Functional Test of the Normal Extension and Retraction of the Landing Gear

TASK 32-31-00-720-002-A
Functional Test of the Normal Extension and Retraction of the Landing Gear

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
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)

B. Referenced Information

REFERENCE	DESIGNATION
TASK 07-11-00-581-001-A	Lifting for Aircraft Maintenance Operations
TASK 07-11-00-586-002-A	Lowering of the Aircraft for Maintenance Operations
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 24-41-00-862-002-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 29-10-00-863-001-A	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 31-60-00-860-001-A	EIS Start Procedure
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 32-00-00-860-001-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

3. Job Set-up
Subtask 32-31-00-941-071-A

A. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.
(2) Make sure that the ground safety locks are installed 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.

(4) On the panel 110VU, make sure that the GRAVITY GEAR EXTN handle is folded into the center console.
(5) Put the WARNING NOTICE(S) adjacent to the NLG and MLG to tell persons to keep clear.

Subtask 32-31-00-869-103-A

B. Flight Configuration Precautions
(1) Do the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).

Subtask 32-31-00-582-050-A

C. Lift the Aircraft
(1) Lift the aircraft on jacks (Ref. AMM TASK 07-11-00-581-001).

Subtask 32-31-00-865-060-A

D. Make sure that this(these) circuit breaker(s) is(are) closed:

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

Subtask 32-31-00-860-061-A

E. Aircraft Maintenance Configuration

WARNING: MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM. UNWANTED MOVEMENT OF HYDRAULICALLY OPERATED ITEMS CAN CAUSE SERIOUS INJURY AND/OR DAMAGE.

(1) Pressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-863-001).
(2) Energize the electrical circuits:

energize the electrical circuits from the external power (Ref. AMM TASK 24-41-00-861-002)
or
energize the electrical circuits from the APU (Ref. AMM TASK 24-41-00-861-002).

(3) If you use the APU to energize the aircraft electrical circuits, set the ADIRU 1 or 3 to ON. On the panel 20VU set the IR1 or IR3 selector switch to ATT.
(4) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).

Subtask 32-31-00-081-051-A

F. Removal of the Safety Devices

CAUTION: REMOVE THE SAFETY STAY BEFORE YOU DO THE LANDING GEAR EXTENSION AND RETRACTION TESTS. DAMAGE TO THE FUSELAGE CAN OCCUR IF THE AIRCRAFT MOVES DURING THE TESTS.

(1) Remove the ground safety locks from the landing gear:

for the NLG, remove the pin-ground lock
for the MLG, remove the ground lock sleeve from each MLG lockstay actuator.

(2) Remove the safety stay at FR73/74.

4. Procedure
Subtask 32-31-00-720-052-A

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR ARE CLEAR.

A. Functional Test of the Normal Extension and Retraction of the Landing Gear

NOTE: During the test procedure, monitor the retraction and extension times:

the retraction cycle (from the first door-uplock open to the last door-uplock closed) is between 10 and 15 seconds
the extension cycle (from the first door-uplock open to the last door-uplock closed) is between 15 and 21 seconds
the minimum flow capacity necessary from the ground hydraulic cart is 140 l.min (36.9838 USgal.mn).

(1) Do this test:

ACTION	RESULT
1.On the panel 402VU, make sure that the LDG GEAR down and locked lights are on (green).
2.On the ECAM CP: push (in) the WHEELS pushbutton switch (P/BSW).	On the ECAM lower DU: the door symbols show the closed and locked position (green) the landing gear systems 1 and 2 symbols show the down and locked position (green).
3.On the panel 400VU: move the landing-gear control-lever 6GA to the UP position.	On the panel 402VU: the LDG GEAR UNLK lights come on (red).
	On the ECAM lower DU: the door symbols show the closed and locked position (green) the L/G CTL caption comes into view (amber).
	On the aircraft: the doors start to open.
	On the ECAM lower DU: the door symbols move to the open position (amber).
	On the aircraft: the doors are fully open the L/G starts to retract.
	On the panel 402VU: the LDG GEAR down and locked lights go off.
	On the ECAM lower DU: the landing gear systems 1 and 2 symbols change color (red).
	On the aircraft: the L/G is retracted and locked up.
	On the panel 402VU: the LDG GEAR down and locked lights go off the LDG GEAR UNLK lights go off.
	On the ECAM lower DU: the L/G CTL caption goes out of view the landing gear systems 1 and 2 symbols go out of view.
	On the aircraft: the doors start to close.
	On the ECAM lower DU: the door symbols move to the closed position (amber).
	On the aircraft: the doors are closed and locked up.
	On the ECAM lower DU: the door symbols show the closed and locked position (green).
4.On the panel 400VU: move the landing-gear control-lever 6GA to the DOWN position.	On the panel 402VU: the LDG GEAR UNLK lights come on (red).
	On the ECAM lower DU: the L/G CTL caption comes into view (amber).
	On the aircraft: the doors start to open.
	On the ECAM lower DU: the door symbols move to the open position (amber).
	On the aircraft: the doors are fully open the L/G starts to extend.
	On the ECAM lower DU: the door symbols show the open position (amber) the landing gear systems 1 and 2 symbols come into view (red).
	On the aircraft: the L/G gear is down and locked.
	On the panel 402VU: the LDG GEAR UNLK lights go off (red) the LDG GEAR down and locked lights come on (green).
	On the ECAM lower DU: the L/G CTL caption goes out of view the landing gear systems 1 and 2 symbols change color (green).
	On the aircraft: the doors start to close.
	On the ECAM lower DU: the door symbols move to the closed position (amber).
	On the aircraft: the doors are closed and locked up.
	On the ECAM lower DU: the door symbols show the closed and locked position (green) the landing gear systems 1 and 2 symbols show the down and locked position (green).
5.Do the test procedure again. This is to make sure that the two LGCIUs operate correctly.

5. Close-up
Subtask 32-31-00-860-063-A

A. Aircraft Maintenance Configuration
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) Depressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-864-001).
(3) De-energize the electrical circuits:

de-energize the electrical circuits from the external power (Ref. AMM TASK 24-41-00-862-002)
or
de-energize the electrical circuits from the APU (Ref. AMM TASK 24-41-00-862-002).

(4) If the aircraft electrical circuits were supplied from the APU, set the ADIRU 1 or 3 to OFF. On the panel 20VU set the IR1 or IR3 selector switch to OFF.

Subtask 32-31-00-481-051-A

B. Install the Ground Safety Locks
(1) Install the ground safety locks on the landing gear (Ref. AMM TASK 32-00-00-481-001):

for the NLG, the pin-ground lock
for the MLG, the ground lock sleeve.

Subtask 32-31-00-586-050-A

C. Ground Configuration
(1) Lower the aircraft off the jacks (Ref. AMM TASK 07-11-00-586-002).

Subtask 32-31-00-869-104-A

D. Flight Configuration Precautions
(1) Put the aircraft back to the ground configuration (Ref. AMM TASK 32-00-00-860-002).

Subtask 32-31-00-942-056-A

E. 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).
(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] 2026.04.01 00:43:59 UTC