Functional Check of Free-Fall System

TASK 32-33-00-720-003-A
Functional Check of Free-Fall System

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.

NOTE: Before you do this task, do a Functional Check of the Free-Fall Extension, (Ref. TASK 32-33-00-720-001-A). This is to make sure that all of the conditions necessary for a landing gear extension are correct.

NOTE: The check that follows is to check for stiffness in the mechanism of each landing gear. The condition of the landing gear is satisfactory when the landing gears can be locked down by one of their two locksprings.

ZONE: 700

1. Reason for the Job
Refer to the MPD TASK: 323300-03
FUNCTIONAL CHECK OF FREE-FALL SYSTEM
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	GROUND POWER CART-HYDRAULIC
No specific	1	WARNING NOTICE(S)
460005832	1	SPRING EXPANDER-MLG SIDE STAY
460005835	2	SLEEVE - GROUND LOCK
98D32104019000	2	SPACER,SPRING ASSY
98D32203502000	2	SAFETY PIN - NLG DOOR
D23080000	1	PIN-GROUND LOCK,NLG

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
700	LANDING GEAR AND LANDING GEAR DOORS

C. 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 24-41-00-861-002-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 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 29-23-00-860-002-A	Connection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 31-60-00-860-001-A	EIS Start 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 32-11-19-000-001-A	Removal of the MLG Lock Springs
TASK 32-11-19-081-001-A	Removal of the MLG Spring-Expander Tool
TASK 32-11-19-400-001-A	Installation of the MLG Lock Springs
TASK 32-11-19-481-001-A	Installation of the MLG Spring-Expander Tool
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 32-21-18-000-002-A	Removal of one NLG Lock Spring
TASK 32-21-18-400-002-A	Installation of one NLG Lock Spring
TASK 32-22-00-410-001-A	Nose Gear Doors - Ground Doors Closing
TASK 32-31-00-720-002-A	Functional Test of the Normal Extension and Retraction of the Landing Gear
MLG Lockspring Attachment-Details
Free Fall Extension With One Lockspring Removed

3. Job Set-up
Subtask 32-33-00-850-051-A ** ON A/C NOT FOR ALL

CAUTION: THIS AMM TASK MUST BE REITERATED BY AN INSPECTOR.

A. AFR required CAUTION.

Subtask 32-33-00-941-062-A

B. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.
(2) 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.

Subtask 32-33-00-860-052-A

C. Aircraft Maintenance Configuration
(1) Disconnect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-001).
(2) Make sure that:

The GROUND LOCK PIN is installed on the NLG
The GROUND LOCK SLEEVE is installed on each MLG lockstay actuator (Ref. AMM TASK 32-00-00-481-001).

(3) Remove one NLG lockspring (Ref. AMM TASK 32-21-18-000-002).
(4) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).

Subtask 32-33-00-010-061-A

D. Get Access
(1) Open the MLG doors (Ref. AMM TASK 32-12-00-010-001).
(2) 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 32-33-00-860-053-A

E. Aircraft Maintenance Configuration
(1) Remove the MLG locksprings (Ref. AMM TASK 32-11-19-000-001).

NOTE: To remove one lockspring it is necessary to remove the two locksprings and then install one of them.

(2) Install one MLG lockspring on each of the two MLG as follows:

NOTE: The procedure that follows is to install the forward lockspring (6). The procedure to install the aft lockspring is almost the same.

(a) Install the lockspring (6) through the lockspring guide block, with the eye-end of the lockspring (6) to the side-stay attachment lugs.
(b) Install these items together:

The pin (8)
The washers (10), (7) and (11)
The lockspring (6)
The washer (13) and the nut (14).

(3) Install the 460005832 SPRING EXPANDER-MLG SIDE STAY on the lockspring (6) (Ref. AMM TASK 32-11-19-481-001).
(4) Install the 98D32104019000 SPACER,SPRING ASSY in the 460005832 SPRING EXPANDER-MLG SIDE STAY.
(5) Use the driving nuts (12) and (21) to align the eye-end of the lockspring (6) with the side-stay attachment lugs.
(6) Install these items together:

The pin (16)
The washer (17)
The lockspring (6)
The spacer (3)
The washer (5).

(7) Attach the bullet (1) to the pin (2) and install the pin (2).

NOTE: The pin (2) will push out the pin (16).

(8) Remove the bullet (1) from the pin (2).
(9) Install the washer (18) and the nut (19).

NOTE: To do the functional test with one lockspring removed it is not necessary to:

Torque the nuts (14) and (19)
Install the cotter pins (15) and (20).

(10) Remove the 98D32104019000 SPACER,SPRING ASSY from the 460005832 SPRING EXPANDER-MLG SIDE STAY.
(11) Remove the 460005832 SPRING EXPANDER-MLG SIDE STAY from the lockspring (6) (Ref. AMM TASK 32-11-19-081-001).
(12) Make sure that the pin (8) is in the center position when the 460005832 SPRING EXPANDER-MLG SIDE STAY is removed.

NOTE: The pin (8) is in the center position when the head of the pin is flush with the lug of the lockspring (6).

(13) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
(14) Remove the D23080000 PIN-GROUND LOCK,NLG from the NLG.
(15) Remove the GROUND LOCK SLEEVE from each MLG lockstay actuator.
(16) On panel 197CB, connect the GROUND POWER CART-HYDRAULIC to the aircraft ground connectors 1006GM suction and 1008GM delivery.

Subtask 32-33-00-869-083-A

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

Subtask 32-33-00-582-056-A

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

Subtask 32-33-00-865-076-A

H. 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
49VU	FWS/FWC1/SPLY	3WW	F01
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
121VU	EIS/FWC2/SPLY	2WW	Q07
121VU	LGCIU/BAT SPLY/SYS2	59GA	R33
121VU	LGCIU/BAT SPLY/SYS1	58GA	R32

Subtask 32-33-00-860-054-A

I. Aircraft Maintenance Configuration
(1) 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 FR 73/74.
(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) 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.

(5) Make sure that the ECAM lower DU shows:

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

(6) Make sure that on panel 402VU:

The three green position-indicator-lights are on.

4. Procedure
Subtask 32-33-00-720-061-A

A. Functional Check of Free-fall 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.

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.

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) Set the ADIRU 1 or 3 to ON.
(2) On panel 20VU, set the applicable IR1 or IR3 selector switch to the ATT position.
(3) On panel 400VU:

Move the landing-gear control-lever to the UP position.

(4) Make sure that the L/G extends and locks smoothly during free fall extension.

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

(5) Do this check:

ACTION	RESULT
1.On the hydraulic test rig: Slowly increase the pressure to the GREEN hydraulic system from the hydraulic test rig to 3000 psi (207 bar)	On the aircraft: The landing gear doors open, the landing gear retracts, the landing gear doors close and lock.
Fully decrease the pressure in the hydraulic test rig. On the panel 400VU, move the landing gear control-lever 6GA to the DOWN position.	On the aircraft: The landing gear stays retracted, the landing gear doors stay closed and locked On panel 402VU: The three red UNLK lights come on The ECAM lower DU shows: The landing gear doors are closed The L/G CTL legend.
2.On panel 110VU: Release the GRAVITY GEAR EXTN handle from the center console. Turn the GRAVITY GEAR EXTN handle two full turns clockwise at a rate of one turn every five seconds 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.	On the aircraft: The uplocks of the landing gear doors unlock and the landing gear doors open On panel 402VU: The three red UNLK lights stay on The ECAM lower DU shows: The landing gear doors are in transit The L/G CTL legend.
3.Make sure that all the landing gear doors are fully open.
4.On panel 110VU, turn the GRAVITY GEAR EXTN handle one full turn clockwise in five seconds. NOTE: Before you turn the GRAVITY GEAR EXT handle a third time: Make sure that the travel range of the landing gear is clear.	On the aircraft: The landing gear uplocks open The landing gear is down and locked On panel 402VU: The three red UNLK lights go off and the three green lights come on The ECAM lower DU shows: The landing gear doors open or are in transit The L/G CTL legend goes off The six L/G indicators come on. On the ECAM upper DU, after thirty seconds, these messages will show: L/G DOOR NOT CLOSED MAX SPEED 250.

5. Close-up
Subtask 32-33-00-941-063-A

A. Safety Precautions
(1) Install the D23080000 PIN-GROUND LOCK,NLG on the NLG.
(2) Install the 98D32203502000 SAFETY PIN - NLG DOOR on the NLG doors.
(3) Install a GROUND LOCK SLEEVE on each of the MLG lockstay actuators.
(4) Install the 460005835 SLEEVE - GROUND LOCK on each of the MLG doors.

Subtask 32-33-00-860-056-A

B. Aircraft Maintenance Configuration
(1) Install the removed NLG lockspring (Ref. AMM TASK 32-21-18-400-002).

NOTE: You cannot close the NLG doors because the GRAVITY GEAR EXTN handle is unfolded.

(2) Install the 460005832 SPRING EXPANDER-MLG SIDE STAY (Ref. AMM TASK 32-11-19-481-001).
(3) Install the 98D32104019000 SPACER,SPRING ASSY in the 460005832 SPRING EXPANDER-MLG SIDE STAY.
(4) Remove the lockspring (6):
(a) Remove the nut (19) and the washer (18).
(b) Use the driving nut (21) to adjust the 460005832 SPRING EXPANDER-MLG SIDE STAY until the pin (2) is loose.
(c) Remove these items together:

The pin (2)
The washer (17)
The spacer (3)
The washer (5).

(5) Use the driving nut (21) to release the tension of the lockspring (6).
(6) Remove the 98D32104019000 SPACER,SPRING ASSY from the 460005832 SPRING EXPANDER-MLG SIDE STAY.
(7) Remove the 460005832 SPRING EXPANDER-MLG SIDE STAY (Ref. AMM TASK 32-11-19-081-001).
(8) Remove the nut (14) and the washer (13).
(9) Remove these items together:

The pin (8)
The lockspring (6)
The washers (11), (7) and (10).

(10) Install the MLG locksprings (Ref. AMM TASK 32-11-19-400-001).
(11) On the panel 110VU:

Turn the GRAVITY GEAR EXTN handle three full turns counterclockwise, then fold it into the center console.

(12) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
(13) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
(14) Make sure that the work area is clean and clear of tools and other items.
(15) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
(16) Make sure that the lower ECAM DU shows:

The landing gear is down and locked
The landing gear doors are closed and locked.

(17) Make sure that on panel 402VU, the three green position-indicator-lights are on.

Subtask 32-33-00-720-062-A

C. Test
(1) Do a functional test of the L/G Normal Extension and Retraction system (Ref. AMM TASK 32-31-00-720-002).

Subtask 32-33-00-860-057-A

D. Aircraft Maintenance Configuration
(1) Make sure that the D23080000 PIN-GROUND LOCK,NLG is installed on the NLG (Ref. AMM TASK 32-00-00-481-001).
(2) Make sure that a GROUND LOCK SLEEVE is installed on each MLG lockstay actuator.
(3) Disconnect the GROUND POWER CART-HYDRAULIC from the GREEN ground-service panel on panel 197CB.
(4) Set the ADIRU 1 or 3 to OFF.
(5) On panel 20VU, set the applicable IR1 or IR3 selector switch to OFF.
(6) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 32-33-00-586-052-A

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

Subtask 32-33-00-869-084-A

F. Aircraft Maintenance Configuration
(1) Put the aircraft back to the ground configuration (Ref. AMM TASK 32-00-00-860-002).

Subtask 32-33-00-942-065-A

G. 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.9 from 2019] 2026.04.02 06:21:51 UTC