W DOC AIRBUS | AMM A320F

General Visual Inspection of the Flight/Ground Sensing-Mechanism

TASK 32-21-00-210-802-A
General Visual Inspection of the Flight/Ground Sensing-Mechanism

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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.
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 THE TRAVEL RANGES OF THE LANDING GEAR ARE CLEAR.
FIN: 24GA
FIN: 25GA
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
CHOCK - WHEEL(S)
No specific
AR
SAFETY BARRIER(S)
No specific
AR
WARNING NOTICE(S)
D23080000
1
PIN-GROUND LOCK,NLG
MZ23080000
1
PIN-LOCKING
 B. Consumable Materials
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.06AAB1)
Polysulfide Sealant-General Purpose Fillet -
(Material No.12ACB1)
Corrosion Preventive Compound-Heavy Duty Hard Film -
 C. Referenced Information
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 12-12-32-610-001-A
Check NLG Shock Absorber Fluid Level and Charge Pressure ("Two-Point Check" - Aircraft on Jacks to start)
TASK 12-12-32-610-001-A-01
Check NLG Shock Absorber Fluid Level and Charge Pressure ("Two-Point Check" - Aircraft on Ground to start)
TASK 32-21-00-200-002-A
General Visual Inspection of the Nose Landing Gear
TASK 32-21-00-200-804-A
Check of Plays at Upper and Lower Torque-Link Hinges
TASK 32-21-27-000-002-A
Removal of the Torque-Link Center Hinge
TASK 32-21-27-400-002-A
Installation of the Torque-Link Center Hinge
TASK 32-21-45-000-801-A
Removal of the Flight/Ground Sensing Mechanism
TASK 32-21-45-400-801-A
Installation of the Flight/Ground Sensing Mechanism
TASK 32-31-73-000-005-A
Removal of the NLG Proximity-Sensors
TASK 32-31-73-200-002-A
Inspection of the NLG Proximity Sensor and Target Clearances
TASK 32-31-73-400-005-A
Installation of the NLG Proximity-Sensors
ESPM 205450
ASM 323103
ASM 323104
TASK 12-22-00-00
LUBRICATION - DESCRIPTION AND OPERATION
F Flight/Ground Sensing Mechanism ** ON A/C NOT FOR ALL
F Flight-Ground Sensing-Mechanism with the One Grease Nipple on the Pin ** ON A/C NOT FOR ALL
F Flight-Ground Sensing-Mechanism with the Two Grease Nipples on the Pin ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 32-21-00-941-093-A
A. Safety Precautions
   (1) Make sure that the D23080000 PIN-GROUND LOCK,NLG, or the MZ23080000 PIN-LOCKING as an alternative, is in position.
   (2) In the cockpit, on right center instrument-panel 400VU, put a WARNING NOTICE(S) in position to tell persons not to operate the landing-gear normal control-lever.
   (3) Put a WARNING NOTICE(S) in position on the steering handwheels (CAPT and F/O) and on the brake pedals to tell persons not to operate them.
   (4) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
Subtask 32-21-00-860-099-A
B. Aircraft Maintenance Configuration
   (1) On the right center instrument-panel 400VU:
  • Make sure that the landing-gear normal control-lever is in the DOWN position.
   (2) Make sure that CHOCK - WHEEL(S) are in position on the main landing gear.
4. Procedure
Subtask 32-21-00-210-074-C ** ON A/C NOT FOR ALL
A. General Visual Inspection of the NLG
   (1) Do a general visual inspection of the NLG (Ref. AMM TASK 32-21-00-200-002).
   (2) Do a visual check of the NLG proximity sensors (13) and (16) and the related flight/ground sensing mechanism as follows:
     (a) Do a check of the target lever (1) and the rod link (3) for damage (wear, cracks or corrosion).
     (b) Do a check of the rod link bearings (9) and (10) for damage (wear, cracks, distortion or corrosion).
     (c) Do a check of the cover (2) that is attached to the turning tube.
       1 Make sure that the cover bolt (4) is not loose or missing.
     (d) If you find defects in the flight/ground sensing mechanism, replace the damaged parts, as necessary (Ref. AMM TASK 32-21-45-000-801) and (Ref. AMM TASK 32-21-45-400-801).
     (e) Do a check of the NLG proximity sensors (13) and (16).
       1 Make sure that the NLG proximity sensors (13) and (16) are in the correct condition.
     (f) Do a check of the electrical connectors (17) as follows:
       1 Disconnect the electrical connectors (17) from the NLG proximity sensors (13) and (16).
       2 Do a check of the pins. If necessary, repair them ASM 323103 or ASM 323104.
         a If there is contamination, corrosion, bent or broken pins:
     (g) Connect the electrical connectors (17) to the NLG proximity sensors (13) and (16).
     (h) Apply Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) on the electrical connectors (17) ESPM 205450.
     (i) Do a check of the sealant on the bolts and the nuts of:
  • The targets (14) and (15)
  • The NLG proximity sensors (13) and (16)
  • The sensor mounting brackets (12) and (18).
       1 If the sealant is not in the correct condition:
         a Make sure that the bolts and the nuts are correctly tightened (Ref. AMM TASK 32-31-73-400-005).
         b Apply Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the bolts and the nuts (Ref. AMM TASK 32-31-73-400-005).
   (3) 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) through the grease nipple (6) to lubricate the pin (7) and the target lever (1).
NOTE: For lubricant grease specification and lubrication requirements, refer to (Ref. AMM D/O 12-22-00-00).
     (a) Make sure that the grease comes out from the two sides of the target lever (1).
       1 If the grease does not come out from the two sides of the target lever (1), do the steps that follow:
         a Remove the pin (7) (Ref. AMM TASK 32-21-45-000-801).
         b Clean the pin (7).
         c Make sure that the greasing paths are not clogged.
         d Install the pin (7) (Ref. AMM TASK 32-21-45-400-801).
   (4) Do a check of the fluid level and the charge pressure of the NLG shock absorber (Ref. AMM TASK 12-12-32-610-001).
   (5) Lift the aircraft on jacks (NLG only) (Ref. AMM TASK 07-11-00-581-003).
   (6) With the NLG shock absorber fully extended:
     (a) Do a check of dimension H:
       1 Make sure that dimension H is 449 mm (17.68 in.) +/- 2 mm (0.08 in.).
     (b) Make sure that the pointer (5) on the NLG leg is aligned with the index (20).
     (c) Do a check of the NLG torque-link assembly (Ref. AMM TASK 32-21-00-200-804).
       1 Move the elements of the flight/ground sensing mechanism smoothly.
       2 Make sure that there are no mechanical plays that can cause an incorrect position of the targets (14) and (15). Be very careful with the target lever (1) and the upper bolt (11) of the rod link (3).
       3 If you find defects and/or unwanted mechanical plays in the flight/ground sensing mechanism:
       4 Remove the torque-link center hinge (Ref. AMM TASK 32-21-27-000-002).
       5 Move the upper torque link to manually operate the flight/ground sensing mechanism.
       6 Make sure that the flight/ground sensing mechanism moves smoothly and there is no movement between:
  • The balls of the rod link bearing (9) and the bolt (8)
  • The balls of the rod link bearing (10) and the bolt (11).
         a If there is movement between the balls of the rod link bearing (9) and the bolt (8):
  • Replace the bolt (8).
         b If there is movement between the balls of the rod link bearing (10) and the bolt (11):
  • Replace the bolt (11).
         c If you find defects on the balls of the rod link bearing(s) (9) and/or (10):
         d If the rod link bearing(s) (9) and/or (10) cannot move freely:
       7 Install the torque-link center hinge (Ref. AMM TASK 32-21-27-400-002).
     (d) Do a check of the clearance between:
Subtask 32-21-00-210-074-D ** ON A/C NOT FOR ALL
A. General Visual Inspection of the NLG
NOTE: This subtask is only applicable for the NLG with the one greaser nipple on the pin (8) of the flight/ground sensing mechanism.
For the NLG with the two greaser nipples on the pin (8) of the flight/ground sensing mechanism, go to para 4.B.
   (1) Do a general visual inspection of the NLG (Ref. AMM TASK 32-21-00-200-002).
   (2) Do a visual check of the NLG proximity sensors (14) and (17) and the related flight/ground sensing mechanism as follows:
     (a) Do a check of the target lever (1) and the rod link (3) for damage (wear, cracks or corrosion).
     (b) Do a check of the rod link bearings (10) and (11) for damage (wear, cracks, distortion or corrosion).
     (c) Do a check of the cover (2) that is attached to the turning tube.
       1 Make sure that the cover bolt (4) is not loose or missing.
     (d) If you find defects in the flight/ground sensing mechanism, replace the damaged parts, as necessary (Ref. AMM TASK 32-21-45-000-801) and (Ref. AMM TASK 32-21-45-400-801).
     (e) Do a check of the NLG proximity sensors (14) and (17).
       1 Make sure that NLG proximity sensors (14) and (17) are in the correct condition.
     (f) Do a check of the electrical connectors (18) as follows:
       1 Disconnect the electrical connectors (18) from the NLG proximity sensors (14) and (17).
       2 Do a check of the pins A and B and if necessary, repair them ASM 323103 or ASM 323104.
         a If there is contamination, corrosion, bent or broken pins:
     (g) Connect the electrical connectors (18) to the NLG proximity sensors (14) and (17).
     (h) Apply Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) on the electrical connectors (18), ESPM 205450.
     (i) Do a check of the sealant on the bolts and the nuts of:
  • The targets (15) and (16)
  • The NLG proximity sensors (14) and (17)
  • The sensor mounting brackets (13) and (19).
       1 If the sealant is not in the correct condition:
         a Make sure that the bolts and the nuts are correctly tightened (Ref. AMM TASK 32-31-73-400-005).
         b Apply Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the bolts and the nuts (Ref. AMM TASK 32-31-73-400-005).
   (3) 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) through the grease nipple (7) to lubricate the pin (8) and the target lever (1).
NOTE: For lubricant grease specification and lubrication requirements, refer to (Ref. AMM D/O 12-22-00-00).
     (a) Make sure that the grease comes out from the two sides of the target lever (1).
       1 If the grease does not come out from the two sides of the target lever (1), do the steps that follow:
         a Remove the pin (8) (Ref. AMM TASK 32-21-45-000-801).
         b Clean the pin (8).
         c Make sure that the greasing paths are not clogged.
         d Install the pin (8) (Ref. AMM TASK 32-21-45-400-801).
   (4) Do a check of the fluid level and the charge pressure of the NLG shock absorber (Ref. AMM TASK 12-12-32-610-001).
   (5) Lift the aircraft on jacks (NLG only) (Ref. AMM TASK 07-11-00-581-003).
   (6) With the NLG shock absorber fully extended:
     (a) Do a check of dimension H:
       1 Make sure that dimension H is 449 mm (17.68 in.) +/- 2 mm (0.08 in.).
     (b) Make sure that:
  • The orange triangle (5) (mark for zero degree-alignment) on the NLG leg points to where the orange area (6) on the main fitting starts.
     (c) Do a check of the NLG torque-link assembly (Ref. AMM TASK 32-21-00-200-804).
       1 Move the elements of the flight/ground sensing mechanism smoothly.
       2 Make sure that there are no mechanical plays that can cause an incorrect position of the targets (15) and (16). Be very careful with the target lever (1) and the upper bolt (12) of the rod link (3).
       3 If you find defects and/or unwanted mechanical plays in the flight/ground sensing mechanism:
       4 Remove the torque-link center hinge (Ref. AMM TASK 32-21-27-000-002).
       5 Move the upper torque link to manually operate the flight/ground sensing mechanism.
       6 Make sure that the flight/ground sensing mechanism moves smoothly and there is no movement between:
  • The balls of the rod link bearing (10) and the bolt (9)
  • The balls of the rod link bearing (11) and the bolt (12).
         a If there is movement between the balls of the rod link bearing (10) and the bolt (9):
  • Replace the bolt (9).
         b If there is movement between the balls of the rod link bearing (11) and the bolt (12):
  • Replace the bolt (12).
         c If you find defects on the balls of the rod link bearing(s) (10) and/or (11):
         d If the rod link bearing(s) (10) and/or (11) cannot move freely:
       7 Install the torque-link center hinge (Ref. AMM TASK 32-21-27-400-002).
     (d) Do a check of the clearance between:
Subtask 32-21-00-210-076-A ** ON A/C NOT FOR ALL
B. General Visual Inspection of the NLG
F Flight-Ground Sensing-Mechanism with the Two Grease Nipples on the Pin ** ON A/C NOT FOR ALL
NOTE: This subtask is only applicable for the NLG with the two grease nipples on the pin (8) of the flight/ground sensing mechanism.
For the NLG with the one grease nipple on the pin (8) of the flight/ground sensing mechanism, go to para 4.A.
   (1) Do a general visual inspection of the NLG (Ref. AMM TASK 32-21-00-200-002).
   (2) Do a visual check of the NLG proximity sensors (14) and (17) and the related flight/ground sensing mechanism as follows:
     (a) Do a check of the target lever (1) and the rod link (3) for damage (wear, cracks or corrosion).
     (b) Do a check of the rod link bearings (10) and (11) for damage (wear, cracks, distortion or corrosion).
     (c) Do a check of the cover (2) that is attached to the turning tube.
       1 Make sure that the cover bolt (4) is not loose or missing.
     (d) If you find defects in the flight/ground sensing mechanism, replace the damaged parts, as necessary (Ref. AMM TASK 32-21-45-000-801) and (Ref. AMM TASK 32-21-45-400-801).
     (e) Do a check of the NLG proximity sensors (14) and (17).
       1 Make sure that NLG proximity sensors (14) and (17) are in the correct condition.
     (f) Do a check of the electrical connectors (18) as follows:
       1 Disconnect the electrical connectors (18) from the NLG proximity sensors (14) and (17).
       2 Do a check of pins A and B and if necessary, repair them ASM 323103 or ASM 323104.
         a If there is contamination, corrosion, bent or broken pins:
     (g) Connect the electrical connectors (18) to the NLG proximity sensors (14) and (17).
     (h) Apply Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) on the electrical connectors (18), ESPM 205450.
     (i) Do a check of the sealant on the bolts and the nuts of:
  • The targets (15) and (16)
  • The NLG proximity sensors (14) and (17)
  • The sensor mounting brackets (13) and (19).
       1 If the sealant is not in the correct condition:
         a Make sure that the bolts and the nuts are correctly tightened (Ref. AMM TASK 32-31-73-400-005).
         b Apply Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the bolts and the nuts (Ref. AMM TASK 32-31-73-400-005).
   (3) 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) through the grease nipples (7) to lubricate the pin (8) and the target lever (1).
NOTE: For lubricant grease specification and lubrication requirements, refer to (Ref. AMM D/O 12-22-00-00).
     (a) Make sure that the grease comes out from the target lever (1).
       1 If the grease does not come out from the two sides of the target lever (1), do the steps that follows:
         a Remove the pin (8) (Ref. AMM TASK 32-21-45-000-801).
         b Clean the pin (8).
         c Make sure that the greasing paths are not clogged.
         d Install the pin (8) (Ref. AMM TASK 32-21-45-400-801).
   (4) Do a check of the fluid level and the charge pressure of the NLG shock absorber (Ref. AMM TASK 12-12-32-610-001).
   (5) Lift the aircraft on jacks (NLG only) (Ref. AMM TASK 07-11-00-581-003).
   (6) With the NLG shock absorber fully extended:
     (a) Do a check of dimension H:
       1 Make sure that dimension H is 449 mm (17.68 in.) +/- 2 mm (0.08 in.).
     (b) Make sure that:
  • The orange triangle (5) (mark for zero degree-alignment) on the NLG leg points to where the orange area (6) on the main fitting starts.
     (c) Do a check of the NLG torque-link assembly (Ref. AMM TASK 32-21-00-200-804).
       1 Move the elements of the flight/ground sensing mechanism smoothly.
       2 Make sure that there are no mechanical plays that can cause an incorrect position of the targets (15) and (16). Be very careful with the target lever (1) and the upper bolt (12) of the rod link (3).
       3 If you find defects and/or unwanted mechanical plays in the flight/ground sensing mechanism:
       4 Remove the torque-link center hinge (Ref. AMM TASK 32-21-27-000-002).
       5 Move the upper torque link to manually operate the flight/ground sensing mechanism.
       6 Make sure that the flight/ground sensing mechanism moves smoothly and there is no movement between:
  • The balls of the rod link bearing (10) and the bolt (9)
  • The balls of the rod link bearing (11) and the bolt (12).
         a If there is movement between the balls of the rod link bearing (10) and the bolt (9):
  • Replace the bolt (9).
         b If there is movement between the balls of the rod link bearing (11) and the bolt (12):
  • Replace the bolt (12).
         c If you find defects on the balls of the rod link bearing(s) (10) and/or (11):
         d If the rod link bearing(s) (10) and/or (11) cannot move freely:
       7 Install the torque-link center hinge (Ref. AMM TASK 32-21-27-400-002).
     (d) Do a check of the clearance between:
5. Close-up
Subtask 32-21-00-860-100-A
A. Put the aircraft back to its initial configuration.
   (1) Lower the aircraft on its wheels (Ref. AMM TASK 07-11-00-586-001).
   (2) Remove the WARNING NOTICE(S).
   (3) Remove the safety barriers.
   (4) Make sure that the work area is clean and clear of tools and other items.
[Rev.10 from 2021] 2026.04.01 00:41:52 UTC
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