Functional Check of Free-Fall Extension

TASK 32-33-00-720-001-A
Functional Check of Free-Fall Extension

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.

CAUTION: MAKE SURE THAT THE RIGGING PINS ARE REMOVED BEFORE OPERATION OF THE FREE FALL SYSTEM. DAMAGE WILL OCCUR IF THE RIGGING PINS ARE INSTALLED DURING SYSTEM OPERATION.

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	SPRING BALANCE 5 DAN (12 LBF)
No specific	AR	WARNING NOTICE(S)
460005835	1	SLEEVE - GROUND LOCK
D23080000	1	PIN-GROUND LOCK,NLG

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 24-41-00-862-002-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 29-10-00-863-001-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 32-00-00-481-002-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 34-10-00-860-002-A	ADIRS Start Procedure
TASK 34-10-00-860-005-A	ADIRS Stop Procedure
Free-Fall Extension - Controls and Indications

3. Job Set-up
Subtask 32-33-00-941-050-A

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

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

(4) On panel 110VU, make sure that the GRAVITY GEAR EXTN handle is folded into the center console.
(5) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic systems.

Subtask 32-33-00-869-079-A

B. Flight Configuration Precautions
(1) If the electrical power is necessary, do the precautions for flight configuration (Ref. AMM TASK 32-00-00-860-001) before you open the LGCIU circuit breakers.

Subtask 32-33-00-582-050-A

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

Subtask 32-33-00-865-073-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	FWS/FWC1/SPLY	3WW	F01
121VU	EIS/FWC2/SPLY	2WW	Q07

Subtask 32-33-00-080-052-A

E. Removal of Safety Equipment
(1) Remove the D23080000 PIN-GROUND LOCK,NLG from the NLG.
(2) Remove the ground lock sleeve from each MLG lockstay actuator.

Subtask 32-33-00-865-050-A

F. 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 32-33-00-863-050-A

G. Pressurize the Hydraulic System

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Pressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-863-001).

Subtask 32-33-00-860-066-A

H. Aircraft Maintenance Configuration
(1) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(2) On the ECAM CP, push (in) the WHEEL pushbutton switch (PBS/W) and make sure that the WHEEL page shows on the ECAM lower DU.
(3) Make sure that the ECAM lower DU shows:

The L/G extended and locked
The L/G doors closed and locked.

(4) Make sure that the three green triangles on the L/G annunciator panel 402VU are on.
(5) Remove the safety equipment:

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.

(a) Remove the safety stay at FR73/74.
(6) Retract the landing gear:

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

(a) On the panel 400VU, move the landing-gear control-lever 6GA to the UP position.

Subtask 32-33-00-210-052-A

I. Visually Inspect the L/G During the Extension and Retraction
(1) Make sure that:

The L/G doors open
The L/G retracts
The L/G doors close and lock
The ECAM lower DU shows the L/G is up and locked and the L/G doors are closed and locked
The three green triangles on the L/G annunciator panel 402VU go off.

NOTE: During the extension and the retraction of the L/G:

The red UNLK legend comes on when the L/G is not in the same position as the selector lever
The ECAM lower DU shows the change in the L/G position and the amber L/G CTL indication.

4. Procedure
Subtask 32-33-00-720-050-A

A. Functional Check of the Free-Fall Extension

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

CAUTION: DO NOT TURN THE GRAVITY GEAR EXTENSION HANDLE MORE THAN 3 FULL TURNS. THIS CAN CAUSE DAMAGE TO THE FREE FALL EXTENSION SYSTEM.

(1) L/G Free-Fall Extension Check:
(a) Set the ADIRU 1 or 3 to ON.
(b) On panel 20VU, set the applicable IR1 and IR3 selector switch to the ATT position.
(c) On the panel 110VU, move the GRAVITY GEAR EXTN handle from the folded position.
(d) Connect a SPRING BALANCE 5 DAN (12 LBF) to the end of the GRAVITY GEAR EXTN handle.

NOTE: When you use the spring balance, it must:

Be pulled at 90 DEG to the radius of the GRAVITY GEAR EXTN handle at a rate of one full turn each 5 seconds
Show a force of between 0.5 daN (1.12 lbf) and 2 daN (4.5 lbf).

NOTE: During the procedure, record the time taken for each L/G to extend and downlock. This is the time taken between release from the uplock to when the lockstay goes fully over-center. All three L/G's operate at the same time.

CAUTION: DO NOT TURN THE GRAVITY GEAR EXTENSION HANDLE FOR A THIRD TIME UNTIL ALL THE LANDING GEAR DOORS ARE FULLY OPEN.

(2) Do this check:

ACTION	RESULT
1.On panel 110VU:	On the aircraft:
turn the GRAVITY GEAR EXTN handle clockwise two full turns if the L/G doors do not fully open, help them to fully open with your hand. NOTE: There are no aerodynamic effects on the doors during this test. This is why the doors do not always fully open.	at the end of the second turn the L/G doors have released and started to open.
make sure that all the L/G doors are fully open
wait for 30 seconds
	On the ECAM upper DU, after 30 seconds these messages will come into view: L/G DOOR NOT CLOSED MAX SPEED 250/.60.
turn the GRAVITY GEAR EXTN handle clockwise one full turn (to release each leg from its uplock) NOTE: Before you turn the GRAVITY GEAR EXT handle a third time: make sure that the travel range of the landing gear is clear.	at the end of the third turn the L/G has unlocked and started to extend.
make sure that the GRAVITY GEAR EXTN handle will not turn more than 3 turns. Do not use a force of more than 2 daN (4.5 lbf) when you turn the GRAVITY GEAR EXTN handle.
On the aircraft: record the time taken for each of the L/G to extend. NOTE: You must be on the ground when you monitor these times. These times are measured from when the L/G legs start to move, to the end of the downlock link movement.	On the aircraft: the time taken must be 11.5 +/- 5 seconds for the NLG and 23 +/- 7 seconds for the MLG.
	On panel 402VU: the three green triangles on the L/G annunciator panel come into view.
	On the ECAM lower DU, after 30 seconds: six green triangles come into view the three door symbols will show doors open (white) or doors in transit (amber).

Subtask 32-33-00-860-064-A

B. Aircraft Maintenance Configuration

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

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

(1) Install the D23080000 PIN-GROUND LOCK,NLG on the NLG and a ground lock sleeve on each MLG lockstay actuator (Ref. AMM TASK 32-00-00-481-001).
(2) Visually examine the L/G to make sure that it is down and locked.

NOTE: The L/G doors do not close after free-fall operation.

(3) Remove the D23080000 PIN-GROUND LOCK,NLG from the NLG and the ground lock sleeve from each MLG.

WARNING: WHEN THE GRAVITY GEAR HANDLE IS OPERATED THE L/G DOORS WILL CLOSE.

(4) On panel 400VU, move the landing-gear control-lever to the DOWN position (to reset the hydraulic system).
(5) On panel 110VU, turn the GRAVITY GEAR EXTN handle counterclockwise three full turns at a rate of one full turn each 5 seconds (L/G doors close). Fold the GRAVITY GEAR EXTN handle into the center console.
(6) Visually examine the L/G doors to make sure that they are closed and locked.
(7) On the panel 400VU, move the landing-gear control-lever 6GA to the UP position (doors open, L/G retracts and doors close).
(8) Visually examine the L/G and the L/G doors to make sure that they are fully retracted and locked.
(9) Make sure that the ECAM lower DU shows that:

The L/G is retracted and locked
The L/G doors are closed and locked.
Make sure that the three green triangles on the L/G annunciator panel 402VU are off.

Subtask 32-33-00-720-060-B

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

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

C. Functional Check of the L/G Safety Valve Power Interrupt Circuit

NOTE: If you did the Free-Fall Extension Check as the MPD task do this test.

(1) Make sure that ADIRS 1 or 3 are powered (Ref. AMM TASK 34-10-00-860-002), (Ref. AMM TASK 34-10-00-860-005).
(2) On panel 400VU, move the landing-gear control-lever to the DOWN position.
(3) Install a ground lock sleeve on each MLG lockstay actuator and the D23080000 PIN-GROUND LOCK,NLG on the NLG (Ref. AMM TASK 32-00-00-481-001).
(4) Visually examine the L/G to make sure that it is down and locked.
(5) Remove the ground lock sleeve from each MLG and the D23080000 PIN-GROUND LOCK,NLG from the NLG.
(6) On panel 400VU, move the landing-gear control-lever to the UP position. While the L/G retracts open the circuit breakers 1GA and 58GA and make sure that the L/G continues to retract. Close the circuit breakers 1GA and 58GA.
(7) Visually examine the L/G and the L/G doors to make sure that they are retracted and locked.

5. Close-up
Subtask 32-33-00-864-050-A

A. Depressurize the Hydraulic Systems

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

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

(1) On panel 400VU, move the landing-gear control-lever to the DOWN position.
(2) Depressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-864-001).

Subtask 32-33-00-010-060-A

B. Get Access
(1) Install a ground lock sleeve on each MLG and the D23080000 PIN-GROUND LOCK,NLG on the NLG (Ref. AMM TASK 32-00-00-481-001).
(2) Open the NLG doors (Ref. AMM TASK 32-22-00-010-001).
(3) Install the 98D32203502000 SAFETY PIN - NLG DOOR in each NLG door (Ref. AMM TASK 32-00-00-481-002).
(4) Open the MLG doors (Ref. AMM TASK 32-12-00-010-001).
(5) Install a 460005835 SLEEVE - GROUND LOCK on each MLG door actuator (Ref. AMM TASK 32-00-00-481-002).
(6) Make sure that the free-fall mechanism on the NLG and MLG door and gear uplocks has gone back to the normal position (system reset).
(7) Make sure the input levers of the cutout valve (2515GM) and the vent valves (2516GM, 2532GM) have gone back to the normal position.

Subtask 32-33-00-410-067-A

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
(3) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).

Subtask 32-33-00-860-065-A

D. Aircraft Maintenance Configuration
(1) Set the ADIRU 1 or 3 to OFF.
(2) On panel 20VU, set the IR OFF/NAV/ATT switches to OFF, as applicable.
(3) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).

Subtask 32-33-00-862-050-A

E. De-energize the Electrical Circuits
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 32-33-00-582-051-A

F. Lower the Aircraft
(1) Lower the aircraft off jacks (Ref. AMM TASK 07-11-00-586-002).

Subtask 32-33-00-869-080-A

G. Ground Configuration
(1) If you did the flight configuration precautions, put the aircraft back to the ground configuration (Ref. AMM TASK 32-00-00-860-002).

Subtask 32-33-00-942-050-A

H. Removal of Equipment
(1) Remove the SAFETY BARRIER(S).
(2) Remove the WARNING NOTICE(S).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:46:11 UTC