DOC AIRBUS | AMM A320FDeactivation of the Reservoir Quantity Indication of the Green and Blue Hydraulic Systems on the ECAM
TASK 29-31-00-040-001-A
Deactivation of the Reservoir Quantity Indication of the Green and Blue Hydraulic Systems on the ECAM
MMEL 29-07-05A
RESERVOIR QUANTITY INDICATION ON THE HYD SD PAGE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 29-31-00-010-050-A
Subtask 29-31-00-040-053-A
Subtask 29-31-00-865-060-A
[Rev.10 from 2021]
2026.04.01 00:27:23 UTC
Deactivation of the Reservoir Quantity Indication of the Green and Blue Hydraulic Systems on the ECAM
Task Summary
1. Reason for the Job| Access | Test | Specific Tools | Mhr | E/T | Nb Men |
|---|---|---|---|---|---|
| NO | YES | NO | 0.7 | 0.8 | 2 |
MMEL 29-07-05A
RESERVOIR QUANTITY INDICATION ON THE HYD SD PAGE
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 2 | CAP - PROTECTION |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | AR | TIE WRAP(S) |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-12-29-611-001-A | Fill the Hydraulic Fluid Reservoir with a Hand Pump |
| 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 29-10-00-680-001-A | Drainage of the Reservoir of the Green Hydraulic System |
| TASK 29-10-00-680-003-A | Drainage of the Reservoir of the Blue Hydraulic System |
| TASK 31-60-00-860-001-A | EIS Start Procedure |
| TASK 31-60-00-860-002-A | EIS Stop Procedure |
| 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 |
| TSM 29-11-00-810-803 | Loss of the Correct Quantity in the Green Hydraulic Reservoir |
| TSM 29-12-00-810-803 | Loss of the Correct Quantity in the Blue Hydraulic Reservoir |
Subtask 29-31-00-010-050-A
A. Get Access
(1) Open the access door for the reservoir it is necessary to deactivate
(a) For the Green reservoir:
Subtask 29-31-00-865-050-A (1) Open the access door for the reservoir it is necessary to deactivate
(a) For the Green reservoir:
- Open one main-gear main door (Ref. AMM TASK 32-12-00-010-001)
NOTE: You can open one of the two doors, but access is good from the RH side.
(b) For the Blue reservoir: - Open the access door 197FB.
- For the Green reservoir TSM 29-11-00-810-803
- For the Blue reservoir TSM 29-12-00-810-803.
B. Open, safety and tag this(these) circuit breaker(s):
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/HYD/QTY/IND | 1831GQ | P35 |
Subtask 29-31-00-040-053-A
A. Deactivation of the Reservoir Quantity Indication of the Green and Blue Hydraulic Systems
(1) Disconnect the applicable electrical connector 1000GQ-A or 2000GQ-A from the quantity transmitter of the related reservoir.
(2) Install a CAP - PROTECTION in the connector and the receptacle.
(3) Use a TIE WRAP(S) and secure the cable to a part of the structure.
Subtask 29-31-00-040-050-A (1) Disconnect the applicable electrical connector 1000GQ-A or 2000GQ-A from the quantity transmitter of the related reservoir.
(2) Install a CAP - PROTECTION in the connector and the receptacle.
(3) Use a TIE WRAP(S) and secure the cable to a part of the structure.
NOTE: Attach the cable to the structure so that the disconnected end of the connector points down. Oil or other liquids can not then enter the connector.
B. Electrical Failure of the Quantity Indicator
(1) Examine the mechanical indicator on the applicable reservoir to check the quantity of the hydraulic fluid. Do this before each flight.
(2) Do a check of the LO LVL ECAM warning. Do this check only before the first flight of the aircraft under this MMEL item.
(a) Make sure that the aircraft configuration is:
1 For deactivation of the Green reservoir indication:
4 Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
5 Drain the applicable reservoir until the low level warning comes on (Ref. AMM TASK 29-10-00-680-001) or (Ref. AMM TASK 29-10-00-680-003). Keep the air pressure in the reservoir at more than 22 psig (1.5 bar relative) while you drain the reservoir.
6 Put fluid into the reservoir to fill it to its correct fill level (Ref. AMM TASK 12-12-29-611-001).
7 Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
8 De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
9 Make an entry in the logbook.
Subtask 29-31-00-040-055-A (1) Examine the mechanical indicator on the applicable reservoir to check the quantity of the hydraulic fluid. Do this before each flight.
(2) Do a check of the LO LVL ECAM warning. Do this check only before the first flight of the aircraft under this MMEL item.
(a) Make sure that the aircraft configuration is:
1 For deactivation of the Green reservoir indication:
- The landing gear extended with the landing gear doors closed (one main door of the main gear can be open)
- The thrust reverser for the left engine is off (closed)
- The speedbrakes and the spoilers are retracted
- Green power accumulator empty of fluid and filled with nitrogen to the correct pressure.
- The speedbrakes and the spoilers are retracted
- Blue power accumulator empty of fluid and filled with nitrogen to the correct pressure.
4 Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
5 Drain the applicable reservoir until the low level warning comes on (Ref. AMM TASK 29-10-00-680-001) or (Ref. AMM TASK 29-10-00-680-003). Keep the air pressure in the reservoir at more than 22 psig (1.5 bar relative) while you drain the reservoir.
6 Put fluid into the reservoir to fill it to its correct fill level (Ref. AMM TASK 12-12-29-611-001).
7 Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
8 De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
9 Make an entry in the logbook.
C. Mechanical Failure of the Quantity Indicator
(1) Make sure that the aircraft configuration is:
(a) For deactivation of the Green reservoir indication:
(3) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(4) Drain the applicable reservoir until the low level warning comes on (Ref. AMM TASK 29-10-00-680-001) or (Ref. AMM TASK 29-10-00-680-003). Keep the air pressure in the reservoir at more than 22 psig (1.5 bar relative) while you drain the reservoir.
(5) Put fluid into the reservoir to fill it to its correct fill level (Ref. AMM TASK 12-12-29-611-001).
The quantity of fluid which is necessary to add is:
(Ref. AMM TASK 31-60-00-860-002).
(7) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(8) Make an entry in the logbook.
5. Close-up(1) Make sure that the aircraft configuration is:
(a) For deactivation of the Green reservoir indication:
- The landing gear extended with the landing gear doors closed (one main door of the main gear can be open)
- The thrust reverser for the left engine is off (closed)
- The speedbrakes and the spoilers are retracted
- Green power accumulator empty of fluid and filled with nitrogen to the correct pressure.
- The speedbrakes and the spoilers are retracted
- Blue power accumulator empty of fluid and filled with nitrogen to the correct pressure.
(3) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(4) Drain the applicable reservoir until the low level warning comes on (Ref. AMM TASK 29-10-00-680-001) or (Ref. AMM TASK 29-10-00-680-003). Keep the air pressure in the reservoir at more than 22 psig (1.5 bar relative) while you drain the reservoir.
(5) Put fluid into the reservoir to fill it to its correct fill level (Ref. AMM TASK 12-12-29-611-001).
The quantity of fluid which is necessary to add is:
- For the Green reservoir: 11 l (2.9 USgal)
- For the Blue reservoir: 4 l (1.05 USgal).
NOTE: These quantities are for fluid temperatures between 10 and 20 deg. C (50 and 68 deg. F). If the temperature is not in these limits, the quantity of fluid necessary changes by:
(6) Do the EIS stop procedure- 0.5 l (0.13 USgal) for each 10 deg. C (18 deg. F) for the Green reservoir
- 0.25 l (0.065 USgal) for each 10 deg. C (18 deg. F) for the Blue reservoir.
(Ref. AMM TASK 31-60-00-860-002).
(7) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(8) Make an entry in the logbook.
Subtask 29-31-00-865-060-A
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 29-31-00-410-050-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/HYD/QTY/IND | 1831GQ | P35 |
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door as applicable:
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access door as applicable:
- 197FB or
- the main door of the main gear (Ref. AMM TASK 32-12-00-410-001).