DOC AIRBUS | AMM A320FCheck of the Internal Leakage of the Blue Hydraulic System
TASK 29-00-00-280-002-A
Check of the Internal Leakage of the Blue Hydraulic System
To make sure that the internal leakage of the system and parts of the system are in limits.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 29-00-00-010-052-A ** ON A/C NOT FOR ALL Subtask 29-00-00-010-052-B ** ON A/C NOT FOR ALL
Subtask 29-00-00-280-055-A ** ON A/C NOT FOR ALL
Subtask 29-00-00-860-055-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 04:44:21 UTC
Check of the Internal Leakage of the Blue Hydraulic System
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.
1. Reason for the JobTo make sure that the internal leakage of the system and parts of the system are in limits.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | FLOWMETER 20.00 L.MN (5.2833 US GAL.MN) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| 610007AB | 1 | TOOL-MEASURE,HYDRAULIC FLOW |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 195BB, 197EB |
| REFERENCE | DESIGNATION |
|---|---|
| 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 29-10-00-863-003-A | Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart |
| 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 31-60-00-860-001-A | EIS Start Procedure |
| TASK 31-60-00-860-002-A | EIS Stop Procedure |
Subtask 29-00-00-010-052-A ** ON A/C NOT FOR ALL Subtask 29-00-00-010-052-B ** ON A/C NOT FOR ALL
A. Get Access
(1) Open access door 195BB.
(2) If an ultrasonic flow meter is not used in procedure that follows, open access door 197EB.
Subtask 29-00-00-865-051-A (1) Open access door 195BB.
(2) If an ultrasonic flow meter is not used in procedure that follows, open access door 197EB.
B. Make sure that this(these) circuit breaker(s) is(are) closed:
Subtask 29-00-00-865-053-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B08 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B03 |
| ** ON A/C ALL | |||
| 105VU | FLIGHT CONTROLS/ELAC2/STBY SPLY | 16CE2 | A02 |
| 105VU | FLT CTL/ELAC1/STBY SPLY | 16CE1 | A01 |
| 105VU | FLT CTL/SEC1/STBY SPLY | 22CE | B01 |
| 121VU | HYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST | 1881GP | N35 |
| 121VU | FLIGHT CONTROLS/SEC3/SPLY | 21CE3 | Q19 |
| 121VU | FLIGHT CONTROLS/SEC2/SPLY | 21CE2 | Q18 |
| 121VU | FLIGHT CONTROLS/ELAC2/NORM/SPLY | 15CE2 | R20 |
C. Open, safety and tag this(these) circuit breaker(s):
Subtask 29-00-00-860-054-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 49VU | HYD/HYD PWR/B WARN/& CTL | 2702GJ | C12 |
| 123VU | B HYD/ELEC PUMP | 2701GJ | AB09 |
D. Aircraft Maintenance Configuration
(1) Connect a ground service cart with a FLOWMETER 20.00 L.MN (5.2833 US GAL.MN), calibrated to +/- 1.5% over full range to the ground test connections of the Blue hydraulic system.
(2) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(3) Set the ECAM system to ON (Ref. AMM TASK 31-60-00-860-001).
(4) On the ECAM control panel on the center pedestal, push the F/CTL pushbutton (P/B). Make sure that the lower display unit (DU) shows the F/CTL page.
(5) Pressurize the Blue hydraulic system from the ground supply (Ref. AMM TASK 29-10-00-863-003).
(6) On overhead panel 23VU, make sure that the ELAC 1 and SEC 1 pushbutton switches (P/BSW) are set to on (OFF and FAULT lights not on).
(7) On overhead panel 24VU, make sure that the ELAC 2, SEC 2 and SEC 3 P/BSW are set to on (OFF and FAULT lights not on).
(9) Keep all of the control surfaces stopped in the 0 deg (retracted) position during measurement of internal leakage.
Subtask 29-00-00-860-054-B ** ON A/C NOT FOR ALL (1) Connect a ground service cart with a FLOWMETER 20.00 L.MN (5.2833 US GAL.MN), calibrated to +/- 1.5% over full range to the ground test connections of the Blue hydraulic system.
(2) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(3) Set the ECAM system to ON (Ref. AMM TASK 31-60-00-860-001).
(4) On the ECAM control panel on the center pedestal, push the F/CTL pushbutton (P/B). Make sure that the lower display unit (DU) shows the F/CTL page.
(5) Pressurize the Blue hydraulic system from the ground supply (Ref. AMM TASK 29-10-00-863-003).
(6) On overhead panel 23VU, make sure that the ELAC 1 and SEC 1 pushbutton switches (P/BSW) are set to on (OFF and FAULT lights not on).
(7) On overhead panel 24VU, make sure that the ELAC 2, SEC 2 and SEC 3 P/BSW are set to on (OFF and FAULT lights not on).
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.
(8) Operate the sidestick and rudder pedals to put the control surfaces associated with the Blue hydraulic system to the 0 deg. position (spoilers retracted). (9) Keep all of the control surfaces stopped in the 0 deg (retracted) position during measurement of internal leakage.
NOTE: Do the checks of internal leakage with the hydraulic fluid at its usual working temperature of between 20 deg.C (68.00 deg.F) and 60 deg.C (140.00 deg.F).
D. Aircraft Maintenance Configuration
(1) If an ultrasonic flow meter is used in the procedure that follows:
(a) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(b) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(c) On the ECAM control panel on the center pedestal, push the F/CTL pushbutton (P/B). Make sure that the lower display unit (DU) shows the F/CTL page.
(d) Pressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-863-003).
(2) If an ultrasonic flow meter is not used in the procedure that follows:
(a) Connect a ground service cart with a FLOWMETER 20.00 L.MN (5.2833 US GAL.MN), calibrated to +/- 1.5% over full range to the ground connections of the Blue hydraulic system.
(b) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(c) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(d) On the ECAM control panel on the center pedestal, push the F/CTL pushbutton (P/B). Make sure that the lower display unit (DU) shows the F/CTL page.
(e) Pressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-863-003).
(3) On overhead panel 23VU, make sure that the ELAC 1 and SEC 1 pushbutton switches (P/BSW) are set to on (the OFF and FAULT lights are off).
(4) On overhead panel 24VU, make sure that the ELAC 2, SEC 2 and SEC3 P/BSW are set to on (the OFF and FAULT lights are off).
(6) Keep all of the control surfaces stopped in the 0 deg (retracted) position during measurement of internal leakage.
(7) Do the checks of internal leakage with the hydraulic fluid at its usual working temperature of between 20 deg.C (68.00 deg.F) and 60 deg.C (140.00 deg.F).
4. Procedure(1) If an ultrasonic flow meter is used in the procedure that follows:
(a) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(b) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(c) On the ECAM control panel on the center pedestal, push the F/CTL pushbutton (P/B). Make sure that the lower display unit (DU) shows the F/CTL page.
(d) Pressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-863-003).
(2) If an ultrasonic flow meter is not used in the procedure that follows:
(a) Connect a ground service cart with a FLOWMETER 20.00 L.MN (5.2833 US GAL.MN), calibrated to +/- 1.5% over full range to the ground connections of the Blue hydraulic system.
(b) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(c) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(d) On the ECAM control panel on the center pedestal, push the F/CTL pushbutton (P/B). Make sure that the lower display unit (DU) shows the F/CTL page.
(e) Pressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-863-003).
(3) On overhead panel 23VU, make sure that the ELAC 1 and SEC 1 pushbutton switches (P/BSW) are set to on (the OFF and FAULT lights are off).
(4) On overhead panel 24VU, make sure that the ELAC 2, SEC 2 and SEC3 P/BSW are set to on (the OFF and FAULT lights are off).
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.
(5) Operate the sidestick and rudder pedals to put the control surfaces in the 0 deg. position (spoilers retracted). (6) Keep all of the control surfaces stopped in the 0 deg (retracted) position during measurement of internal leakage.
(7) Do the checks of internal leakage with the hydraulic fluid at its usual working temperature of between 20 deg.C (68.00 deg.F) and 60 deg.C (140.00 deg.F).
Subtask 29-00-00-280-055-A ** ON A/C NOT FOR ALL
A. Check of the Internal Leakage of the Blue Hydraulic System
(1) Measurement of the Blue system (complete) internal leakage
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/B P/BSW is set to on (OFF light not on).
(b) Monitor the flow shown on the ground supply flowmeter. It must not be more than 7.5 l.min (1.9813 USgal.mn).
(c) If the internal leakage is more than 7.5 l.min (1.9813 USgal.mn) do the checks of sections of the system to find the cause.
(2) Measurement of the Blue system (central section) internal leakage
(a) On the ground hydraulic supply, stop the supply of hydraulic fluid to the aircraft.
(b) On the ECAM control panel on the center pedestal, push the HYD P/B. Make sure that the lower DU shows the HYD page.
(c) On overhead maintenance panel 50VU, lift the guard and set the HYD/LEAK MEASUREMENT VALVES/B P/BSW to off (OFF light comes on).
(d) On the ground hydraulic supply, increase the supply of hydraulic pressure to 3000 psi (207 bar).
(e) Refer to the lower DU to make sure that the solenoid valve operation is correct (the color of the flow arrow and system name of the Blue system is amber).
(f) In the Blue system compartment, make sure that the three valves on the leakage measurement selector valve are set to OFF.
(g) Monitor the flow shown on the ground supply flowmeter. It must not be more than 0.7 l.min (0.1849 USgal.mn).
(3) Measurement of the Blue system (rear section) internal leakage:
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/B P/BSW is set to off (OFF light is on).
(b) If the P/BSW is not set to off (OFF light not on):
1 Stop the supply of pressure to the aircraft.
2 Wait for the pressure in the system to decrease.
3 Set the P/BSW to off (OFF light comes on).
4 Increase the supply of pressure to the same pressure as before.
(c) In the Blue system compartment, turn the REAR manual selector valve to the ON position.
(d) Monitor the flow shown on the ground supply flowmeter. It must not be more than 5.0 l.min (1.3208 USgal.mn).
(e) In the Blue system compartment, turn the REAR manual selector valve to the OFF position.
(4) Measurement of the Blue system (left wing section) internal leakage
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/B P/BSW is set to off (OFF light is on).
(b) If the P/BSW is not set to off (OFF light not on):
1 Stop the supply of pressure to the aircraft.
2 Wait for the pressure in the system to decrease.
3 Set the P/BSW to off (OFF light comes on).
4 Increase the supply of pressure to the same pressure as before.
(c) In the Blue system compartment, turn the LH WING manual selector valve to the ON position.
(d) Monitor the flow shown on the ground supply flowmeter. It must not be more than 2.2 l.min (0.5812 USgal.mn).
(e) In the Blue system compartment, turn the LH WING manual selector valve to the OFF position.
(5) Measurement of the Blue system (right wing section) internal leakage
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/B P/BSW is set to off (OFF light is on).
(b) If the P/BSW is not set to off (OFF light not on):
1 Stop the supply of pressure to the aircraft.
2 Wait for the pressure in the system to decrease.
3 Set the P/BSW to off (OFF light comes on).
4 Increase the supply of pressure to the same pressure as before.
(c) In the Blue system compartment, turn the RH WING manual selector valve to the ON position.
(d) Monitor the flow shown on the ground supply flowmeter. It must not be more than 2.2 l.min (0.5812 USgal.mn).
(e) In the Blue system compartment, turn the RH WING manual selector valve to the OFF position.
(6) Permitted leakage rates of the components:
(a) The maximum internal leakage permitted for components related to the Blue hydraulic system is:
Aileron servocontrol: 1.5 l.min (0.3963 USgal.mn)
Spoiler 3: 0.8 l.min (0.2113 USgal.mn)
Elevator servocontrol: 1.5 l.min (0.3963 USgal.mn)
Rudder servocontrol: 2.1 l.min (0.5548 USgal.mn)
Slat PCU valve block: 0.2 l.min (0.0528 USgal.mn)
RAT warm-oil flow: 0.5 l.min (0.1321 USgal.mn)
1 Listen to the pipes and components which may be the cause.
2 Feel the pipes and components, a high leakage rate will cause an increase in their temperature.
Subtask 29-00-00-280-055-B ** ON A/C NOT FOR ALL (1) Measurement of the Blue system (complete) internal leakage
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/B P/BSW is set to on (OFF light not on).
(b) Monitor the flow shown on the ground supply flowmeter. It must not be more than 7.5 l.min (1.9813 USgal.mn).
(c) If the internal leakage is more than 7.5 l.min (1.9813 USgal.mn) do the checks of sections of the system to find the cause.
(2) Measurement of the Blue system (central section) internal leakage
(a) On the ground hydraulic supply, stop the supply of hydraulic fluid to the aircraft.
(b) On the ECAM control panel on the center pedestal, push the HYD P/B. Make sure that the lower DU shows the HYD page.
(c) On overhead maintenance panel 50VU, lift the guard and set the HYD/LEAK MEASUREMENT VALVES/B P/BSW to off (OFF light comes on).
(d) On the ground hydraulic supply, increase the supply of hydraulic pressure to 3000 psi (207 bar).
(e) Refer to the lower DU to make sure that the solenoid valve operation is correct (the color of the flow arrow and system name of the Blue system is amber).
(f) In the Blue system compartment, make sure that the three valves on the leakage measurement selector valve are set to OFF.
(g) Monitor the flow shown on the ground supply flowmeter. It must not be more than 0.7 l.min (0.1849 USgal.mn).
(3) Measurement of the Blue system (rear section) internal leakage:
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/B P/BSW is set to off (OFF light is on).
(b) If the P/BSW is not set to off (OFF light not on):
1 Stop the supply of pressure to the aircraft.
2 Wait for the pressure in the system to decrease.
3 Set the P/BSW to off (OFF light comes on).
4 Increase the supply of pressure to the same pressure as before.
(c) In the Blue system compartment, turn the REAR manual selector valve to the ON position.
(d) Monitor the flow shown on the ground supply flowmeter. It must not be more than 5.0 l.min (1.3208 USgal.mn).
(e) In the Blue system compartment, turn the REAR manual selector valve to the OFF position.
(4) Measurement of the Blue system (left wing section) internal leakage
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/B P/BSW is set to off (OFF light is on).
(b) If the P/BSW is not set to off (OFF light not on):
1 Stop the supply of pressure to the aircraft.
2 Wait for the pressure in the system to decrease.
3 Set the P/BSW to off (OFF light comes on).
4 Increase the supply of pressure to the same pressure as before.
(c) In the Blue system compartment, turn the LH WING manual selector valve to the ON position.
(d) Monitor the flow shown on the ground supply flowmeter. It must not be more than 2.2 l.min (0.5812 USgal.mn).
(e) In the Blue system compartment, turn the LH WING manual selector valve to the OFF position.
(5) Measurement of the Blue system (right wing section) internal leakage
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/B P/BSW is set to off (OFF light is on).
(b) If the P/BSW is not set to off (OFF light not on):
1 Stop the supply of pressure to the aircraft.
2 Wait for the pressure in the system to decrease.
3 Set the P/BSW to off (OFF light comes on).
4 Increase the supply of pressure to the same pressure as before.
(c) In the Blue system compartment, turn the RH WING manual selector valve to the ON position.
(d) Monitor the flow shown on the ground supply flowmeter. It must not be more than 2.2 l.min (0.5812 USgal.mn).
(e) In the Blue system compartment, turn the RH WING manual selector valve to the OFF position.
(6) Permitted leakage rates of the components:
(a) The maximum internal leakage permitted for components related to the Blue hydraulic system is:
Aileron servocontrol: 1.5 l.min (0.3963 USgal.mn)
Spoiler 3: 0.8 l.min (0.2113 USgal.mn)
Elevator servocontrol: 1.5 l.min (0.3963 USgal.mn)
Rudder servocontrol: 2.1 l.min (0.5548 USgal.mn)
Slat PCU valve block: 0.2 l.min (0.0528 USgal.mn)
RAT warm-oil flow: 0.5 l.min (0.1321 USgal.mn)
NOTE: The maximum leakage rates for components are given only to assist in trouble shooting. The total leakage of components in a section (left wing, right wing, etc) of the system must be less than the permitted maximum for that section. Also the total leakages of the sections must not together be more than the leakage permitted for the complete system.
(b) If the internal leakage rate is too high you can find the defective component if you: 1 Listen to the pipes and components which may be the cause.
2 Feel the pipes and components, a high leakage rate will cause an increase in their temperature.
CAUTION:
DO NOT DISCONNECT AND CAP THE RETURN LINE FROM A SERVOCONTROL TO DO A LEAKAGE CHECK. IF A SUPPLY OF SYSTEM PRESSURE GETS TO THE SERVOCONTROL IT CAN CAUSE DAMAGE IF THERE IS NO RETURN FLOW.
(c) If you think that a servocontrol is the cause, disconnect and cap the supply to the servocontrol. Do the test again and if the leakage rate is now in limits,the servocontrol is confirmed as defective. A. Check of the Internal Leakage of the Blue Hydraulic System
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/B P/BSW is set to on (OFF light is not on).
(b) Monitor the flow shown on the ground supply flow meter. It must not be more than 7.5 l.min (1.9813 USgal.mn).
(c) If the internal leakage is more than 7.5 l.min (1.9813 USgal.mn):
1 Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).
2 Disconnect the ground supply from aircraft ground test connections.
3 Pressurize the Blue hydraulic system
with electric pump (Ref. AMM TASK 29-10-00-863-003).
4 Do the leakage check of all sections of the Blue hydraulic system to find the cause of high leakage.
(2) Measure the Blue hydraulic system (central section) internal leakage with an ultrasonic flow meter:
Blue Hydraulic System - Central Section ** ON A/C NOT FOR ALL
Blue Hydraulic System - Central Section ** ON A/C NOT FOR ALL
(a) On the ECAM control panel on the center pedestal, push the HYD P/B. Make sure that the lower DU shows the HYD page.
(b) On overhead maintenance panel 50VU, lift the guard and set the HYD/LEAK MEASUREMENT VALVES/G P/BSW to OFF (the OFF light is on).
(c) Refer to the lower DU of the ECAM (HYD page) to make sure that the solenoid valve operation is correct (the color of the flow arrow and system name of the Blue system is amber).
(d) Refer to the ground instruction manual of the ultrasonic flow meter to make sure that the correct software is installed.
(e) Clean the tube (1) between the identification tapes (2) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(f) Remove the remaining acoustic coupling compound from the leakage transducer (5) with a Textile-Lint free Cotton - (Material No.14SBA1) . Do not use a detergent to clean the leakage transducer (5).
(g) Apply a thin layer of the acoustic coupling compound (part of USF FLUXUS GST 6108, 610007AB TOOL-MEASURE,HYDRAULIC FLOW) to the contact surfaces of the leakage transducer (5).
(h) Install the leakage transducer (5) between the identification tapes (2) on the pipe (1):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to the stop.
2 Put the leakage transducer (5) in position on the pipe (1) between the identification tapes (2) and push it tightly on the pipe (1).
3 Push the knurled screw (6) in and attach the fastening strap (4) around the pipe (1) with the thread element (3).
4 Put the fastening strap (4) through the upper slot of the strap clamp (7) and then through the lower one.
5 Make sure that the fastening strap (4) has a correct tension. And make sure that the knurled screw (6) is pushed in up to the stop.
6 Tighten the knurled screw (6) to attach the leakage transducer (5) to the pipe (1).
(i) Connect the leakage transducer cable (8) to the transmitter (9).
(j) Refer to the ground instruction manual of the ultrasonic flow meter to set:
(l) Monitor the flow on the ultrasonic flow meter display. It must not be more than 0.7 l.min (0.18 USgal.mn).
(m) If the internal leakage is more than 0.7 l.min (0.18 USgal.mn) do the steps in Para A.(7) to find the cause of the high internal leakage.
(n) Remove the leakage transducer (5):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to disconnect the leakage transducer (5) from the pipe (1).
2 Push the knurled screw (6) in and disconnect the fastening strap (4) from the strap clamp (7).
3 Remove the leakage transducer (5) from the pipe (1).
(o) Disconnect the leakage transducer cable (8) from the transmitter (9).
(3) Measure the Blue hydraulic system (complete section) internal leakage with ultrasonic flow meter:
Blue Hydraulic System - Complete Section ** ON A/C NOT FOR ALL
Blue Hydraulic System - Complete Section ** ON A/C NOT FOR ALL
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/G P/BSW is set to on (the OFF light is off).
(b) Refer to the lower DU of the ECAM (HYD page) to make sure that the solenoid valve operation is correct (the flow arrow of the Blue hydraulic system is green and the system name is white).
(c) Refer to the ground instruction manual of the ultrasonic flow meter to make sure that the correct software is installed.
(d) Clean the tube (1) between the identification tapes (2) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(e) Remove the remaining acoustic coupling compound from the leakage transducer (5) with a Textile-Lint free Cotton - (Material No.14SBA1) . Do not use a detergent to clean the leakage transducer (5).
(f) Apply a thin layer of the acoustic coupling compound (part of USF FLUXUS GST 6108, 610007AB TOOL-MEASURE,HYDRAULIC FLOW) to the contact surfaces of the leakage transducer (5).
(g) Install the leakage transducer (5) between the identification tapes (2) on the pipe (1):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to the stop.
2 Put the leakage transducer (5) in position on the pipe (1) between the identification tapes (2) and push it tightly on the pipe (1).
3 Push the knurled screw (6) in and attach the fastening strap (4) around the pipe (1) with the thread element (3).
4 Put the fastening strap (4) through the upper slot of the strap clamp (7) and then through the lower one.
5 Make sure that the fastening strap (4) has the correct tension. And make sure that the knurled screw (6) is pushed in up to the stop.
6 Tighten the knurled screw (6) to attach the leakage transducer (5) to the pipe (1).
(h) Connect the leakage transducer cable (8) to the transmitter (9).
(i) Refer to the ground instruction manual of the ultrasonic flow meter to set:
(k) Monitor the flow on the ultrasonic flow meter display. It must not be more than 7.5 l.min (1.98 USgal.mn).
(l) If the internal leakage is more than 7.5 l.min (1.98 USgal.mn) do the measurements that follow to find the cause of the high internal leakage:
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to disconnect the leakage transducer (5) from the pipe (1).
2 Push the knurled screw (6) in and disconnect the fastening strap (4) from the strap clamp (7).
3 Remove the leakage transducer (5) from the pipe (1).
(n) Disconnect the leakage transducer cable (8) from the transmitter (9).
(4) Measure of the Blue hydraulic system (rear section) internal leakage with ultrasonic flow meter:
Blue Hydraulic System - Rear Section ** ON A/C NOT FOR ALL
Blue Hydraulic System - Rear Section ** ON A/C NOT FOR ALL
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/G P/BSW is set to on (the OFF light is off).
(b) Refer to the lower DU of the ECAM (HYD page) to make sure that the solenoid valve operation is correct (the flow arrow of the Blue hydraulic system is green and the system name is white).
(c) Refer to the ground instruction manual of the ultrasonic flow meter to make sure that the correct software is installed.
(d) Clean the tube (1) between the identification tapes (2) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(e) Remove the remaining acoustic coupling compound from the leakage transducer (5) with a Textile-Lint free Cotton - (Material No.14SBA1) . Do not use a detergent to clean the leakage transducer (5).
(f) Apply a thin layer of the acoustic coupling compound (part of USF FLUXUS GST 6108, 610007AB TOOL-MEASURE,HYDRAULIC FLOW) to the contact surfaces of the leakage transducer (5).
(g) Install the leakage transducer (5) between the identification tapes (2) on the pipe (1):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to the stop.
2 Put the leakage transducer (5) in position on the pipe (1) between the identification tapes (2) and push it tightly on the pipe (1).
3 Push the knurled screw (6) in and attach the fastening strap (4) around the pipe (1) with the thread element (3).
4 Put the fastening strap (4) through the upper slot of the strap clamp (7) and then through the lower one.
5 Make sure that the fastening strap (4) has the correct tension. And make sure that the knurled screw (6) is pushed in up to the stop.
6 Tighten the knurled screw (6) to attach the leakage transducer (5) to the pipe (1).
(h) Connect the leakage transducer cable (8) to the transmitter (9).
(i) Refer to the ground instruction manual of the ultrasonic flow meter to set:
(k) Monitor the flow on the ultrasonic flow meter display. It must not be more than 5.0 l.min (1.32 USgal.mn).
(l) If the internal leakage is more than 5.0 l.min (1.32 USgal.mn) do the steps in Para A.(7) to find the cause of the high internal leakage.
(m) Remove the leakage transducer (5):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to disconnect the leakage transducer (5) from the pipe (1).
2 Push the knurled screw (6) in and disconnect the fastening strap (4) from the strap clamp (7).
3 Remove the leakage transducer (5) from the pipe (1).
(n) Disconnect the leakage transducer cable (8) from the transmitter (9).
(5) Measurement of the Blue hydraulic system (left wing section) internal leakage with ultrasonic flow meter:
Blue Hydraulic System - Left Wing Section ** ON A/C NOT FOR ALL
Blue Hydraulic System - Left Wing Section ** ON A/C NOT FOR ALL
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/G P/BSW is set to on (the OFF light is off).
(b) Refer to the lower DU of the ECAM (HYD page) to make sure that the solenoid valve operation is correct (the flow arrow of the Blue hydraulic system is green and the system name is white).
(c) Refer to the ground instruction manual of the ultrasonic flow meter to make sure that the correct software is installed.
(d) Clean the tube (1) between the identification tapes (2) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(e) Remove the remaining acoustic coupling compound from the leakage transducer (5) with Textile-Lint free Cotton - (Material No.14SBA1) . Do not use a detergent to clean the leakage transducer (5).
(f) Apply a thin layer of the acoustic coupling compound (part of USF FLUXUS GST 6108, 610007AB TOOL-MEASURE,HYDRAULIC FLOW) to the contact surfaces of the leakage transducer (5).
(g) Install the leakage transducer (5) between the identification tapes (2) on the pipe (1):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to the stop.
2 Put the leakage transducer (5) in position on the pipe (1) between the identification tapes (2) and push it tightly on the pipe (1).
3 Push the knurled screw (6) in and attach the fastening strap (4) around the pipe (1) with the thread element (3).
4 Put the fastening strap (4) through the upper slot of the strap clamp (7) and then through the lower one.
5 Make sure that the fastening strap (4) has the correct tension. And make sure that the knurled screw (6) is pushed in up to the stop.
6 Tighten the knurled screw (6) to attach the leakage transducer (5) to the pipe (1).
(h) Connect the leakage transducer cable (8) to the transmitter (9).
(i) Refer to the ground instruction manual of the ultrasonic flow meter to set:
(k) Monitor the flow on the ultrasonic flow meter display. It must not be more than 2.2 l.min (0.58 USgal.mn).
(l) If the internal leakage is more than 2.2 l.min (0.58 USgal.mn) do the steps in Para A.(7) to find the cause of the high internal leakage.
(m) Remove the leakage transducer (5):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to disconnect the leakage transducer (5) from the pipe (1).
2 Push the knurled screw (6) in and disconnect the fastening strap (4) from the strap clamp (7).
3 Remove the leakage transducer (5) from the pipe (1).
(n) Disconnect the leakage transducer cable (8) from the transmitter (9).
(6) Measure of the Blue hydraulic system (right wing section) internal leakage with ultrasonic flow meter:
Blue Hydraulic System - Right Wing Section ** ON A/C NOT FOR ALL
Blue Hydraulic System - Right Wing Section ** ON A/C NOT FOR ALL
(a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/G P/BSW is set to on (the OFF light is off).
(b) Refer to the lower DU of the ECAM (HYD page) to make sure that the solenoid valve operation is correct (the flow arrow of the Blue hydraulic system is green and the system name is white).
(c) Refer to the ground instruction manual of the ultrasonic flow meter to make sure that the correct software is installed.
(d) Clean the tube (1) between the identification tapes (2) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(e) Remove the remaining acoustic compound from the leakage transducer (5) with a Textile-Lint free Cotton - (Material No.14SBA1) . Do not use a detergent to clean the leakage transducer (5).
(f) Apply a thin layer of the acoustic coupling compound (part of USF FLUXUS GST 6108, 610007AB TOOL-MEASURE,HYDRAULIC FLOW) to the contact surfaces of the leakage transducer (5).
(g) Install the leakage transducer (5) between the identification tapes (2) on the pipe (1):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to the stop.
2 Put the leakage transducer (5) in position on the pipe (1) between the identification tapes (2) and push it tightly on the pipe (1).
3 Push the knurled screw (6) in and attach the fastening strap (4) around the pipe (1) with the thread element (3).
4 Put the fastening strap (4) through the upper slot of the strap clamp (7) and then through the lower one.
5 Make sure that the fastening strap (4) has the correct tension. And make sure that the knurled screw (6) is pushed in up to the stop.
6 Tighten the knurled screw (6) to attach the leakage transducer (5) to the pipe (1).
(h) Connect the leakage transducer cable (8) to the transmitter (9).
(i) Refer to the ground instruction manual of the ultrasonic flow meter to set:
(k) Monitor the flow on the ultrasonic flow meter display. It must not be more than 2.2 l.min (0.58 USgal.mn).
(l) If the internal leakage is more than 2.2 l.min (0.58 USgal.mn) do the steps in Para A.(7) to find the cause (s) of the high internal leakage.
(m) Remove the leakage transducer (5):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to disconnect the leakage transducer (5) from the pipe (1).
2 Push the knurled screw (6) in and disconnect the fastening strap (4) from the strap clamp (7).
3 Remove the leakage transducer (5) from the pipe (1).
(n) Disconnect the leakage transducer cable (8) from the transmitter (9).
(7) Permitted leakage rates of the components and how to find the defective component
(a) The maximum permitted internal leakage for components related to the Blue hydraulic system is:
Aileron servocontrol: 1.5 l.min (0.39 USgal.mn)
Spoiler 3: 0.8 l.min (0.21 USgal.mn)
Elevator servocontrol: 1.5 l.min (0.39 USgal.mn)
Rudder servocontrol: 2.1 l.min (0.55 USgal.mn)
Slat PCU valve block: 0.2 l.min (0.05 USgal.mn)
RAT warm oil flow: 0.5 l.min (0.13 USgal.mn)
1 Listen to the pipes and components which may be the cause.
2 Touch the pipes and components, a high leakage rate will cause an increase in their temperature.
5. Close-upNOTE: You can do this test with or without an ultrasonic flow meter. If the internal leakage is out of limits then the ultrasonic flow meter must be used to prevent an aircraft-on-ground (AOG) condition.
(1) Measure the internal leakage of the Blue hydraulic system (complete) without an ultrasonic flow meter: (a) On overhead maintenance panel 50VU, make sure that the HYD/LEAK MEASUREMENT VALVES/B P/BSW is set to on (OFF light is not on).
(b) Monitor the flow shown on the ground supply flow meter. It must not be more than 7.5 l.min (1.9813 USgal.mn).
(c) If the internal leakage is more than 7.5 l.min (1.9813 USgal.mn):
1 Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).
2 Disconnect the ground supply from aircraft ground test connections.
3 Pressurize the Blue hydraulic system
with electric pump (Ref. AMM TASK 29-10-00-863-003).
4 Do the leakage check of all sections of the Blue hydraulic system to find the cause of high leakage.
(2) Measure the Blue hydraulic system (central section) internal leakage with an ultrasonic flow meter:
Blue Hydraulic System - Central Section ** ON A/C NOT FOR ALL Blue Hydraulic System - Central Section ** ON A/C NOT FOR ALL (b) On overhead maintenance panel 50VU, lift the guard and set the HYD/LEAK MEASUREMENT VALVES/G P/BSW to OFF (the OFF light is on).
(c) Refer to the lower DU of the ECAM (HYD page) to make sure that the solenoid valve operation is correct (the color of the flow arrow and system name of the Blue system is amber).
(d) Refer to the ground instruction manual of the ultrasonic flow meter to make sure that the correct software is installed.
(e) Clean the tube (1) between the identification tapes (2) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(f) Remove the remaining acoustic coupling compound from the leakage transducer (5) with a Textile-Lint free Cotton - (Material No.14SBA1) . Do not use a detergent to clean the leakage transducer (5).
(g) Apply a thin layer of the acoustic coupling compound (part of USF FLUXUS GST 6108, 610007AB TOOL-MEASURE,HYDRAULIC FLOW) to the contact surfaces of the leakage transducer (5).
(h) Install the leakage transducer (5) between the identification tapes (2) on the pipe (1):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to the stop.
2 Put the leakage transducer (5) in position on the pipe (1) between the identification tapes (2) and push it tightly on the pipe (1).
3 Push the knurled screw (6) in and attach the fastening strap (4) around the pipe (1) with the thread element (3).
4 Put the fastening strap (4) through the upper slot of the strap clamp (7) and then through the lower one.
5 Make sure that the fastening strap (4) has a correct tension. And make sure that the knurled screw (6) is pushed in up to the stop.
6 Tighten the knurled screw (6) to attach the leakage transducer (5) to the pipe (1).
(i) Connect the leakage transducer cable (8) to the transmitter (9).
(j) Refer to the ground instruction manual of the ultrasonic flow meter to set:
- The serial number of the airplane
- The input location code on the ultrasonic flow meter to numeric code: 13280695 (Blue central section).
(l) Monitor the flow on the ultrasonic flow meter display. It must not be more than 0.7 l.min (0.18 USgal.mn).
(m) If the internal leakage is more than 0.7 l.min (0.18 USgal.mn) do the steps in Para A.(7) to find the cause of the high internal leakage.
(n) Remove the leakage transducer (5):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to disconnect the leakage transducer (5) from the pipe (1).
2 Push the knurled screw (6) in and disconnect the fastening strap (4) from the strap clamp (7).
3 Remove the leakage transducer (5) from the pipe (1).
(o) Disconnect the leakage transducer cable (8) from the transmitter (9).
(3) Measure the Blue hydraulic system (complete section) internal leakage with ultrasonic flow meter:
Blue Hydraulic System - Complete Section ** ON A/C NOT FOR ALL Blue Hydraulic System - Complete Section ** ON A/C NOT FOR ALL (b) Refer to the lower DU of the ECAM (HYD page) to make sure that the solenoid valve operation is correct (the flow arrow of the Blue hydraulic system is green and the system name is white).
(c) Refer to the ground instruction manual of the ultrasonic flow meter to make sure that the correct software is installed.
(d) Clean the tube (1) between the identification tapes (2) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(e) Remove the remaining acoustic coupling compound from the leakage transducer (5) with a Textile-Lint free Cotton - (Material No.14SBA1) . Do not use a detergent to clean the leakage transducer (5).
(f) Apply a thin layer of the acoustic coupling compound (part of USF FLUXUS GST 6108, 610007AB TOOL-MEASURE,HYDRAULIC FLOW) to the contact surfaces of the leakage transducer (5).
(g) Install the leakage transducer (5) between the identification tapes (2) on the pipe (1):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to the stop.
2 Put the leakage transducer (5) in position on the pipe (1) between the identification tapes (2) and push it tightly on the pipe (1).
3 Push the knurled screw (6) in and attach the fastening strap (4) around the pipe (1) with the thread element (3).
4 Put the fastening strap (4) through the upper slot of the strap clamp (7) and then through the lower one.
5 Make sure that the fastening strap (4) has the correct tension. And make sure that the knurled screw (6) is pushed in up to the stop.
6 Tighten the knurled screw (6) to attach the leakage transducer (5) to the pipe (1).
(h) Connect the leakage transducer cable (8) to the transmitter (9).
(i) Refer to the ground instruction manual of the ultrasonic flow meter to set:
- The serial number of the airplane
- The input location code on the ultrasonic flow meter to numeric code: 31437966 (Blue complete section).
(k) Monitor the flow on the ultrasonic flow meter display. It must not be more than 7.5 l.min (1.98 USgal.mn).
(l) If the internal leakage is more than 7.5 l.min (1.98 USgal.mn) do the measurements that follow to find the cause of the high internal leakage:
- Measure the internal leakage of the rear section of the Blue hydraulic system Para A.(4).
- Measure the internal leakage of the left wing section of the Blue hydraulic system Para A.(5).
- Measure the internal leakage of the right wing section of the Blue hydraulic system Para A.(6).
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to disconnect the leakage transducer (5) from the pipe (1).
2 Push the knurled screw (6) in and disconnect the fastening strap (4) from the strap clamp (7).
3 Remove the leakage transducer (5) from the pipe (1).
(n) Disconnect the leakage transducer cable (8) from the transmitter (9).
(4) Measure of the Blue hydraulic system (rear section) internal leakage with ultrasonic flow meter:
Blue Hydraulic System - Rear Section ** ON A/C NOT FOR ALL Blue Hydraulic System - Rear Section ** ON A/C NOT FOR ALL (b) Refer to the lower DU of the ECAM (HYD page) to make sure that the solenoid valve operation is correct (the flow arrow of the Blue hydraulic system is green and the system name is white).
(c) Refer to the ground instruction manual of the ultrasonic flow meter to make sure that the correct software is installed.
(d) Clean the tube (1) between the identification tapes (2) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(e) Remove the remaining acoustic coupling compound from the leakage transducer (5) with a Textile-Lint free Cotton - (Material No.14SBA1) . Do not use a detergent to clean the leakage transducer (5).
(f) Apply a thin layer of the acoustic coupling compound (part of USF FLUXUS GST 6108, 610007AB TOOL-MEASURE,HYDRAULIC FLOW) to the contact surfaces of the leakage transducer (5).
(g) Install the leakage transducer (5) between the identification tapes (2) on the pipe (1):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to the stop.
2 Put the leakage transducer (5) in position on the pipe (1) between the identification tapes (2) and push it tightly on the pipe (1).
3 Push the knurled screw (6) in and attach the fastening strap (4) around the pipe (1) with the thread element (3).
4 Put the fastening strap (4) through the upper slot of the strap clamp (7) and then through the lower one.
5 Make sure that the fastening strap (4) has the correct tension. And make sure that the knurled screw (6) is pushed in up to the stop.
6 Tighten the knurled screw (6) to attach the leakage transducer (5) to the pipe (1).
(h) Connect the leakage transducer cable (8) to the transmitter (9).
(i) Refer to the ground instruction manual of the ultrasonic flow meter to set:
- The serial number of the airplane
- The input location code on the ultrasonic flow meter to numeric code: 58765375 (Blue rear section).
(k) Monitor the flow on the ultrasonic flow meter display. It must not be more than 5.0 l.min (1.32 USgal.mn).
(l) If the internal leakage is more than 5.0 l.min (1.32 USgal.mn) do the steps in Para A.(7) to find the cause of the high internal leakage.
(m) Remove the leakage transducer (5):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to disconnect the leakage transducer (5) from the pipe (1).
2 Push the knurled screw (6) in and disconnect the fastening strap (4) from the strap clamp (7).
3 Remove the leakage transducer (5) from the pipe (1).
(n) Disconnect the leakage transducer cable (8) from the transmitter (9).
(5) Measurement of the Blue hydraulic system (left wing section) internal leakage with ultrasonic flow meter:
Blue Hydraulic System - Left Wing Section ** ON A/C NOT FOR ALL Blue Hydraulic System - Left Wing Section ** ON A/C NOT FOR ALL (b) Refer to the lower DU of the ECAM (HYD page) to make sure that the solenoid valve operation is correct (the flow arrow of the Blue hydraulic system is green and the system name is white).
(c) Refer to the ground instruction manual of the ultrasonic flow meter to make sure that the correct software is installed.
(d) Clean the tube (1) between the identification tapes (2) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(e) Remove the remaining acoustic coupling compound from the leakage transducer (5) with Textile-Lint free Cotton - (Material No.14SBA1) . Do not use a detergent to clean the leakage transducer (5).
(f) Apply a thin layer of the acoustic coupling compound (part of USF FLUXUS GST 6108, 610007AB TOOL-MEASURE,HYDRAULIC FLOW) to the contact surfaces of the leakage transducer (5).
(g) Install the leakage transducer (5) between the identification tapes (2) on the pipe (1):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to the stop.
2 Put the leakage transducer (5) in position on the pipe (1) between the identification tapes (2) and push it tightly on the pipe (1).
3 Push the knurled screw (6) in and attach the fastening strap (4) around the pipe (1) with the thread element (3).
4 Put the fastening strap (4) through the upper slot of the strap clamp (7) and then through the lower one.
5 Make sure that the fastening strap (4) has the correct tension. And make sure that the knurled screw (6) is pushed in up to the stop.
6 Tighten the knurled screw (6) to attach the leakage transducer (5) to the pipe (1).
(h) Connect the leakage transducer cable (8) to the transmitter (9).
(i) Refer to the ground instruction manual of the ultrasonic flow meter to set:
- The serial number of the airplane
- The input location code on the ultrasonic flow meter to numeric code: 55792798 (Blue left wing section).
(k) Monitor the flow on the ultrasonic flow meter display. It must not be more than 2.2 l.min (0.58 USgal.mn).
(l) If the internal leakage is more than 2.2 l.min (0.58 USgal.mn) do the steps in Para A.(7) to find the cause of the high internal leakage.
(m) Remove the leakage transducer (5):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to disconnect the leakage transducer (5) from the pipe (1).
2 Push the knurled screw (6) in and disconnect the fastening strap (4) from the strap clamp (7).
3 Remove the leakage transducer (5) from the pipe (1).
(n) Disconnect the leakage transducer cable (8) from the transmitter (9).
(6) Measure of the Blue hydraulic system (right wing section) internal leakage with ultrasonic flow meter:
Blue Hydraulic System - Right Wing Section ** ON A/C NOT FOR ALL Blue Hydraulic System - Right Wing Section ** ON A/C NOT FOR ALL (b) Refer to the lower DU of the ECAM (HYD page) to make sure that the solenoid valve operation is correct (the flow arrow of the Blue hydraulic system is green and the system name is white).
(c) Refer to the ground instruction manual of the ultrasonic flow meter to make sure that the correct software is installed.
(d) Clean the tube (1) between the identification tapes (2) with a Textile-Lint free Cotton - (Material No.14SBA1) .
(e) Remove the remaining acoustic compound from the leakage transducer (5) with a Textile-Lint free Cotton - (Material No.14SBA1) . Do not use a detergent to clean the leakage transducer (5).
(f) Apply a thin layer of the acoustic coupling compound (part of USF FLUXUS GST 6108, 610007AB TOOL-MEASURE,HYDRAULIC FLOW) to the contact surfaces of the leakage transducer (5).
(g) Install the leakage transducer (5) between the identification tapes (2) on the pipe (1):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to the stop.
2 Put the leakage transducer (5) in position on the pipe (1) between the identification tapes (2) and push it tightly on the pipe (1).
3 Push the knurled screw (6) in and attach the fastening strap (4) around the pipe (1) with the thread element (3).
4 Put the fastening strap (4) through the upper slot of the strap clamp (7) and then through the lower one.
5 Make sure that the fastening strap (4) has the correct tension. And make sure that the knurled screw (6) is pushed in up to the stop.
6 Tighten the knurled screw (6) to attach the leakage transducer (5) to the pipe (1).
(h) Connect the leakage transducer cable (8) to the transmitter (9).
(i) Refer to the ground instruction manual of the ultrasonic flow meter to set:
- The serial number of the airplane
- The input location code on the ultrasonic flow meter to numeric code: 39292361 (Blue right wing section).
(k) Monitor the flow on the ultrasonic flow meter display. It must not be more than 2.2 l.min (0.58 USgal.mn).
(l) If the internal leakage is more than 2.2 l.min (0.58 USgal.mn) do the steps in Para A.(7) to find the cause (s) of the high internal leakage.
(m) Remove the leakage transducer (5):
1 Hold the leakage transducer (5) and turn the knurled screw (6) counterclockwise to disconnect the leakage transducer (5) from the pipe (1).
2 Push the knurled screw (6) in and disconnect the fastening strap (4) from the strap clamp (7).
3 Remove the leakage transducer (5) from the pipe (1).
(n) Disconnect the leakage transducer cable (8) from the transmitter (9).
(7) Permitted leakage rates of the components and how to find the defective component
(a) The maximum permitted internal leakage for components related to the Blue hydraulic system is:
Aileron servocontrol: 1.5 l.min (0.39 USgal.mn)
Spoiler 3: 0.8 l.min (0.21 USgal.mn)
Elevator servocontrol: 1.5 l.min (0.39 USgal.mn)
Rudder servocontrol: 2.1 l.min (0.55 USgal.mn)
Slat PCU valve block: 0.2 l.min (0.05 USgal.mn)
RAT warm oil flow: 0.5 l.min (0.13 USgal.mn)
NOTE: The maximum leakage rates for components are given to help in trouble shooting. The total leakage of components in a section (left wing, right wing etc) of the system must be less than the leakage permitted for that section. Also, the sum of all leakages of all the sections must not be more than the leakage permitted for the full system.
(b) If the internal leakage rate is too high you can find the defective component if you: 1 Listen to the pipes and components which may be the cause.
2 Touch the pipes and components, a high leakage rate will cause an increase in their temperature.
CAUTION:
DO NOT DISCONNECT AND CAP THE RETURN LINE FROM A SERVOCONTROL TO DO A LEAKAGE CHECK. IF A SUPPLY OF SYSTEM PRESSURE GETS TO THE SERVOCONTROL IT CAN CAUSE DAMAGE IF THERE IS NO RETURN FLOW.
(c) If you think that a servocontrol is the cause, disconnect and cap the supply to the servocontrol. Do the test again and if the leakage rate is in limits, the servocontrol is the defective component. Subtask 29-00-00-860-055-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to the serviceable condition.
(1) On overhead maintenance panel 50VU, lift the guard and set the HYD/LEAK MEASUREMENT VALVES/B P/BSW to on. Make sure that the OFF light goes off.
(2) Refer to the lower DU of the ECAM (HYD page) and make sure that the solenoid valve has operated correctly (the flow arrow of the Blue hydraulic system is colored green and the system name is colored white).
(3) Depressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).
(4) Disconnect the ground hydraulic supply from the aircraft ground test connections.
(5) Install the blanking caps on the ground test connections.
(6) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(7) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
Subtask 29-00-00-410-054-A ** ON A/C NOT FOR ALL (1) On overhead maintenance panel 50VU, lift the guard and set the HYD/LEAK MEASUREMENT VALVES/B P/BSW to on. Make sure that the OFF light goes off.
(2) Refer to the lower DU of the ECAM (HYD page) and make sure that the solenoid valve has operated correctly (the flow arrow of the Blue hydraulic system is colored green and the system name is colored white).
(3) Depressurize the Blue hydraulic system (Ref. AMM TASK 29-10-00-864-003).
(4) Disconnect the ground hydraulic supply from the aircraft ground test connections.
(5) Install the blanking caps on the ground test connections.
(6) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(7) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access doors 195BB 197EB.
Subtask 29-00-00-860-055-B ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access doors 195BB 197EB.
C. Put the aircraft back to the serviceable condition.
(1) On overhead maintenance panel 50VU, lift the guard and set the HYD/LEAK MEASUREMENT VALVES/B P/BSW to ON. Make sure that the OFF light goes off.
(2) Refer to the lower DU of the ECAM (HYD page) and make sure that the solenoid valve operates correctly (the flow arrow of the Blue hydraulic system is green and the system name is white).
(3) Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).
(4) If an ultrasonic flow meter was not used, disconnect the ground hydraulic supply from the aircraft ground test connections.
(5) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(6) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
Subtask 29-00-00-410-054-B ** ON A/C NOT FOR ALL (1) On overhead maintenance panel 50VU, lift the guard and set the HYD/LEAK MEASUREMENT VALVES/B P/BSW to ON. Make sure that the OFF light goes off.
(2) Refer to the lower DU of the ECAM (HYD page) and make sure that the solenoid valve operates correctly (the flow arrow of the Blue hydraulic system is green and the system name is white).
(3) Depressurize the Blue hydraulic system
(Ref. AMM TASK 29-10-00-864-003).
(4) If an ultrasonic flow meter was not used, disconnect the ground hydraulic supply from the aircraft ground test connections.
(5) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(6) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access door 195BB.
(3) If necessary, close access door 197EB.
Subtask 29-00-00-865-054-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close access door 195BB.
(3) If necessary, close access door 197EB.