP manifold of the Yellow hydraulic system:
  • Disconnect the system pressure-switch electrical-connector 3151GN-A
  • Use a shunt to connect pins A and C of the system pressure-switch electrical-connector 3151GN-A together to simulate low pressure condition.

8.After a minimum of 6 seconds.
On panel 40VU:
  • The fault legend of the PTU P/BSW comes ON.
On the ECAM lower DU:
  • Check that the PTU stops automatically.
9.On panel 121VU:
  • Close circuit breakers 2GA and 59GA.
Simulated in flight condition with aircraft on ground is stopped.
On panel 40VU:
  • The fault legend of the PTU P/BSW goes OFF.
10.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Yellow hydraulic system.
11.On panel 121VU:
  • Open circuit breakers 2GA and 59GA.
  • In flight condition with aircraft on ground is simulated.
12.After a minimum of 6 seconds.
On panel 40VU:
  • The fault legend of the PTU P/BSW comes ON.
On the ECAM lower DU:
  • Check that the PTU stops automatically.
13.On the HP manifold of the Yellow hydraulic system:
  • Remove the shunt between pins A and C of system pressure-switch electrical-connector 3151GN-A to simulate high pressure condition.
On panel 40VU:
  • The fault legend of the PTU P/BSW goes OFF.
14.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Yellow hydraulic system.
15.On the HP manifold of the Yellow hydraulic system:
  • Use a shunt to connect pins A and C of system pressure-switch electrical-connector 3151GN-A together to simulate low pressure condition.

16.After a minimum of 6 seconds.
On panel 40VU:
  • The fault legend of the PTU P/BSW comes ON.
On the ECAM lower DU:
  • Check that the PTU stops automatically.
17.On the HP manifold of the Yellow hydraulic system:
  • Use a shunt to connect pins A and B of flight-control pressure-switch electrical-connector 10CE3-A to simulate high pressure condition.
On panel 40VU:
  • The fault legend of the PTU P/BSW goes OFF.
18.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Yellow hydraulic system.
19.On the HP manifold of the Yellow hydraulic system:
  • Remove the shunt between pins A and C of system pressure-switch electrical-connector 3151GN-A
  • Connect system pressure-switch electrical-connector 3151GN-A.
  • Remove the shunt between pins A and B of the flight-control pressure-switch electrical-connector 10CE3-A.
  • Connect the flight-control pressure-switch electrical-connector 10CE3-A
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Yellow hydraulic system.
On panel 40VU:
  • The fault legend of the PTU P/BSW stays OFF.
20.Pressurize the Yellow hydraulic system with the electrical pump (Ref. AMM TASK 29-24-00-863-001).
NOTE: Do not start the electrical pump from the cargo door panel. Use the ELEC PUMP P/BSW on panel 40VU.
On the ECAM lower DU:
  • Check that the PTU stops operation.
21.On the HP manifold of the Green hydraulic system:
  • Disconnect the system pressure-switch electrical-connector 1151GN-A to simulate high pressure condition.

22.On panel 40VU:
  • Push the PTU P/BSW to OFF.

23.Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
On the ECAM lower DU:
  • Check that the PTU does not start.
24.Disconnect the ground cart from the Green hydraulic system.

25.On panel 40VU:
  • Push the PTU P/BSW to AUTO.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Green hydraulic system.
26.On the HP manifold of the Green hydraulic system:
  • Use a shunt to connect pins A and C of the system pressure-switch electrical-connector 1151GN-A together to simulate low pressure condition.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Green hydraulic system.
27.On the HP manifold of the Green hydraulic system:
  • Remove the shunt between pins A and C of system pressure-switch electrical-connector 1151GN-A to simulate high pressure condition.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Green hydraulic system.
28.On the HP manifold of the Green hydraulic system:
  • Disconnect flight-control pressure-switch electrical-connector 10CE2-A to simulate low pressure condition.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Green hydraulic system.
29.On the HP manifold of the Green hydraulic system:
  • Use a shunt to connect pins A and C of the system pressure-switch electrical-connector 1151GN-A together to simulate low pressure condition.

30.After a minimum of 6 seconds.
On panel 40VU:
  • The fault legend of the PTU P/BSW comes ON.
On the ECAM lower DU:
  • Check that the PTU stops automatically.
31.On panel 121VU:
  • Close circuit breakers 2GA and 59GA.
Simulated in flight condition with aircraft on ground is stopped.
On panel 40VU:
  • The fault legend of the PTU P/BSW goes OFF.
32.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the green hydraulic system.

33.On panel 121VU:
  • Open circuit breakers 2GA and 59GA.
In flight condition with aircraft on ground is simulated.
34.After a minimum of 6 seconds.
On panel 40VU:
  • The fault legend of the PTU P/BSW comes ON.
On the ECAM lower DU:
  • Check that the PTU stops automatically.
35.On the HP manifold of the Green hydraulic system:
  • Remove the shunt between pins A and C of system pressure-switch electrical-connector 1151GN-A to simulate high pressure condition.
On panel 40VU:
  • The fault legend of the PTU P/BSW goes OFF.
36.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Green hydraulic system.
37.On the HP manifold of the Green hydraulic system:
  • Use a shunt to connect pins A and C of system pressure-switch electrical-connector 1151GN-A together to simulate low pressure condition.

38.After a minimum of 6 seconds.
On panel 40VU:
  • The fault legend of the PTU P/BSW comes ON.
On the ECAM lower DU:
  • Check that the PTU stops automatically.
39.On the HP manifold of the Green hydraulic system:
  • Use a shunt to connect pins A and B of the flight-control pressure-switch electrical-connector 10CE2-A to simulate high pressure condition.
On panel 40VU:
  • The fault legend of the PTU P/BSW goes OFF.
40.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Green hydraulic system.

41.On the HP manifold of the Green hydraulic system:
  • Remove the shunt between pins A and C of system pressure-switch electrical-connector 1151GN-A.
  • Connect the system pressure-switch electrical-connector 1151GN-A.
  • Remove the shunt between pins A and B of the flight-control pressure-switch electrical-connector 10CE2-A.
  • Connect the flight-control pressure-switch electrical-connector 10CE2-A.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Green hydraulic system.
On panel 40VU:
  • The fault legend of the PTU P/BSW stays OFF.
42.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).
On the ECAM lower DU:
  • Check that the yellow system pressure decreases to 0 psi and that the PTU stops running.
  • Check that the green system is no longer pressurized.
43.On panel 121VU:
  • Close circuit breakers 2GA and 59GA.
Simulated in flight condition with aircraft on ground is stopped.
On panel 40VU:
  • The fault legend of the PTU P/BSW goes OFF.
Subtask 29-23-00-710-056-B ** ON A/C NOT FOR ALL
B. Operational Check of PTU Inhibition Logic of the Green Hydraulic System

CAUTION :
WHEN A HYDRAULIC GROUND POWER-SUPPLY OR GROUND CART IS USED, ITS HYDRAULIC FLOW FUNCTION MUST BE LIMITED TO A MAXIMUM OF 50 LITERS PER MINUTE AT NOMINAL PRESSURE (3000 PSI). THIS WILL PREVENT DAMAGE TO THE PTU WHEN STARTING AT HIGH PRESSURE.
   (1) Use ALT29000001 HYD GRND PWR UNIT3000 and do the test that follows:
ACTION
RESULT
1.On panel 85VU:
  • On connector 1KS1-A, use a shunt to connect pins AB9E and AB10J together.

2.On panel 86VU:
  • On connector 1KS2-A, use a shunt to connect pins AB9E and AB10J together.

3.On panel 121VU:
  • Open circuit breakers 2GA and 59GA.
NOTE: Intermittent illumination of the PTU FAULT light can occur during this test and is permitted. Also FAULT messages shown for less than two seconds can be ignored.
THE FAULT starts continuous less than 2 seconds are thought as temporary.
  • In flight condition with aircraft on ground is simulated.
4.Do a check of the Green hydraulic system:
NOTE: Do not start the electrical pump from the cargo door panel. Use the ELEC PUMP P/BSW on the panel 40VU.
On the ECAM lower DU:
  • Check that the PTU stops operation.
5.On the HP manifold of the Green hydraulic system:
  • Disconnect the system pressure-switch electrical connector 1151GN-A.
NOTE: Connector 1151GN-A must stay disconnected until the end of the step 10. This is to make sure that the PTU does not stop automatically when there is a Green hydraulic low pressure (LO PRESS) condition.

6.On panel 40VU:
  • Push the PTU P/BSW to OFF.

7.Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
On the ECAM lower DU:
  • Check that the PTU does not start.
8.Disconnect the ground cart from the Green hydraulic system.

9.On panel 40VU:
  • Push the PTU P/BSW to AUTO.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Green hydraulic system.
10.On the HP manifold of the Green hydraulic system:
  • Use a shunt to connect pins A and C of the electrical connector 1151GN-A together to simulate low pressure condition for more than 6 seconds.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Green hydraulic system.
11.On the HP manifold of the Green hydraulic system:
  • Remove the shunt between pins A and C of system pressure-switch electrical- connector 1151GN-A
  • Connect system pressure-switch electrical-connector 1151GN-A.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Green hydraulic system.
12.On the HP manifold of the Green hydraulic system:
  • Disconnect flight control-pressure electrical-connector 10CE2-A.
  • Use a shunt to connect pins A and C of the connector together to simulate low pressure condition for more than 6 seconds.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Green hydraulic system.
13.On the HP manifold of the Green hydraulic system:
  • Disconnect system pressure-switch electrical-connector 1151GN-A
  • Use a shunt to connect pins A and C of the connector together.
On panel 40VU:
  • The fault legend of the PTU P/BSW comes ON.
14.After a minimum of 6 seconds.
On the ECAM lower DU:
  • Check that the PTU stops automatically.
15.On panel 121VU:
  • Close circuit breakers 2GA and 59GA.
Simulated in flight condition with aircraft on ground is stopped.
16.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the green hydraulic system.

On panel 40VU:
  • The fault legend of the PTU P/BSW stays ON.
17.On panel 121VU:
  • Open circuit breakers 2GA and 59GA.
  • In flight condition with aircraft on ground is simulated.
18.After a minimum of 6 seconds.
On the ECAM lower DU:
  • Check that the PTU stops automatically.
19.On the HP manifold of the Green hydraulic system:
  • Remove the shunt between pins A and C of system pressure-switch electrical- connector 1151GN-A.
On panel 40VU:
  • The fault legend of the PTU P/BSW goes OFF.
20.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Green hydraulic system.
21.On the HP manifold of the Green hydraulic system:
  • Use a shunt to connect pins A and C of system pressure-switch electrical- connector 1151GN-A together.
On panel 40VU:
  • The fault legend of the PTU P/BSW comes ON.
22.After a minimum of 6 seconds.
On the ECAM lower DU:
  • Check that the PTU stops automatically.
23.On the HP manifold of the Green hydraulic system:
  • Remove the shunt between pins A and C of flight-control pressure-switch electrical-connector 10CE2-A.
On panel 40VU:
  • The fault legend of the PTU P/BSW goes OFF.
24.After a minimum of 20 seconds.
On the ECAM lower DU:
  • Check that the PTU starts and pressurizes the Green hydraulic system.
25.On the HP manifold of the Green hydraulic system:
  • Connect flight-control pressure-switch electrical-connector 10CE2-A
  • Remove the shunt between pins A and C of system pressure-switch electrical- connector 1151GN-A
  • Connect system pressure-switch electrical-connector 1151GN-A.
On the ECAM lower DU:
  • Check that the PTU continues to pressurize the Green hydraulic system.

On panel 40VU:
  • The fault legend of the PTU P/BSW stays OFF.
26.Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-864-001).

27.On panel 121VU:
  • Open circuit breakers 1807GL and 1808GL.
  • Close circuit breakers 2GA and 59GA.
  • Simulated in flight condition with aircraft on ground is stopped.
28.On panel 85VU:
  • Remove the shunt from connector 1KS1-A.
29.On panel 86VU:
  • Remove the shunt from connector 1KS2-A.

5. Close-up
Subtask 29-23-00-865-065-A
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUHYD/HYD PWR/B WARN/& CTL2702GJC12
** ON A/C NOT FOR ALL
121VUPTU INHIT/Y SYS1808GLQ33
121VUPTU INHIT/G SYS1807GLQ32
** ON A/C NOT FOR ALL
121VUHYDRAULIC / PTU FLT INHIB1825GLQ31
** ON A/C NOT FOR ALL
121VUHYDRAULIC-PTU FLT INHIT1825GLQ32
** ON A/C ALL
123VUB HYD/ELEC PUMP2701GJAB09
Subtask 29-23-00-410-053-A ** ON A/C NOT FOR ALL
B. Close Access
   (1) Do the ground configuration after flight configuration with electrical power procedure (Ref. AMM TASK 32-00-00-860-002).
   (2) Install the EIUs:
     (a) Install the EIU (1KS1) (Ref. AMM TASK 73-25-34-400-040).
     (b) Install the EIU (1KS2) (Ref. AMM TASK 73-25-34-400-040).
   (3) Close access panel 196BB (Ref. AMM TASK 53-35-13-400-002).
   (4) Close the main landing-gear doors (Ref. AMM TASK 32-12-00-410-001).
   (5) Make sure that the work area is clean and clear of tools and other items.
   (6) Remove the access platform(s).
Subtask 29-23-00-410-053-C ** ON A/C NOT FOR ALL
B. Close Access
   (1) Do the ground configuration after flight configuration with electrical power procedure (Ref. AMM TASK 32-00-00-860-002).
   (2) Make sure that the work area is clean and clear of tools and other items.
   (3) Close access panel 196BB (Ref. AMM TASK 53-35-13-400-002).
   (4) Close the main landing-gear doors (Ref. AMM TASK 32-12-00-410-001).
   (5) Remove the access platform(s).
Subtask 29-23-00-410-053-H ** ON A/C NOT FOR ALL
B. Close Access
   (1) Do the ground configuration after flight configuration with electrical power procedure (Ref. AMM TASK 32-00-00-860-002).
   (2) Install the EIUs:
     (a) Install the EIU (1KS1) (Ref. AMM TASK 73-25-34-400-041).
     (b) Install the EIU (1KS2) (Ref. AMM TASK 73-25-34-400-041).
   (3) Close access panel 196BB (Ref. AMM TASK 53-35-13-400-002).
   (4) Close the main landing-gear doors (Ref. AMM TASK 32-12-00-410-001).
   (5) Make sure that the work area is clean and clear of tools and other items.
   (6) Remove the access platform(s).
Subtask 29-23-00-860-065-A
C. Put the aircraft back to the serviceable condition.
   (1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
   (2) In the cockpit, make sure that the parking brake is in the ON position.
   (3) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.01 00:26:44 UTC
"Aviabrain" 2025