DOC AIRBUS | AMM A320FAdjustment of the NLG Downlock Proximity Sensors
TASK 32-31-73-820-005-A
Adjustment of the NLG Downlock Proximity Sensors
To set the clearances of the NLG downlock proximity sensors to the correct dimensions.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 32-31-73-941-062-A
Subtask 32-31-73-220-085-A
(2) If the dimension X for System 1 (18GA) is incorrect, do the steps that follow:
(a) Make sure that the target mounting bracket (12) is in the correct condition.
(b) Use a SCRAPER - NON METALLIC to remove all sealant from the screws (8) and the washers (9).
(c) Remove the lockwire from the screws (8) and discard it.
(d) Remove the screws (8), the washers (9) and the target (10).
(e) If installed, carefully remove the shim (11) with a WEDGE - NON METALLIC. Discard the shim.
(3) If the dimension Z for System 1 (18GA) is incorrect, do the steps that follow:
(a) Make sure that the sensor mounting bracket (2) is in the correct condition.
(b) Disconnect the electrical connector (1) from the proximity sensor (6).
(c) Make sure the electrical connector (1) is in the correct condition.
(d) Put a CAP - BLANKING on the applicable electrical connectors.
(e) Use a SCRAPER - NON METALLIC to remove all sealant from the nuts (3), the washers (4) and the screws (7).
(f) Remove the nuts (3), the washers (4), the screws (7) and the proximity sensor (6).
(g) If installed, carefully remove the shim (5) with a WEDGE - NON METALLIC. Discard the shim.
(4) If the dimension Z for System 2 (19GA) is incorrect, do the steps that follow:
(a) Make sure that the target mounting bracket (12) is in the correct condition.
(b) Use a SCRAPER - NON METALLIC to remove all sealant from the screws (16) and the washers (15).
(c) Remove the lockwire from the screws (16) and discard it.
(d) Remove the screws (16), the washers (15) and the target (14).
(e) If installed, carefully remove the shim (13) with a WEDGE - NON METALLIC. Discard the shim.
(5) If the dimension X for System 2 (19GA) is incorrect, do the steps that follow:
(a) Make sure that the sensor mounting bracket (21) is in the correct condition.
(b) Disconnect the electrical connector (17) from the proximity sensor (23).
(c) Make sure the electrical connector (17) is in the correct condition.
(d) Put a CAP - BLANKING on the applicable electrical connectors.
(e) Use a SCRAPER - NON METALLIC to remove all sealant from the nuts (19), the washers (20) and the screws (18).
(f) Remove the nuts (19), the washers (20), the screws (18) and the proximity sensor (23).
(g) If installed, carefully remove the shim (22) with a WEDGE - NON METALLIC. Discard the shim.
Subtask 32-31-73-820-058-A
(a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with the Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the mating faces of:
(c) Apply Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) to the two sides of the shim (11).
(d) If necessary, put the shim (11) in position on the target mounting bracket (12).
(e) Align the target (10) with the shim (11), if installed, and install the washers (9) and the screws (8).
(f) Tighten the screws (8).
(g) Safety the screws (8) with the14QDC1 Wire-Locking Dia: 0.5 mm (0.020 inch) CRES -
(h) Apply a layer of the Polysulfide Sealant-General Purpose Interfay Landing Gear (Material No.06AAC5) to the screws (8) and the washers (9).
(2) For system 1 (18GA), if you adjusted dimension Z, do the steps that follow:
(a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with the Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the mating faces of:
(c) Apply Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) to the two sides of the shim (5).
(d) If necessary, put the shim (5) in position on the sensor mounting bracket (2).
(e) Align the sensor (6) with the shim (5), if installed, and install the screws (7), the washers (4) and the nuts (3).
(f) Tighten the nuts (3).
(g) Remove the CAP - BLANKING from the applicable electrical connectors.
(h) Connect the electrical connector (1) to the proximity sensor (6).
(i) Apply a layer of the Polysulfide Sealant-General Purpose Interfay Landing Gear (Material No.06AAC5) to the screws (7), the washers (4) and the nuts (3).
(3) For system 2 (19GA), if you adjusted dimension Z, do the steps that follow:
(a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with the Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the mating faces of:
(c) Apply Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) to the two sides of the shim (22).
(d) If necessary, put the shim (22) in position on the sensor mounting bracket (21).
(e) Align the sensor (23) with the shim (22) and install the screws (18), the washers (20) and the nuts (19).
(f) Tighten the nuts (19).
(g) Remove the CAP - BLANKING from the applicable electrical connectors.
(h) Connect the electrical connector (17) to the proximity sensor (23).
(i) Apply a layer of the Polysulfide Sealant-General Purpose Interfay Landing Gear (Material No.06AAC5) to the screws (18), the washers (20) and the nuts (19).
(4) For system 2 (19GA), if you adjusted dimension X, do the steps that follow:
(a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with the Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the mating faces of:
(c) Apply Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) to the two sides of the shim (13).
(d) If necessary, put the shim (13) in position on the target mounting bracket (12).
(e) Align the target (14) with the shim (13) and install the washers (15) and the screws (16).
(f) Tighten the screws (16).
(g) Safety the screws (16) with the14QDC1 Wire-Locking Dia: 0.5 mm (0.020 inch) CRES -
(h) Apply a layer of the Polysulfide Sealant-General Purpose Interfay Landing Gear (Material No.06AAC5) to the screws (16) and the washers (15).
Subtask 32-31-73-865-078-A
Subtask 32-31-73-410-065-A
[Rev.10 from 2021]
2026.04.01 12:31:14 UTC
Adjustment of the NLG Downlock Proximity Sensors
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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobTo set the clearances of the NLG downlock proximity sensors to the correct dimensions.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 2M (6 FT) |
| No specific | AR | CAP - BLANKING |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| No specific | 1 | SCRAPER - NON METALLIC |
| No specific | AR | WARNING NOTICE(S) |
| No specific | 1 | WEDGE - NON METALLIC |
| 98D32203502000 | 2 | SAFETY PIN - NLG DOOR |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.05EML7) | Epoxy Adhesive-- - Legacy 3 |
| (Material No.06AAC5) | Polysulfide Sealant-General Purpose Interfay Landing Gear |
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.08BBB1) | Non Aqueous Cleaner-- Petroleum Based - |
| (Material No.14QDC1) | Wire-Locking Dia: 0.5 mm (0.020 inch) CRES - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 22 | SHIM | AIPC 32-21-17-03-040 |
| 5 | SHIM | AIPC 32-21-17-03-040 |
| 11 | SHIM | AIPC 32-21-17-03-110 |
| 13 | SHIM | AIPC 32-21-17-03-110 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 07-11-00-581-003-A | Lifting of the Aircraft at the Forward Jacking Point, MLG Wheels on the Ground |
| TASK 07-11-00-586-001-A | Lowering of the Aircraft at Forward Jacking Point, MLG Wheels on the Ground |
| 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 29-10-00-864-001-A | Depressurize the Green Hydraulic System |
| TASK 29-14-00-614-002-A | Pressurization of the Hydraulic Reservoirs through the Ground Connector |
| TASK 29-14-00-614-002-A-01 | Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU) |
| 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 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 32-69-00-740-001-A | BITE Check of Landing-Gear Control Interface-Unit (LGCIU) With Use of MCDU to Ensure that Continuous BITE is Operative |
NLG Downlock Proximity Sensors 18GA, 19GASubtask 32-31-73-941-062-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 installed on the landing-gear (Ref. AMM TASK 32-00-00-481-001).
(3) On panel 400VU:
Subtask 32-31-73-860-063-A (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 installed on the landing-gear (Ref. AMM TASK 32-00-00-481-001).
(3) On 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 and the NLG doors.
B. Aircraft Maintenance Configuration
(1) Make sure that the Green hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-001).
(2) Disconnect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-001).
(3) If the electrical power is not necessary for other maintenance tasks, de-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002). Then, it is not necessary to open the LGCIU circuit breakers.
(4) 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 32-31-73-865-077-A (1) Make sure that the Green hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-001).
(2) Disconnect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-001).
(3) If the electrical power is not necessary for other maintenance tasks, de-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002). Then, it is not necessary to open the LGCIU circuit breakers.
(4) 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.
C. Open, safety and tag this(these) circuit breaker(s):
Subtask 32-31-73-010-061-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 |
D. Get Access
(1) Open the NLG doors (Ref. AMM TASK 32-22-00-010-001).
(2) Install a 98D32203502000 SAFETY PIN - NLG DOOR in each NLG door (Ref. AMM TASK 32-00-00-481-002).
4. Procedure(1) Open the NLG doors (Ref. AMM TASK 32-22-00-010-001).
(2) Install a 98D32203502000 SAFETY PIN - NLG DOOR in each NLG door (Ref. AMM TASK 32-00-00-481-002).
Subtask 32-31-73-220-085-A
A. Dimensional Check
(1) Measure and record the dimensions X and Z (System 1) for the proximity sensor 18GA:
Subtask 32-31-73-865-084-A (1) Measure and record the dimensions X and Z (System 1) for the proximity sensor 18GA:
- Dimension X must be 6.5 mm (0.2559 in.) +/- 0.1 mm (0.0039 in.)
- Dimension Z must be 1.5 mm (0.0591 in.) +/- 0.1 mm (0.0039 in.).
- Dimension Z must be 1.5 mm (0.0591 in.) +/- 0.1 mm (0.0039 in.)
- Dimension X must be 6.5 mm (0.2559 in.) +/- 0.1 mm (0.0039 in.).
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 32-31-73-582-059-A Subtask 32-31-73-010-062-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| 49VU | FLIGHT CONTROLS/FCDC1/SPLY | 20CE1 | B10 |
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B08 |
| ** ON A/C ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| 49VU | NAV PROBES/ADIRU 1/AND AOA 1/26VAC | 5FP1 | F07 |
| 49VU | NAV PROBES/ADIRU1/115VAC | 4FP1 | F06 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| 49VU | FLIGHT CONTROLS/FCDC1/SPLY | 20CE1 | B05 |
| 49VU | FLIGHT CONTROLS/SEC1/NORM/SPLY | 21CE1 | B03 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG2/OIL/PRESS | 2EN2 | N42 |
| 121VU | ENGINE/ENG1/OIL/PRESS | 2EN1 | N40 |
| ** 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/BRAKING AND STEERING/SYS2/SPLY | 4GG | M36 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/CTL | 3GG | M35 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/CTL | 1GG | M34 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY | 2GG | M33 |
| 121VU | ADIRS/ADIRU/3/26VAC AND AOA | 5FP3 | N07 |
| 121VU | ADIRS/ADIRU/3/115VAC | 4FP3 | N05 |
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
| 121VU | FLIGHT CONTROLS/FCDC2/SPLY | 20CE2 | Q20 |
| 121VU | FLIGHT CONTROLS/SEC3/SPLY | 21CE3 | Q19 |
| 121VU | FLIGHT CONTROLS/ELAC2/NORM/SPLY | 15CE2 | R20 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | LGCIU/BAT SPLY/SYS2 | 59GA | R32 |
| 121VU | LGCIU/BAT SPLY/SYS1 | 58GA | R31 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG2/OIL/PRESS/AND REV SNSR/CHAN A | 2EN2 | N42 |
| 121VU | ENGINE/ENG1/OIL/PRESS/AND REV SNSR/CHAN A | 2EN1 | N40 |
D. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) in position below the applicable zone 123(124).
(2) Make sure that a 98D32203502000 SAFETY PIN - NLG DOOR is installed in each NLG door (Ref. AMM TASK 32-00-00-481-002).
Subtask 32-31-73-820-054-A (1) Put the ACCESS PLATFORM 2M (6 FT) in position below the applicable zone 123(124).
(2) Make sure that a 98D32203502000 SAFETY PIN - NLG DOOR is installed in each NLG door (Ref. AMM TASK 32-00-00-481-002).
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
E. Preparation for Adjustment of the NLG Downlock Proximity Sensors 18GA (19GA) NOTE: It is permitted to install a sensor target without a spacer/shim if the correct clearance can be set without the spacer/shim.
(1) Make sure that the lock-link is on its mechanical stop. (2) If the dimension X for System 1 (18GA) is incorrect, do the steps that follow:
(a) Make sure that the target mounting bracket (12) is in the correct condition.
(b) Use a SCRAPER - NON METALLIC to remove all sealant from the screws (8) and the washers (9).
(c) Remove the lockwire from the screws (8) and discard it.
(d) Remove the screws (8), the washers (9) and the target (10).
(e) If installed, carefully remove the shim (11) with a WEDGE - NON METALLIC. Discard the shim.
(3) If the dimension Z for System 1 (18GA) is incorrect, do the steps that follow:
(a) Make sure that the sensor mounting bracket (2) is in the correct condition.
(b) Disconnect the electrical connector (1) from the proximity sensor (6).
(c) Make sure the electrical connector (1) is in the correct condition.
(d) Put a CAP - BLANKING on the applicable electrical connectors.
(e) Use a SCRAPER - NON METALLIC to remove all sealant from the nuts (3), the washers (4) and the screws (7).
(f) Remove the nuts (3), the washers (4), the screws (7) and the proximity sensor (6).
(g) If installed, carefully remove the shim (5) with a WEDGE - NON METALLIC. Discard the shim.
(4) If the dimension Z for System 2 (19GA) is incorrect, do the steps that follow:
(a) Make sure that the target mounting bracket (12) is in the correct condition.
(b) Use a SCRAPER - NON METALLIC to remove all sealant from the screws (16) and the washers (15).
(c) Remove the lockwire from the screws (16) and discard it.
(d) Remove the screws (16), the washers (15) and the target (14).
(e) If installed, carefully remove the shim (13) with a WEDGE - NON METALLIC. Discard the shim.
(5) If the dimension X for System 2 (19GA) is incorrect, do the steps that follow:
(a) Make sure that the sensor mounting bracket (21) is in the correct condition.
(b) Disconnect the electrical connector (17) from the proximity sensor (23).
(c) Make sure the electrical connector (17) is in the correct condition.
(d) Put a CAP - BLANKING on the applicable electrical connectors.
(e) Use a SCRAPER - NON METALLIC to remove all sealant from the nuts (19), the washers (20) and the screws (18).
(f) Remove the nuts (19), the washers (20), the screws (18) and the proximity sensor (23).
(g) If installed, carefully remove the shim (22) with a WEDGE - NON METALLIC. Discard the shim.
F. Adjustment of the NLG Downlock Proximity Sensors 18GA (19GA)
(a) Temporarily install the shim (11) with the washers (9) and the screws (8).
(b) Calculate the shim thickness (Dimension J):
(d) Put a mark on the shim to show its position.
(e) Remove the screws (8), the washers (9) and the shim (11).
(f) If the shim (11) was adjusted, do the work steps in Para 4.H.
(2) To get the correct dimension Z for System 1 (18GA), adjust the new AIPC 32-21-17-03-040 SHIM (5) as follows:
(a) Temporarily install the shim (5) with the screws (7), the washers (4) and the nuts (3).
(b) Calculate the shim thickness (Dimension G):
(d) Put a mark on the shim to show its position.
(e) Remove the nuts (3), the washers (4), the screws (7) and the shim (5).
(f) If the shim (5) was adjusted, do the work steps in Para 4.H.
(3) To get the correct dimension Z for System 2 (19GA), adjust the new AIPC 32-21-17-03-040 SHIM (22) as follows:
(a) Temporarily install the shim (22) with the screws (18), the washers (20) and the nuts (19).
(b) Calculate the shim thickness (Dimension P):
(d) Put a mark on the shim to show its position.
(e) Remove the nuts (19), the washers (20), the screws (18) and the shim (22).
(f) If the shim (22) was adjusted, do the work steps in Para 4.H.
(4) To get the correct dimension X for System 2 (19GA), adjust the new AIPC 32-21-17-03-110 SHIM (13) as follows:
(a) Temporarily install the shim (13) with the washers (15) and the screws (16).
(b) Calculate the shim thickness (Dimension M):
(d) Put a mark on the shim to show its position.
(e) Remove the screws (16), the washers (15) and the shim (13).
(f) If the shim (13) was adjusted, do the work steps in Para 4.H.
Subtask 32-31-73-916-050-A NOTE: It is permitted to install a sensor target without a spacer/shim if the correct clearance can be set without the spacer/shim. If a spacer/shim is necessary to set the correct clearance, do the procedure that follows.
(1) To get the correct dimension X for System 1 (18GA), adjust the new AIPC 32-21-17-03-110 SHIM (11) as follows: (a) Temporarily install the shim (11) with the washers (9) and the screws (8).
(b) Calculate the shim thickness (Dimension J):
- Measure the dimension H
- Measure the dimension K.
| ---------------------------- |
| ! Dim K - Dim H = Dim J ! |
| ---------------------------- |
(d) Put a mark on the shim to show its position.
(e) Remove the screws (8), the washers (9) and the shim (11).
(f) If the shim (11) was adjusted, do the work steps in Para 4.H.
(2) To get the correct dimension Z for System 1 (18GA), adjust the new AIPC 32-21-17-03-040 SHIM (5) as follows:
(a) Temporarily install the shim (5) with the screws (7), the washers (4) and the nuts (3).
(b) Calculate the shim thickness (Dimension G):
- Measure the dimension E
- Measure the dimension F.
| ---------------------------- |
| ! Dim E - Dim F = Dim G ! |
| ---------------------------- |
(d) Put a mark on the shim to show its position.
(e) Remove the nuts (3), the washers (4), the screws (7) and the shim (5).
(f) If the shim (5) was adjusted, do the work steps in Para 4.H.
(3) To get the correct dimension Z for System 2 (19GA), adjust the new AIPC 32-21-17-03-040 SHIM (22) as follows:
(a) Temporarily install the shim (22) with the screws (18), the washers (20) and the nuts (19).
(b) Calculate the shim thickness (Dimension P):
- Measure the dimension Q
- Measure the dimension R.
| ---------------------------- |
| ! Dim Q - Dim R = Dim P ! |
| ---------------------------- |
(d) Put a mark on the shim to show its position.
(e) Remove the nuts (19), the washers (20), the screws (18) and the shim (22).
(f) If the shim (22) was adjusted, do the work steps in Para 4.H.
(4) To get the correct dimension X for System 2 (19GA), adjust the new AIPC 32-21-17-03-110 SHIM (13) as follows:
(a) Temporarily install the shim (13) with the washers (15) and the screws (16).
(b) Calculate the shim thickness (Dimension M):
- Measure the dimension L
- Measure the dimension N.
| ---------------------------- |
| ! Dim L - Dim N = Dim M ! |
| ---------------------------- |
(d) Put a mark on the shim to show its position.
(e) Remove the screws (16), the washers (15) and the shim (13).
(f) If the shim (13) was adjusted, do the work steps in Para 4.H.
G. Preparation of the Shims After Material Removal
(1) Before installation of the applicable shim(s), do the steps that follow:
(a) Clean the applicable shim(s) with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(b) Flush the applicable shim(s) with cold water.
Subtask 32-31-73-410-062-A (1) Before installation of the applicable shim(s), do the steps that follow:
(a) Clean the applicable shim(s) with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(b) Flush the applicable shim(s) with cold water.
WARNING:
DO NOT LET COMPRESSED GAS TOUCH YOUR SKIN. THE GAS CAN GO THROUGH THE SKIN AND MAKE BUBBLES IN THE BLOOD. THIS CONDITION CAN KILL YOU.
WARNING:
WHEN YOU USE COMPRESSED AIR:
(c) Flush the applicable shim(s) with hot water and then dry them with compressed air. - USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
- DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS.
WARNING:
USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.
H. Installation of the NLG Downlock Proximity-SensorsNOTE: It is permitted to install a sensor target without a spacer and (or) shim if you can set the correct clearance without the spacer and (or) shim.
(1) For system 1 (18GA), if you adjusted dimension X, do the steps that follow:(a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with the Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the mating faces of:
- The target (10)
- The shim (11)
- The target mounting bracket (12).
(c) Apply Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) to the two sides of the shim (11).
(d) If necessary, put the shim (11) in position on the target mounting bracket (12).
(e) Align the target (10) with the shim (11), if installed, and install the washers (9) and the screws (8).
(f) Tighten the screws (8).
(g) Safety the screws (8) with the
(h) Apply a layer of the Polysulfide Sealant-General Purpose Interfay Landing Gear (Material No.06AAC5) to the screws (8) and the washers (9).
(2) For system 1 (18GA), if you adjusted dimension Z, do the steps that follow:
(a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with the Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the mating faces of:
- The sensor (6)
- The shim (5), if installed
- The sensor mounting bracket (2).
(c) Apply Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) to the two sides of the shim (5).
(d) If necessary, put the shim (5) in position on the sensor mounting bracket (2).
(e) Align the sensor (6) with the shim (5), if installed, and install the screws (7), the washers (4) and the nuts (3).
(f) Tighten the nuts (3).
(g) Remove the CAP - BLANKING from the applicable electrical connectors.
(h) Connect the electrical connector (1) to the proximity sensor (6).
(i) Apply a layer of the Polysulfide Sealant-General Purpose Interfay Landing Gear (Material No.06AAC5) to the screws (7), the washers (4) and the nuts (3).
(3) For system 2 (19GA), if you adjusted dimension Z, do the steps that follow:
(a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with the Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the mating faces of:
- The sensor (23)
- The shim (22), if installed
- The sensor mounting bracket (21).
(c) Apply Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) to the two sides of the shim (22).
(d) If necessary, put the shim (22) in position on the sensor mounting bracket (21).
(e) Align the sensor (23) with the shim (22) and install the screws (18), the washers (20) and the nuts (19).
(f) Tighten the nuts (19).
(g) Remove the CAP - BLANKING from the applicable electrical connectors.
(h) Connect the electrical connector (17) to the proximity sensor (23).
(i) Apply a layer of the Polysulfide Sealant-General Purpose Interfay Landing Gear (Material No.06AAC5) to the screws (18), the washers (20) and the nuts (19).
(4) For system 2 (19GA), if you adjusted dimension X, do the steps that follow:
(a) Use a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with the Non Aqueous Cleaner-General - - (Material No.08BAA9) to clean the mating faces of:
- The target (14)
- The shim (13), if installed
- The target mounting bracket (12).
(c) Apply Epoxy Adhesive-- - Legacy 3 (Material No.05EML7) to the two sides of the shim (13).
(d) If necessary, put the shim (13) in position on the target mounting bracket (12).
(e) Align the target (14) with the shim (13) and install the washers (15) and the screws (16).
(f) Tighten the screws (16).
(g) Safety the screws (16) with the
(h) Apply a layer of the Polysulfide Sealant-General Purpose Interfay Landing Gear (Material No.06AAC5) to the screws (16) and the washers (15).
I. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-31-73-740-059-A Subtask 32-31-73-582-060-A Subtask 32-31-73-865-087-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 |
L. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-31-73-860-064-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B11 |
| 49VU | FLIGHT CONTROLS/FCDC1/SPLY | 20CE1 | B10 |
| ** ON A/C ALL | |||
| 49VU | L/G/LGCIU/SYS1/NORM | 1GA | C09 |
| 49VU | NAV PROBES/ADIRU 1/AND AOA 1/26VAC | 5FP1 | F07 |
| 49VU | NAV PROBES/ADIRU1/115VAC | 4FP1 | F06 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/ELAC1/NORM/SPLY | 15CE1 | B06 |
| 49VU | FLIGHT CONTROLS/FCDC1/SPLY | 20CE1 | B05 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG2/OIL/PRESS | 2EN2 | N42 |
| 121VU | ENGINE/ENG1/OIL/PRESS | 2EN1 | N40 |
| ** 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/BRAKING AND STEERING/SYS2/SPLY | 4GG | M36 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/CTL | 3GG | M35 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/CTL | 1GG | M34 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY | 2GG | M33 |
| 121VU | ADIRS/ADIRU/3/26VAC AND AOA | 5FP3 | N07 |
| 121VU | ADIRS/ADIRU/3/115VAC | 4FP3 | N05 |
| 121VU | HYDRAULIC/LGCIU/SYS2 | 2GA | Q35 |
| 121VU | HYDRAULIC/LGCIU/SYS1/GRND SPLY | 52GA | Q34 |
| 121VU | FLIGHT CONTROLS/FCDC2/SPLY | 20CE2 | Q20 |
| 121VU | FLIGHT CONTROLS/SEC3/SPLY | 21CE3 | Q19 |
| 121VU | FLIGHT CONTROLS/ELAC2/NORM/SPLY | 15CE2 | R20 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | LGCIU/BAT SPLY/SYS2 | 59GA | R32 |
| 121VU | LGCIU/BAT SPLY/SYS1 | 58GA | R31 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | ENGINE/ENG2/OIL/PRESS/AND REV SNSR/CHAN A | 2EN2 | N42 |
| 121VU | ENGINE/ENG1/OIL/PRESS/AND REV SNSR/CHAN A | 2EN1 | N40 |
M. Aircraft Maintenance 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).
(2) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
(3) Pressurize the applicable hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-002).
5. Close-up(1) If you did the flight configuration precautions, put the aircraft back to the ground configuration (Ref. AMM TASK 32-00-00-860-002).
(2) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
(3) Pressurize the applicable hydraulic reservoirs (Ref. AMM TASK 29-14-00-614-002).
Subtask 32-31-73-410-065-A
A. Close Access
(1) Remove the 98D32203502000 SAFETY PIN - NLG DOOR from each of the NLG doors.
(2) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
Subtask 32-31-73-942-061-A (1) Remove the 98D32203502000 SAFETY PIN - NLG DOOR from each of the NLG doors.
(2) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
B. Removal of Equipment
(1) Remove the SAFETY BARRIER(S).
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) 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 access platform(s).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.