W DOC AIRBUS | AMM A320F

Adjustment of the MLG Door Open Proximity Sensors

TASK 32-31-73-820-003-A
Adjustment of the MLG Door Open 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.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
FIN: 32GA ** ON A/C NOT FOR ALL
FIN: 33GA ** ON A/C NOT FOR ALL
FIN: 34GA ** ON A/C NOT FOR ALL
FIN: 35GA ** ON A/C NOT FOR ALL
1. Reason for the Job
To set the clearances of the MLG door open 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
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 0.192 and 0.124 m.daN (16.99 and 10.97 lbf.in ) T
No specific
Torque wrench: range to between 0.192 and 0.125 m.daN (16.99 and 11.06 lbf.in ) T
460005835
1
SLEEVE - GROUND LOCK
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.06AAB1)
Polysulfide Sealant-General Purpose Fillet -
 C. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
15
SPACER
AIPC 32-31-03-26-070
8
SPACER
AIPC 32-31-03-26-070
14
SPACER
AIPC 32-31-03-26-075
7
SPACER
AIPC 32-31-03-26-075
15
SPACER
AIPC 32-31-83-26-050
8
SPACER
AIPC 32-31-83-26-050
14
SPACER
AIPC 32-31-83-26-060
7
SPACER
AIPC 32-31-83-26-060
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 29-10-00-863-001-A
Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-001-A
Depressurize the Green Hydraulic System
TASK 32-00-00-481-001-A
Installation of the Safety Devices on the Landing Gears
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
F MLG Door Open Proximity Sensors 32GA, 33GA, 34GA, 35GA - Adjustment Dimensions
F MLG Door Open Proximity Sensors 32GA, 33GA, 34GA, 35GA - Adjustment
3. Job Set-up
Subtask 32-31-73-941-060-A
A. Safety Precautions
   (1) Put the safety barriers in position.
   (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 MLG doors.
Subtask 32-31-73-010-058-A
B. Get Access
   (1) Open the applicable MLG door (Ref. AMM TASK 32-12-00-010-001).
   (2) Put the ACCESS PLATFORM 2M (6 FT) in position at zone 734(744) for the applicable MLG door.
   (3) Put the 460005835 SLEEVE - GROUND LOCK on the applicable MLG door actuator.
Subtask 32-31-73-860-061-A
C. Depressurize Hydraulic Systems
   (1) Depressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-864-001).
Subtask 32-31-73-865-073-A
D. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUL/G/LGCIU/SYS1/NORM1GAC09
** ON A/C NOT FOR ALL
121VULGCIU/BAT SPLY/SYS259GAR33
121VULGCIU/BAT SPLY/SYS158GAR32
** ON A/C ALL
121VUHYDRAULIC/LGCIU/SYS22GAQ35
121VUHYDRAULIC/LGCIU/SYS1/GRND SPLY52GAQ34
** ON A/C NOT FOR ALL
121VULGCIU/BAT SPLY/SYS259GAR32
121VULGCIU/BAT SPLY/SYS158GAR31
4. Procedure
Subtask 32-31-73-220-083-A
A. Dimensional Check
   (1) Measure the dimension Z between each proximity sensor and its target. The correct dimension should be 2.0 mm (0.0787 in.) +/- 0.5 mm (0.0197 in.).
   (2) If the dimension Z is incorrect, do the adjustment procedure in Para 4.B.(1), steps (a) thru (n).
   (3) Measure the dimension X between the center line of each proximity sensor and its target. The correct dimension must be to a maximum of 3.5 mm (0.1378 in.) each side of the center line.
   (4) If the dimension X is incorrect, do the adjustment procedure in Para 4.B.(2), steps (a) thru (i).
Subtask 32-31-73-820-052-A
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
B. Adjustment of the MLG Door Open Proximity Sensors 32GA, 33GA, 34GA, 35GA
NOTE: It is permitted to install a sensor target without a spacer if the correct clearance can be set without the spacer.
   (1) If the dimension Z is incorrect, do the steps that follow:
     (a) Disconnect the electrical connector (3) from the applicable proximity sensor (4):
  • For System 1, LH, disconnect FIN 33GA
  • For System 1, RH, disconnect FIN 32GA
  • For System 2, LH, disconnect FIN 35GA
  • For System 2, RH, disconnect FIN 34GA.
     (b) Put a blanking cap on the disconnected electrical connector (3).
     (c) Remove the nuts (12), the washers (13) and the bolts (1).
     (d) Remove the proximity sensor (4) from the sensor mounting bracket (2) with the spacers (14) and/or (15) if installed.
     (e) Make sure that the sensor mounting bracket (2) is in the correct condition.
     (f) To decrease the dimension Z, add the 0.5 mm (0.0197 in.) AIPC 32-31-03-26-075 SPACER (14) or AIPC 32-31-83-26-060 SPACER (14) and/or the 2.0 mm (0.0787 in.) AIPC 32-31-03-26-070 SPACER (15) or AIPC 32-31-83-26-050 SPACER (15) as necessary.
     (g) To increase the dimension Z, remove the 0.5 mm (0.0197 in.) AIPC 32-31-03-26-075 SPACER (14) or AIPC 32-31-83-26-060 SPACER (14) and/or the 2.0 mm (0.0787 in.) AIPC 32-31-03-26-070 SPACER (15) or AIPC 32-31-83-26-050 SPACER (15) as required.
     (h) Put the proximity sensor (4) in position on the sensor mounting bracket (2) with the spacers (14) and/or (15) if necessary.
     (i) Install the bolts (1), the washers (13) and the nuts (12).
     (j) TORQUE the nuts (12) to between 0.192 and 0.125 m.daN (16.99 and 11.06 lbf.in ) T.
     (k) Apply Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the bolts (1) and the nuts (12).
     (l) Remove the blanking cap from the electrical connector (3).
     (m) Make sure that the electrical connector (3) is in the correct condition.
     (n) Connect the applicable electrical connector (3) to the applicable proximity sensor (4):
  • For System 1, LH, connect FIN 33GA
  • For System 1, RH, connect FIN 32GA
  • For System 2, LH, connect FIN 35GA
  • For System 2, RH, connect FIN 34GA.
   (2) If the dimension X is incorrect, do the steps that follow:
     (a) Remove the nuts (10), the washers (11) and the bolts (5).
     (b) Remove the target (6) from the target mounting bracket (9) with the spacers (7) and/or (8) if installed.
     (c) Make sure that the target mounting bracket (9) is in the correct condition.
     (d) To move the target outboard, add the 2.0 mm (0.0787 in.) AIPC 32-31-03-26-075 SPACER (7) or AIPC 32-31-83-26-060 SPACER (7) and/or the 0.5 mm (0.0197 in.) AIPC 32-31-03-26-070 SPACER (8) or AIPC 32-31-83-26-050 SPACER (8) as necessary.
     (e) To move the target inboard, remove the 2.0 mm (0.0787 in.) AIPC 32-31-03-26-075 SPACER (7) or AIPC 32-31-83-26-060 SPACER (7) and/or the 0.5 mm (0.0197 in.) AIPC 32-31-03-26-070 SPACER (8) or AIPC 32-31-83-26-050 SPACER (8) as necessary.
     (f) Put the target (6) in position on the target mounting bracket (9) with the spacers (7) and/or (8) as necessary.
     (g) Install the bolts (5), the washers (11) and the nuts (10).
     (h) TORQUE the nuts (10) to between 0.192 and 0.124 m.daN (16.99 and 10.97 lbf.in ) T.
     (i) Apply Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the bolts (5) and the nuts (10).
Subtask 32-31-73-865-074-A
C. Close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUL/G/LGCIU/SYS1/NORM1GAC09
** ON A/C NOT FOR ALL
121VULGCIU/BAT SPLY/SYS259GAR33
121VULGCIU/BAT SPLY/SYS158GAR32
** ON A/C ALL
121VUHYDRAULIC/LGCIU/SYS22GAQ35
121VUHYDRAULIC/LGCIU/SYS1/GRND SPLY52GAQ34
** ON A/C NOT FOR ALL
121VULGCIU/BAT SPLY/SYS259GAR32
121VULGCIU/BAT SPLY/SYS158GAR31
Subtask 32-31-73-860-062-A
D. Pressurize Hydraulic Systems
   (1) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001).
Subtask 32-31-73-410-058-A
E. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Remove the 460005835 SLEEVE - GROUND LOCK from the applicable MLG door actuator.
   (3) Remove the access platform(s).
   (4) Close the MLG doors (Ref. AMM TASK 32-12-00-410-001).
5. Close-up
Subtask 32-31-73-942-059-A
A. 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.
[Rev.10 from 2021] 2026.04.01 00:45:59 UTC
"Aviabrain" 2025