DOC AIRBUS | AMM A320FInstallation of the Nose-Wheel Steering Feedback Sensor-Box P/N E21336000 (Adjustment with CFDS)
TASK 32-51-19-400-002-A
Installation of the Nose-Wheel Steering Feedback Sensor-Box P/N E21336000 (Adjustment with CFDS)
Do this procedure only when it is necessary to replace one of the two nose wheel steering feedback sensor-boxes:
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 32-51-19-860-058-B ** ON A/C NOT FOR ALL
Subtask 32-51-19-560-052-A
Subtask 32-51-19-862-052-A Subtask 32-51-19-860-059-A
[Rev.10 from 2021]
2026.04.01 00:51:23 UTC
Installation of the Nose-Wheel Steering Feedback Sensor-Box P/N E21336000 (Adjustment with CFDS)
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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:
MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
CAUTION:
IF THE SENSOR BOX HAS P/N E21336000, NEVER REMOVE THE SENSOR FROM THE GEARBOX. THE SENSOR AND THE GEARBOX ARE AN ASSEMBLY THAT YOU MUST NOT DISASSEMBLE ON THE AIRCRAFT.
IF YOU REMOVE THE SENSOR FROM THE GEARBOX:
1. Reason for the Job- YOU WILL CAUSE DAMAGE TO THE SENSOR BOX
- THE ADJUSTMENT OF THE SENSOR BOX WILL NO LONGER BE CORRECT.
Do this procedure only when it is necessary to replace one of the two nose wheel steering feedback sensor-boxes:
- when you are away from your main base and
- when no jacking equipment is available.
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | Torque wrench: range to between 0.4 and 0.35 m.daN (35.40 and 30.97 lbf.in )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.03GBB1) | Synthetic Oil base Grease-General Purpose Clay Thickened - |
| (Material No.03GBC1) | Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. - |
| (Material No.06ABF1) | Polysulfide Sealant-Fuel Tank Quick Curing - |
| (Material No.08BBB1) | Non Aqueous Cleaner-- Petroleum Based - |
| (Material No.14QFB1) | Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 711 | NOSE GEAR |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 09-20-00-585-001-A | Taxiing |
| 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 31-32-00-860-009-A | Procedure to Get Access to the SYSTEM REPORT/TEST/L/G Page |
| TASK 32-51-00-820-003-A | Adjustment of the N/WS Zero Position with Adjusting Tool F26630200 for A/C with N/WS Feedback Sensor-Box P/N C24763000 with the Nose-Wheel Alignment Tool |
| TASK 32-51-00-820-003-A-01 | Adjustment of the N/WS Zero Position with Adjusting Tool M46196-100 for A/C with N/WS Feedback Sensor-Box P/N C24763000 with the Nose-Wheel Alignment Tool |
| TASK 32-51-00-820-003-A-02 | Adjustment of the N/WS Zero Position for A/C with N/WS Feedback Sensor-Box P/N E21336000 with the Nose-Wheel Alignment Tool |
Sensor Box P/N E21336000Subtask 32-51-19-860-058-B ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) In the cockpit, on the panel 400VU, make sure that the warning notice is in position to tell persons not to operate the landing-gear control lever.
(2) On the CAPT and F/O NWS handwheels and on the brake pedals, make sure that the warning notices are in position to tell persons not to operate them.
(3) Make sure that the warning notices are in position to tell persons not to pressurize the Green hydraulic system:
(5) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(6) On the panel 402VU, set the A/SKID & N/W STRG switch to OFF.
(7) On the MCDU, get the SYSTEM REPORT/TEST L/G page (Ref. AMM TASK 31-32-00-860-009).
Subtask 32-51-19-860-058-C ** ON A/C NOT FOR ALL (1) In the cockpit, on the panel 400VU, make sure that the warning notice is in position to tell persons not to operate the landing-gear control lever.
(2) On the CAPT and F/O NWS handwheels and on the brake pedals, make sure that the warning notices are in position to tell persons not to operate them.
(3) Make sure that the warning notices are in position to tell persons not to pressurize the Green hydraulic system:
- in the cockpit
- on the HYD section of the panel 40VU.
(5) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(6) On the panel 402VU, set the A/SKID & N/W STRG switch to OFF.
(7) On the MCDU, get the SYSTEM REPORT/TEST L/G page (Ref. AMM TASK 31-32-00-860-009).
A. Aircraft Maintenance Configuration
(1) In the cockpit, on the panel 400VU, make sure that the warning notice is in position to tell persons not to operate the landing-gear control lever.
(2) On the CAPT and F/O NWS handwheels and on the brake pedals, make sure that the warning notices are in position to tell persons not to operate them.
(3) Make sure that the warning notices are in position to tell persons not to pressurize the Yellow hydraulic system:
(5) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(6) On the panel 402VU, set the A/SKID & N/W STRG switch to OFF.
(7) On the MCDU, get the SYSTEM REPORT/TEST L/G page (Ref. AMM TASK 31-32-00-860-009).
Subtask 32-51-19-865-064-A (1) In the cockpit, on the panel 400VU, make sure that the warning notice is in position to tell persons not to operate the landing-gear control lever.
(2) On the CAPT and F/O NWS handwheels and on the brake pedals, make sure that the warning notices are in position to tell persons not to operate them.
(3) Make sure that the warning notices are in position to tell persons not to pressurize the Yellow hydraulic system:
- in the cockpit
- on the HYD section of the panel 40VU.
(5) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(6) On the panel 402VU, set the A/SKID & N/W STRG switch to OFF.
(7) On the MCDU, get the SYSTEM REPORT/TEST L/G page (Ref. AMM TASK 31-32-00-860-009).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 32-51-19-865-065-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/CTL | 1GG | M34 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS1/IND AND/SPLY | 2GG | M33 |
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/SPLY | 4GG | M36 |
| 121VU | HYDRAULIC/BRAKING AND STEERING/SYS2/CTL | 3GG | M35 |
Subtask 32-51-19-560-052-A
A. Preparation of the Replacement Component
(1) Clean the component interfaces and the adjacent area.
(2) Clean the attachment hardware with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and dry with filtered compressed air.
(3) Manually turn the pinion (6). Make sure that it turns without friction point.
(4) Apply Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) or Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. - (Material No.03GBC1) to the pinion (6).
(5) On the panel 402VU, set the A/SKID & N/W STRG switch to ON.
Subtask 32-51-19-820-052-A (1) Clean the component interfaces and the adjacent area.
(2) Clean the attachment hardware with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and dry with filtered compressed air.
(3) Manually turn the pinion (6). Make sure that it turns without friction point.
(4) Apply Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) or Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. - (Material No.03GBC1) to the pinion (6).
(5) On the panel 402VU, set the A/SKID & N/W STRG switch to ON.
B. Adjustment of the Sensor Box 3GC with the Value of Sensor Box 4GC used as a Reference
(2) Connect the electrical connector (8) to the sensor box (7).
(3) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
3GG, 4GG.
(4) Turn the pinion (6) to get the same value as the value given by the sensor box 4GC (RVDTMON) plus or minus 3 degrees.
(5) Loosen the knob (11) to release the pushrod (10).
(6) On the MCDU, push the line key adjacent to the REFRESH indication and make sure that the RVDTCOM value is the same as RVDTMON plus or minus 3 degrees.
Subtask 32-51-19-820-053-A NOTE: If the adjustment of the sensor box 4GC used as a reference is not correct, the adjustment of the sensor box 3GC to the same value can cause veering. This veering will occur during the first taxi. If the veering is not acceptable, do the maintenance procedure (Ref. AMM TASK 32-51-00-820-003).
(1) Call-up of the CFDS procedure | ACTION | RESULT |
|---|---|
| 1.On the MCDU, push the line key adjacent to the BSCU 1 indication. |
|
| 2.Push the line key adjacent to the SPECIFIC DATA indication. |
|
| 3.Push the line key adjacent to the STEERING DATA indication. |
|
| 4.On the MCDU, push the line key adjacent to the REFRESH indication. | |
| 5.On the MCDU, push the line key adjacent to the PRINT indication. |
|
(3) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
3GG, 4GG.
(4) Turn the pinion (6) to get the same value as the value given by the sensor box 4GC (RVDTMON) plus or minus 3 degrees.
(5) Loosen the knob (11) to release the pushrod (10).
(6) On the MCDU, push the line key adjacent to the REFRESH indication and make sure that the RVDTCOM value is the same as RVDTMON plus or minus 3 degrees.
C. Adjustment of the Sensor Box 4GC with the Value of Sensor Box 3GC used as a Reference
(1) Call-up of the CFDS procedure
(2) Connect the electrical connector (8) to the sensor box (7).
(3) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
3GG, 4GG.
(4) Turn the pinion (6) to get the same value as the value given by the sensor box 3GC (RVDTMON) plus or minus 3 degrees.
(5) Loosen the knob (11) to release the pushrod (10).
(6) On the MCDU, push the line key adjacent to the REFRESH indication and make sure that the RVDTCOM value is the same as RVDTMON plus or minus 3 degrees.
Subtask 32-51-19-420-053-A (1) Call-up of the CFDS procedure
| ACTION | RESULT |
|---|---|
| 1.On the MCDU, push the line key adjacent to the BSCU 1 indication. |
|
| 2.Push the line key adjacent to the SPECIFIC DATA indication. |
|
| 3.Push the line key adjacent to the STEERING DATA indication. |
|
| 4.On the MCDU, push the line key adjacent to the REFRESH indication. | |
| 5.On the MCDU, push the line key adjacent to the PRINT indication. |
|
(3) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
3GG, 4GG.
(4) Turn the pinion (6) to get the same value as the value given by the sensor box 3GC (RVDTMON) plus or minus 3 degrees.
(5) Loosen the knob (11) to release the pushrod (10).
(6) On the MCDU, push the line key adjacent to the REFRESH indication and make sure that the RVDTCOM value is the same as RVDTMON plus or minus 3 degrees.
D. Installation of the Sensor Box (7)
(1) Make sure that the spacers (5) are installed on the sensor box (7).
(2) Install the sensor box (7) on the nose landing gear.
(3) Install the springs (4), the bushes (3), the washers (2) and the screws (1).
(4) TORQUE the screws (1) to between 0.4 and 0.35 m.daN (35.40 and 30.97 lbf.in ).
(5) Turn the bnob (11).
(6) Safety the knob (11) with14QFB1 Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
Subtask 32-51-19-914-053-A (1) Make sure that the spacers (5) are installed on the sensor box (7).
(2) Install the sensor box (7) on the nose landing gear.
(3) Install the springs (4), the bushes (3), the washers (2) and the screws (1).
CAUTION:
DO NOT APPLY FINAL TORQUE AT THIS TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EQUIPMENT CAN OCCUR.
CAUTION:
DO NOT USE MORE THAN THE MAXIMUM GIVEN TORQUE TO INSTALL THE SENSOR BOX. THIS IS TO PREVENT EXCESSIVE FRICTION OF THE TEETH OF THE SENSOR BOX, WHICH CAN CAUSE EXCESSIVE TEETH WEAR AND POSSIBLE VEERING OF THE AIRCRAFT.
WHEN YOU TORQUE THE BOLTS, OBEY A CROSS SEQUENCE TO MAKE SURE THAT THE TIGHTENING IS SYMETRICAL.
(a) Tighten the screws (1) to compress the springs only. (4) TORQUE the screws (1) to between 0.4 and 0.35 m.daN (35.40 and 30.97 lbf.in )
. (5) Turn the bnob (11).
CAUTION:
MAKE SURE THAT YOU CORRECTLY AND FULLY TURN THE KNOB. THIS WILL PREVENT ENGAGEMENT OF THE PUSHROD WITH THE GEAR.
(a) Turn the knob (11) to lock the pushrod (10). (6) Safety the knob (11) with
E. Apply the Sealant
(1) Apply a layer of Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) on the areas identified E.
(2) Fill the housing of the worm screw (12) with Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) .
Subtask 32-51-19-942-054-A (1) Apply a layer of Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) on the areas identified E.
(2) Fill the housing of the worm screw (12) with Polysulfide Sealant-Fuel Tank Quick Curing - (Material No.06ABF1) .
F. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the warning notice(s).
(3) Make sure that the work area is clean and clear of tool(s) and other items.
Subtask 32-51-19-710-052-A (1) Remove the safety barriers.
(2) Remove the warning notice(s).
(3) Make sure that the work area is clean and clear of tool(s) and other items.
G. Test
(1) On the MCDU, on the STEERING DATA page, make sure that the difference between the values of the sensor boxes 3GC and 4GC is plus or minus 3 degrees.
(2) Taxi test
(a) Obey the taxiing procedure (Ref. AMM TASK 09-20-00-585-001).
(b) Make sure that the engines operate at the same power level during taxi.
(c) Release the parking brake.
(d) Put the aircraft on a straight length of taxiway.
(e) Steer the aircraft with the rudder pedals or the nose-wheel steering handwheels and align the aircraft with the taxiway centerline.
(f) Taxi the aircraft at a speed of between 10KT and 15KT and keep the aircraft straight with the rudder trim control only, over a distance of 100 meters or more.
(g) Record the value in degrees (positive or negative) of trim input necessary to keep the aircraft in a straight line.
(h) Put the aircraft back into service and make a record in the aircraft log book to monitor the NWS during the next taxi operation.
5. Close-up(1) On the MCDU, on the STEERING DATA page, make sure that the difference between the values of the sensor boxes 3GC and 4GC is plus or minus 3 degrees.
(2) Taxi test
(a) Obey the taxiing procedure (Ref. AMM TASK 09-20-00-585-001).
(b) Make sure that the engines operate at the same power level during taxi.
(c) Release the parking brake.
(d) Put the aircraft on a straight length of taxiway.
(e) Steer the aircraft with the rudder pedals or the nose-wheel steering handwheels and align the aircraft with the taxiway centerline.
(f) Taxi the aircraft at a speed of between 10KT and 15KT and keep the aircraft straight with the rudder trim control only, over a distance of 100 meters or more.
(g) Record the value in degrees (positive or negative) of trim input necessary to keep the aircraft in a straight line.
(h) Put the aircraft back into service and make a record in the aircraft log book to monitor the NWS during the next taxi operation.
Subtask 32-51-19-862-052-A Subtask 32-51-19-860-059-A
B. Put the aircraft back to the serviceable condition.