DOC AIRBUS | AMM A320FDeactivation of the Hand Pump
TASK 52-36-00-040-002-A
Deactivation of the Hand Pump
1. Reason for the Job
MMEL 52-30-05A
CARGO DOOR HAND PUMP (FAA ONLY)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 52-36-00-010-054-A
Subtask 52-36-00-040-051-A
Subtask 52-36-00-410-053-A
[Rev.10 from 2021]
2026.04.02 06:28:10 UTC
Deactivation of the Hand Pump
1. Reason for the Job
MMEL 52-30-05A
CARGO DOOR HAND PUMP (FAA ONLY)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | 1 | CONTAINER 5 L (1.32 USGAL) |
| No specific | AR | PLUG - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | 1 | WARNING NOTICE(S) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 198CB, 198DB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-12-29-611-001-A | Fill the Hydraulic Fluid Reservoir with a Hand Pump |
| TASK 29-00-00-910-002-A | Safety Procedures of the Hydraulic System |
| TASK 29-10-00-863-002-A | Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart |
| TASK 29-10-00-864-002-A | Depressurize the Yellow Hydraulic System |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 29-14-00-614-002-A | Pressurization of the Hydraulic Reservoirs through the Ground Connector |
| TASK 29-14-00-614-002-A-01 | Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU) |
| TASK 52-30-00-860-002-A | Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
Hand PumpSubtask 52-36-00-010-054-A
A. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the Yellow ground service panel.
(2) Open the access door 198CB to get access to the hand pump.
(3) Remove the access panel 198DB to get access to the hydraulic connections of the hand pump.
Subtask 52-36-00-865-056-A (1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position below the Yellow ground service panel.
(2) Open the access door 198CB to get access to the hand pump.
(3) Remove the access panel 198DB to get access to the hydraulic connections of the hand pump.
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 52-36-00-860-057-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N30 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N31 |
| ** ON A/C ALL | |||
| 122VU | DOORS/CARGO | 1MJ | T12 |
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
C. Aircraft Maintenance Configuration
(1) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
(2) Depressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(3) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system:
(5) Push the PTU P/B switch on the overhead panel 40VU to prevent the unwanted operation of the power transfer unit.
(6) Put a CONTAINER 5 L (1.32 USGAL) below the hydraulic connections of the hand pump to collect hydraulic fluid.
4. Procedure(1) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
(2) Depressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(3) Put WARNING NOTICE(S) in position to tell persons not to pressurize the Yellow hydraulic system:
- In the cockpit on the hydraulic section 40VU of the overhead panel
- On the ground service panel of the Yellow hydraulic system.
(5) Push the PTU P/B switch on the overhead panel 40VU to prevent the unwanted operation of the power transfer unit.
(6) Put a CONTAINER 5 L (1.32 USGAL) below the hydraulic connections of the hand pump to collect hydraulic fluid.
Subtask 52-36-00-040-051-A
A. Deactivation of the Handpump
(2) Loosen the union nut (6) from the union (5) and carefully disconnect the pressure line (7) from the port "A" of the hand pump (4).
(3) Put the PLUG-BLANKING in each disconnected line end.
(4) Put blanking caps on the ports "A" and "C" of the hand pump (4) to prevent all contamination.
Subtask 52-36-00-865-057-A CAUTION:
USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.
(1) Loosen the union nut (2) from the union (3) and carefully disconnect the suction line (1) from the port "C" of the hand pump (4). (2) Loosen the union nut (6) from the union (5) and carefully disconnect the pressure line (7) from the port "A" of the hand pump (4).
(3) Put the PLUG-BLANKING in each disconnected line end.
(4) Put blanking caps on the ports "A" and "C" of the hand pump (4) to prevent all contamination.
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 52-36-00-860-058-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N30 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N31 |
| ** ON A/C ALL | |||
| 122VU | DOORS/CARGO | 1MJ | T12 |
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
C. Preparation for the Test
(1) Remove the warning notices from the overhead panel of the cockpit.
(2) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(3) Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-863-002).
(4) Push the PTU P/B switch on the overhead panel 40VU to activate the power transfer unit.
Subtask 52-36-00-790-052-A (1) Remove the warning notices from the overhead panel of the cockpit.
(2) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(3) Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-863-002).
(4) Push the PTU P/B switch on the overhead panel 40VU to activate the power transfer unit.
D. Leak Check of the Door Hydraulic System
(1) Turn the selector of the service panel to the OPEN position and hold it until the cargo door is fully opened.
(2) Turn the selector of the service panel to the CLOSE position and hold it until the cargo door is closed.
(3) Open and close the cargo door ten times to bleed the door hydraulic system.
(4) Do a visual inspection to make sure that there are no leaks at the disconnected hydraulic lines.
(5) Examine the level of the Yellow reservoir on the HYD page of the lower display unit of the ECAM system. If necessary, fill the Yellow reservoir (Ref. AMM TASK 12-12-29-611-001).
5. Close-up(1) Turn the selector of the service panel to the OPEN position and hold it until the cargo door is fully opened.
(2) Turn the selector of the service panel to the CLOSE position and hold it until the cargo door is closed.
(3) Open and close the cargo door ten times to bleed the door hydraulic system.
(4) Do a visual inspection to make sure that there are no leaks at the disconnected hydraulic lines.
(5) Examine the level of the Yellow reservoir on the HYD page of the lower display unit of the ECAM system. If necessary, fill the Yellow reservoir (Ref. AMM TASK 12-12-29-611-001).
Subtask 52-36-00-410-053-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the container.
(3) Make sure that the FWD or AFT cargo door is correctly closed (Ref. AMM TASK 52-30-00-860-002).
(4) Install the access panel 198DB.
(5) Close the access door 198CB of the Yellow ground service panel.
(6) Remove the access platform(s).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the container.
(3) Make sure that the FWD or AFT cargo door is correctly closed (Ref. AMM TASK 52-30-00-860-002).
(4) Install the access panel 198DB.
(5) Close the access door 198CB of the Yellow ground service panel.
(6) Remove the access platform(s).