DOC AIRBUS | AMM A320FInstallation of the NLG Free-Fall Extension Cables
TASK 32-33-16-400-001-A
Installation of the NLG Free-Fall Extension Cables
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 32-33-16-941-052-A
Subtask 32-33-16-420-057-A
Subtask 32-33-16-869-053-A
[Rev.10 from 2021]
2026.04.01 12:31:26 UTC
Installation of the NLG Free-Fall Extension Cables
WARNING:
MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.
WARNING:
MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | SAFETY BARRIER(S) |
| No specific | 1 | WARNING NOTICE(S) |
| No specific | 2 | WEDGE - NON METALLIC |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 211FF, 211JF, 812 |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 8 | COTTER PINS | AIPC 32-33-01-05-130 |
| 21 | COTTER PIN | AIPC 32-33-15-01-030 |
| REFERENCE | DESIGNATION |
|---|---|
| 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 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 32-22-00-010-001-A | Nose Gear Doors - Ground Doors Opening |
| TASK 32-22-00-410-001-A | Nose Gear Doors - Ground Doors Closing |
| TASK 32-33-00-720-001-A | Functional Check of Free-Fall Extension |
| TASK 32-33-00-820-001-A | Adjustment of the NLG Free-Fall Extension Cable System |
| TASK 53-12-11-000-001-A | Removal of the Cockpit Floor Panels from FR1 thru FR12 |
| TASK 53-12-11-400-001-A | Installation of the Cockpit Floor Panels from FR1 thru FR12 |
| TASK 53-12-12-000-001-A | Removal of the Cabin Floor Panels from FR12 thru FR24 |
| TASK 53-12-12-400-001-A | Installation of the Cabin Floor Panels from FR12 thru FR24 |
Free-fall Extension Cables - NLGSubtask 32-33-16-941-052-A
A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.
(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:
(5) Make sure that a WEDGE - NON METALLIC is installed on each side of the GRAVITY GEAR EXTN handle to lock it in position.
Subtask 32-33-16-860-053-A (1) Make sure that the SAFETY BARRIER(S) are in position.
(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
- make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the landing gear.
(5) Make sure that a WEDGE - NON METALLIC is installed on each side of the GRAVITY GEAR EXTN handle to lock it in position.
B. Aircraft Maintenance Configuration
(1) Make sure that the NLG doors are open (Ref. AMM TASK 32-22-00-010-001).
(2) Make sure that the NLG Safety Pins are installed (Ref. AMM TASK 32-00-00-481-002).
(3) Make sure that the cockpit floor panels are removed (Ref. AMM TASK 53-12-11-000-001), (Ref. AMM TASK 53-12-12-000-001).
(4) Make sure that the avionics door is open.
(5) Make sure that the 98A27801001000 RIGGING PIN is in the Pin 1 position.
(6) Make sure that the 98A27901002000 PIN-RIGGING,RUDDER CONTROL is in the Pin 4 position.
Subtask 32-33-16-869-056-A (1) Make sure that the NLG doors are open (Ref. AMM TASK 32-22-00-010-001).
(2) Make sure that the NLG Safety Pins are installed (Ref. AMM TASK 32-00-00-481-002).
(3) Make sure that the cockpit floor panels are removed (Ref. AMM TASK 53-12-11-000-001), (Ref. AMM TASK 53-12-12-000-001).
(4) Make sure that the avionics door is open.
(5) Make sure that the 98A27801001000 RIGGING PIN is in the Pin 1 position.
(6) Make sure that the 98A27901002000 PIN-RIGGING,RUDDER CONTROL is in the Pin 4 position.
C. Flight Configuration Precautions
(1) If you did not open the LGCIU circuit breakers, make sure that the electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002).
(2) If you opened the LGCIU circuit breakers, make sure that the flight configuration precautions were obeyed (Ref. AMM TASK 32-00-00-860-001).
Subtask 32-33-16-865-051-A (1) If you did not open the LGCIU circuit breakers, make sure that the electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002).
(2) If you opened the LGCIU circuit breakers, make sure that the flight configuration precautions were obeyed (Ref. AMM TASK 32-00-00-860-001).
D. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. 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 |
Subtask 32-33-16-420-057-A
A. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
Subtask 32-33-16-420-050-A (1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
B. Installation of the NLG Free-Fall Extension Cables (12) and/or (14)
(1) If necessary, release the cable(s) (1) and/or (2) from the adjacent structure.
(2) Attach the cable(s) (12) and/or (14) to the cable quadrant (15) on the reduction gearbox.
(3) Connect the cable(s) (12) and/or (14) to the cable(s) (1) and/or (2) with the turnbuckle(s) (17).
(4) Install the cable-guard (24) with these items, the:
(6) Temporarily attach the locking clips (16).
Subtask 32-33-16-420-051-A (1) If necessary, release the cable(s) (1) and/or (2) from the adjacent structure.
(2) Attach the cable(s) (12) and/or (14) to the cable quadrant (15) on the reduction gearbox.
(3) Connect the cable(s) (12) and/or (14) to the cable(s) (1) and/or (2) with the turnbuckle(s) (17).
(4) Install the cable-guard (24) with these items, the:
- spacers (18), the bolts (13), (20) and the washer (19)
- washer (23) and the nut (22).
(6) Temporarily attach the locking clips (16).
C. Installation of the NLG Free-Fall Extension Cables (1) and/or (2)
(1) If necessary, release the cable(s) (12) and/or (14) from the adjacent structure.
(2) Attach the cable(s) (1) and/or (2) to the cable pulley (3).
(3) Connect the cable(s) (1) and/or (2) to the cable(s) (12) and/or (14) with the turnbuckle(s) (17).
(4) Install the cable-guide-fairleads (10) and the locking devices (11).
(5) Install the cable-guard (5) with these items, the:
(7) Temporarily attach the locking clips (16).
Subtask 32-33-16-820-050-A (1) If necessary, release the cable(s) (12) and/or (14) from the adjacent structure.
(2) Attach the cable(s) (1) and/or (2) to the cable pulley (3).
(3) Connect the cable(s) (1) and/or (2) to the cable(s) (12) and/or (14) with the turnbuckle(s) (17).
(4) Install the cable-guide-fairleads (10) and the locking devices (11).
(5) Install the cable-guard (5) with these items, the:
- spacers (6) and the bolts (4)
- washers (7) and the nuts (9).
(7) Temporarily attach the locking clips (16).
D. Adjust the Tension of the Cables
(1) Adjust the tension of the cable(s) (1), (2), (12) and (14) (Ref. AMM TASK 32-33-00-820-001).
Subtask 32-33-16-080-050-A (1) Adjust the tension of the cable(s) (1), (2), (12) and (14) (Ref. AMM TASK 32-33-00-820-001).
E. Remove the Rigging Pins
Subtask 32-33-16-410-050-A - the 98A27801001000 RIGGING PIN in the position Pin 1
- the 98A27901002000 PIN-RIGGING,RUDDER CONTROL in the position Pin 4.
F. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) On panel 110VU, remove the WEDGE - NON METALLIC from each side of the GRAVITY GEAR EXTN handle.
(3) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
Subtask 32-33-16-865-052-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) On panel 110VU, remove the WEDGE - NON METALLIC from each side of the GRAVITY GEAR EXTN handle.
(3) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
G. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-33-16-720-050-A | 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 |
H. Test
(1) Do a functional test of the free-fall extension system (Ref. AMM TASK 32-33-00-720-001).
5. Close-up(1) Do a functional test of the free-fall extension system (Ref. AMM TASK 32-33-00-720-001).
Subtask 32-33-16-869-053-A
A. Flight Configuration Precautions
(1) If you did not de-energize the aircraft electrical circuits, put the aircraft back to the ground configuration (Ref. AMM TASK 32-00-00-860-002).
Subtask 32-33-16-410-051-B (1) If you did not de-energize the aircraft electrical circuits, put the aircraft back to the ground configuration (Ref. AMM TASK 32-00-00-860-002).
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the cockpit floor panels 211FF 211JF (Ref. AMM TASK 53-12-11-400-001).
(3) Install the floor panel 221LF (Ref. AMM TASK 53-12-12-400-001).
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Close the lateral avionics-compartment door 812.
Subtask 32-33-16-942-053-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the cockpit floor panels 211FF 211JF (Ref. AMM TASK 53-12-11-400-001).
(3) Install the floor panel 221LF (Ref. AMM TASK 53-12-12-400-001).
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Close the lateral avionics-compartment door 812.
C. 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.
(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.