Operational Check of Landing Gear Selector Valve with Aircraft on Ground

TASK 32-31-00-710-012-A
Operational Check of Landing Gear Selector Valve with Aircraft on Ground

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

1. Reason for the Job
To check the BITE fault message LGCIU 05GA/L/G SEL VALVE 40GA with the aircraft weight on wheels.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	GROUND POWER UNIT - ELECTRICAL
No specific	AR	SAFETY BARRIER(S)
No specific	1	WARNING NOTICE(S)
460005835	2	SLEEVE - GROUND LOCK
98D32203502000	2	SAFETY PIN - NLG DOOR
98F32304000000	6	TARGET-FALSE

B. Referenced Information

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 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 31-32-00-860-009-A	Procedure to Get Access to the SYSTEM REPORT/TEST/L/G Page
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-00-00-481-002-A	Installation of the Safety Devices on the Landing Gear Doors
TASK 32-00-00-860-001-A	Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01	Flight Configuration Precautions without Electrical Power
TASK 32-00-00-860-002-A	Ground Configuration after Flight Configuration with Electrical Power
TASK 32-00-00-860-002-A-01	Ground Configuration after Flight Configuration without Electrical Power
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
TASK 32-22-00-010-001-A	Nose Gear Doors - Ground Doors Opening
TASK 32-22-00-410-001-A	Nose Gear Doors - Ground Doors Closing
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-004-A	Close the FWD or Aft Cargo-Compartment Door with the Hand Pump
TASK 52-30-00-860-009-A	Close the FWD or Aft Cargo-Compartment Door with the Crane
TSM 32-31-00-810-883	L/G - Gear Selector Valve or Door Selector Valve Fault

3. Job Set-up
Subtask 32-31-00-941-094-A

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Install the safety locks in position on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On the panel 400VU:

Make sure that the landing-gear control lever 6GA is in the DOWN position
Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear.

Subtask 32-31-00-860-113-A

B. Aircraft Maintenance Configuration
(1) Make sure that the cargo doors are closed (Ref. AMM TASK 52-30-00-860-002) or (Ref. AMM TASK 52-30-00-860-004) or (Ref. AMM TASK 52-30-00-860-009).
(2) Make sure that the electrical power is de-energized (Ref. AMM TASK 24-41-00-862-002).
(3) Make sure that the hydraulic power is depressurized (Ref. AMM TASK 29-00-00-864-001).
(4) Do the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
(5) Install a 98F32304000000 TARGET-FALSE on:
(a) The NLG extension proximity sensors 24GA and 25GA.
(b) The MLG extension proximity sensors:

For the LH MLG 21GA and 23GA
For the RH MLG 20GA and 22GA.

Subtask 32-31-00-010-085-A

C. Get Access
(1) Open the NLG doors (Ref. AMM TASK 32-22-00-010-001).
(2) Make sure that a 98D32203502000 SAFETY PIN - NLG DOOR is installed in each NLG door (Ref. AMM TASK 32-00-00-481-002).
(3) Open the MLG doors (Ref. AMM TASK 32-12-00-010-001).
(4) Make sure that a 460005835 SLEEVE - GROUND LOCK is installed on each MLG door actuating cylinder (Ref. AMM TASK 32-00-00-481-002).

Subtask 32-31-00-865-137-A

D. Table of the circuit breakers referred to in this procedure:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
** ON A/C NOT FOR ALL
121VU	LGCIU/BAT SPLY/SYS2	59GA	R33
121VU	LGCIU/BAT SPLY/SYS1	58GA	R32
** ON A/C ALL
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	LGCIU/BAT SPLY/SYS2	59GA	R32
121VU	LGCIU/BAT SPLY/SYS1	58GA	R31

4. Procedure
Subtask 32-31-00-860-114-A

A. Get LGCIU1(2) Ground Scanning and Trouble Shooting Data pages from the MCDU
(1) Energize the aircraft electrical circuits with a GROUND POWER UNIT - ELECTRICAL (Ref. AMM TASK 24-41-00-861-002). You must not use the APU to do this.
(2) Get access to the System Report/Test/L/G page (Ref. AMM TASK 31-32-00-860-009).
(3) Get access to the Ground Scanning and Trouble Shooting Data pages as follows:

ACTION	RESULT
Push the line key adjacent to the LGCIU1 indication.	The LGCIU1 page comes into view.
Push the line key adjacent to the GROUND SCANNING indication.	The LGCIU1 GROUND SCANNING page comes into view.
Push the line key adjacent to the PRINT indication.
Push the line key adjacent to the RETURN indication.	The LGCIU1 page comes into view.
Push the line key adjacent to the TROUBLE SHOOTING DATA indication.	The LGCIU1 TROUBLE SHOOTING DATA page comes into view.
Push the line key adjacent to the PRINT indication.

(4) If the message LGCIU 05GA1(2)/L/G SEL VALVE 40GA is shown, you must record the fault counter CNT on the TROUBLE SHOOTING DATA page.
(5) Do steps (2) thru (4) again for LGCIU2.

Subtask 32-31-00-710-066-B

B. Operational Check of the L/G Selector Valve 40GA

NOTE: The hydraulic power must be depressurized before you do this test (view the ECAM HYDRAULIC page).

(1) Do this test:

ACTION	RESULT
1.Open the circuit breakers 2GA and 59GA.	The LGCIU2 is set to off.
2.Push the WHEEL pushbutton switch.	The WHEEL page indications from LGCIU1 are shown.
3.Use the ECAM WHEEL page to make sure that the landing gear doors are fully open.
4.On panel 400VU: Set the landing-gear control lever 6GA to the UP position.	This shows the false targets have caused the LGCIU1 to release the selector lever baulk solenoid.
5.On panel 400VU: Set the landing-gear control lever 6GA to the DOWN position.
6.Open the circuit breakers 1GA, 52GA and 58GA.	The LGCIU1 is set to off.
7.Close the circuit breakers 2GA and 59GA.	- The LGCIU2 is set to on - The WHEEL page indications now come from LGCIU2.
8.Use the ECAM WHEEL page to make sure that the landing gear doors are fully open.
9.On panel 400VU: Set the landing-gear control lever 6GA to the UP position.	This shows the false targets have caused the LGCIU2 to release the selector lever baulk solenoid.
10.On panel 400VU: Move the landing-gear control lever 6GA to the DOWN position.	At this time LGCIU2 is in control.
11.Close the circuit breakers 1GA, 52GA and 58GA.	The LGCIU 1 is set to on.
12.On panel 400VU: Set the landing-gear control lever 6GA to the UP position.	At this time LGCIU1 is in control.
13.On panel 400VU: Set the landing-gear control lever 6GA to the DOWN position.
14.Do steps 12 and 13 with LGCIU2.	At this time LGCIU2 is in control.
15.Reset LGCIU1.
16.Reset LGCIU2.	Control faults that were caused will be cleared.
17.On panel 400VU: Set the landing-gear control lever 6GA to the UP position.	At this time LGCIU2 is in control.
18.On panel 400VU: Set the landing-gear control lever 6GA to the DOWN position.	At this time LGCIU2 is in control.

Subtask 32-31-00-860-115-A

C. Get LGCIU1(2) Ground Scanning and Trouble Shooting Data pages from the MCDU
(1) Get access to the System Report/Test/L/G page (Ref. AMM TASK 31-32-00-860-009).
(2) Get access to the Ground Scanning and Trouble Shooting Data pages as follows:

ACTION	RESULT
Push the line key adjacent to the LGCIU1 indication.	The LGCIU1 page comes into view.
Push the line key adjacent to the GROUND SCANNING indication.	The LGCIU1 GROUND SCANNING page comes into view.
Push the line key adjacent to the PRINT indication.
Push the line key adjacent to the RETURN indication.	The LGCIU1 page comes into view.
Push the line key adjacent to the TROUBLE SHOOTING DATA indication.	The LGCIU1 TROUBLE SHOOTING DATA page comes into view.
Push the line key adjacent to the PRINT indication.

(3) Do steps (1) and (2) again for LGCIU2.
(4) Compare these results with the results from para.4.A. steps (2) thru (5).
(5) If the message LGCIU 05GA1(2)/L/G SEL VALVE 40GA is not shown, it is possible the PFR was incorrect.
(6) If one of these two faults occur do TSM TASK 32-31-00-810-883 TSM 32-31-00-810-883:

The message LGCIU 05GA1(2)/L/G SEL VALVE 40GA is shown
or
The counter CNT has increased since Para.4.A. step (4).

5. Close-up
Subtask 32-31-00-860-116-A

A. Aircraft Maintenance Configuration
(1) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(2) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(3) Remove the false targets from:
(a) The NLG extension proximity sensors 24GA and 25GA.
(b) The MLG extension proximity sensors:

For the LH MLG 21GA and 23GA
For the RH MLG 20GA and 22GA.

Subtask 32-31-00-410-078-A

B. Close Access
(1) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
(2) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).

Subtask 32-31-00-869-117-A

C. Ground Configuration after Flight Configuration Precautions
(1) Do the ground configuration after flight configuration procedure (Ref. AMM TASK 32-00-00-860-002).

Subtask 32-31-00-942-097-A

D. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the SAFETY BARRIER(S)S.
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:21:34 UTC