DOC AIRBUS | AMM A320FReactivation of the Drain Valves of the Green, Yellow and Blue Hydraulic Reservoirs
TASK 29-10-00-440-007-A
Reactivation of the Drain Valves of the Green, Yellow and Blue Hydraulic Reservoirs
MMEL 29-10-10A
HYDRAULIC RESERVOIR DRAIN VALVE
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 29-10-00-860-130-A
Subtask 29-10-00-440-054-A
Subtask 29-10-00-860-131-A
[Rev.10 from 2021]
2026.04.01 00:13:50 UTC
Reactivation of the Drain Valves of the Green, Yellow and Blue Hydraulic Reservoirs
WARNING:
OBEY THE HYDRAULIC SAFETY PROCEDURES.
WARNING:
PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
1. Reason for the Job- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
MMEL 29-10-10A
HYDRAULIC RESERVOIR DRAIN VALVE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CONTAINER - HYDRAULIC FLUID RESISTANT |
| No specific | 1 | WRENCH - SPANNER, FLAT |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 147 | MAIN GEAR WELL AND HYDRAULIC COMPARTMENT |
| 190 | BELLY FAIR, AIR CONDITIONING & HYD COMPT |
| 196 | HYDRAULIC COMPT AND FAIRINGS |
| 191GB, 196BB, 197EB |
| 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 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 29-00-00-910-002-A | Safety Procedures of the Hydraulic System |
| TASK 29-11-41-000-004-A | Removal of the Drain Valve of the Green Hydraulic Reservoir |
| TASK 29-11-41-400-004-A | Installation of the Drain Valve of the Green Hydraulic Reservoir |
| TASK 29-12-35-000-001-A | Removal of the Reservoir Drain Valve |
| TASK 29-12-35-400-001-A | Installation of the Reservoir Drain Valve |
| TASK 29-13-41-000-005-A | Removal of the Drain Valve of the Yellow Reservoir |
| TASK 29-13-41-400-005-A | Installation of the Drain Valve of the Yellow Reservoir |
| TASK 29-14-00-614-002-A | Pressurization of the Hydraulic Reservoirs through the Ground Connector |
| TASK 29-14-00-614-002-A-01 | Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU) |
| TASK 32-12-00-010-001-A | Open the Main Gear Doors for Access |
| TASK 32-12-00-410-001-A | Close the Main Gear Doors after Access |
Drain Valve of the Green Hydraulic ReservoirSubtask 29-10-00-860-130-A
A. Aircraft Maintenance Configuration
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(3) Put the CONTAINER - HYDRAULIC FLUID RESISTANT below the related drain valve.
Subtask 29-10-00-010-099-A (1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).
(3) Put the CONTAINER - HYDRAULIC FLUID RESISTANT below the related drain valve.
B. Get Access
(1) Open the related service panel doors:
(a) For the Yellow hydraulic drain valve: 196BB.
(b) For the Green hydraulic drain valve: right MLG door (Ref. AMM TASK 32-12-00-010-001).
(c) For the Blue hydraulic drain valve: 197EB.
(2) Open Electrical Service Panel door 191GB and set the HYD COMPT WHEEL WELL LIGHT to the ON position.
4. Procedure(1) Open the related service panel doors:
(a) For the Yellow hydraulic drain valve: 196BB.
(b) For the Green hydraulic drain valve: right MLG door (Ref. AMM TASK 32-12-00-010-001).
(c) For the Blue hydraulic drain valve: 197EB.
(2) Open Electrical Service Panel door 191GB and set the HYD COMPT WHEEL WELL LIGHT to the ON position.
Subtask 29-10-00-440-054-A
A. Reactivation of the Drain Valve of the Green Hydraulic Reservoir
(1) Use the WRENCH - SPANNER, FLAT to hold the drain valve (1) in position.
(2) Remove the cap (2) from the drain valve (1).
(3) Replace the drain valve (1) (Ref. AMM TASK 29-11-41-000-004) (Ref. AMM TASK 29-11-41-400-004).
Subtask 29-10-00-440-055-A (1) Use the WRENCH - SPANNER, FLAT to hold the drain valve (1) in position.
(2) Remove the cap (2) from the drain valve (1).
(3) Replace the drain valve (1) (Ref. AMM TASK 29-11-41-000-004) (Ref. AMM TASK 29-11-41-400-004).
B. Reactivation of the Drain Valve of the Blue Hydraulic Reservoir
(1) Use the WRENCH - SPANNER, FLAT to hold the drain valve (1) in position.
(2) Remove the cap (2) from the drain valve (1).
(3) Replace the drain valve (1) (Ref. AMM TASK 29-12-35-000-001) (Ref. AMM TASK 29-12-35-400-001).
Subtask 29-10-00-440-056-A (1) Use the WRENCH - SPANNER, FLAT to hold the drain valve (1) in position.
(2) Remove the cap (2) from the drain valve (1).
(3) Replace the drain valve (1) (Ref. AMM TASK 29-12-35-000-001) (Ref. AMM TASK 29-12-35-400-001).
C. Reactivation of the Drain Valve of the Yellow Hydraulic Reservoir
(1) Use the WRENCH - SPANNER, FLAT to hold the drain valve (1) in position.
(2) Remove the cap (2) from the drain valve (1).
(3) Replace the drain valve (1) (Ref. AMM TASK 29-13-41-000-005) (Ref. AMM TASK 29-13-41-400-005).
Subtask 29-10-00-790-065-A (1) Use the WRENCH - SPANNER, FLAT to hold the drain valve (1) in position.
(2) Remove the cap (2) from the drain valve (1).
(3) Replace the drain valve (1) (Ref. AMM TASK 29-13-41-000-005) (Ref. AMM TASK 29-13-41-400-005).
D. Test(s)
(1) Put the related hydraulic system back to its initial configuration (Ref. AMM TASK 29-00-00-864-001).
(2) Pressurize the reservoirs of the hydraulic systems.
(Ref. AMM TASK 29-14-00-614-002).
(3) Make sure that fluid level in the reservoirs of the hydraulic systems is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(4) Make sure that there are no leaks form the connections of the Green, Blue and Yellow reservoirs drain valves (1).
5. Close-up(1) Put the related hydraulic system back to its initial configuration (Ref. AMM TASK 29-00-00-864-001).
(2) Pressurize the reservoirs of the hydraulic systems.
(Ref. AMM TASK 29-14-00-614-002).
(3) Make sure that fluid level in the reservoirs of the hydraulic systems is correct. Add fluid as necessary (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
(4) Make sure that there are no leaks form the connections of the Green, Blue and Yellow reservoirs drain valves (1).
Subtask 29-10-00-860-131-A
A. Put the aircraft back to the serviceable condition.
(1) Remove the containers.
Subtask 29-10-00-410-097-A (1) Remove the containers.
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the related service panel doors:
(a) For the Yellow hydraulic drain valve: 196BB.
(b) For the Green hydraulic drain valve: right MLG door (Ref. AMM TASK 32-12-00-410-001).
(c) For the Blue hydraulic drain valve: 197EB.
(3) Set the HYD COMPT WHEEL WELL LIGHT switch to the OFF position.
(4) Close Electrical Service Panel door 191GB.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the related service panel doors:
(a) For the Yellow hydraulic drain valve: 196BB.
(b) For the Green hydraulic drain valve: right MLG door (Ref. AMM TASK 32-12-00-410-001).
(c) For the Blue hydraulic drain valve: 197EB.
(3) Set the HYD COMPT WHEEL WELL LIGHT switch to the OFF position.
(4) Close Electrical Service Panel door 191GB.