Deactivation of the Reservoir Quantity Indication of the Yellow Hydraulic System on the ECAM

TASK 29-31-00-040-002-A
Deactivation of the Reservoir Quantity Indication of the Yellow Hydraulic System on the ECAM

Task Summary

Access	Test	Specific Tools	Mhr	E/T	Nb Men
YES	NO	NO	1.0	1.0	1

1. Reason for the Job
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)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
196BB

C. Referenced Information

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 29-10-00-680-002-A	Drainage of the Reservoir of 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 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TSM 29-13-00-810-801	Loss of the Correct Quantity in the Yellow Hydraulic Reservoir

3. Job Set-up
Subtask 29-31-00-010-053-A

A. Get Access
(1) Open the access door 196BB.
(2) Open the RH main door of the main gear (Ref. AMM TASK 32-12-00-010-001).
(3) Do the troubleshooting procedure to check if the fault of the quantity indicator is electrical or mechanical TSM 29-13-00-810-801.

Subtask 29-31-00-865-054-A

B. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	HYDRAULIC/HYD/QTY/IND	1831GQ	P35

4. Procedure
Subtask 29-31-00-040-054-A

A. Deactivation of the Reservoir Quantity Indication of the Yellow Hydraulic System
(1) Release the transmitter cable from the two P-clips nearest to the reservoir end of the cable.
(2) Put the P-clips back in position on their brackets after you have released the cable.
(3) Disconnect the electrical connector 3000GQ-A from the quantity transmitter of the reservoir.
(4) Install a CAP - PROTECTION in the connector and the receptacle.
(5) Put the connector through the hole in the top of the rear wall (FR42) of the Yellow hydraulic compartment.
(6) Use a TIE WRAP(S) to attach the connector and the cable to the structure in the main gear compartment.

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.

Subtask 29-31-00-040-052-A

B. Electrical Failure of the Quantity Indicator
(1) Examine the mechanical indicator on the 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:

The thrust reverser for the right engine OFF (closed)
The speedbrakes and the spoilers retracted
Yellow power accumulator empty of fluid and filled with nitrogen to the correct pressure
Forward and aft cargo-compartment doors closed.

1 Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
2 Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
3 Drain the Yellow reservoir until the low level warning comes on (Ref. AMM TASK 29-10-00-680-002). Keep the air pressure in the reservoir at not less than 22 psig (1.5 bar relative) while you drain the fluid.
4 Put the fluid into the Yellow reservoir to fill it to its correct fill level (Ref. AMM TASK 12-12-29-611-001).
(3) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(5) Make an entry in the logbook.

Subtask 29-31-00-040-056-A

C. Mechanical Failure of the Quantity Indicator
(1) Make sure that the aircraft configuration is:

The thrust reverser for the right engine is off (closed)
The speedbrakes and the spoilers retracted
Yellow power accumulator empty of fluid and filled with nitrogen to the correct pressure
Forward and aft cargo-compartment doors closed.

(2) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(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 Yellow reservoir until the low level warning comes on (Ref. AMM TASK 29-10-00-680-002). Keep the air pressure in the reservoir at not less than 22 psig (1.5 bar relative) while you drain the fluid.
(5) Put the fluid into the Yellow reservoir to fill it to its correct fill level (Ref. AMM TASK 12-12-29-611-001).
The quantity of fluid which it is necessary to add is:

With the brake accumulator empty of fluid but filled with nitrogen to the correct pressure: 12 l (3.2 USgal)
With the brake accumulator full of fluid at the system pressure of 206 bar (3000 psi): 9 l (2.4 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 0.5 l (0.13 USgal) for each 10 deg. C (18 deg. F).

(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).
(8) Make an entry in the logbook.

5. Close-up
Subtask 29-31-00-865-061-A

A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	HYDRAULIC/HYD/QTY/IND	1831GQ	P35

Subtask 29-31-00-410-054-A

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the RH main door of the main gear (Ref. AMM TASK 32-12-00-410-001).
(3) Close the access door 196BB.

[Rev.10 from 2021] 2026.04.01 00:27:25 UTC