W DOC AIRBUS | AMM A320F

Installation of the Actuator of the NLG Uplock Assy

TASK 32-31-21-400-002-A
Installation of the Actuator of the NLG Uplock Assy

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
ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific
AR
CONTAINER 5 L (1.32 USGAL)
No specific
AR
SAFETY BARRIER(S)
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.06LDG2)
Non Hardening Jointing Putty-High Temp. Area - Structure
(Material No.08BBB1)
Non Aqueous Cleaner-- Petroleum Based -
(Material No.14QFB1)
Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 29-00-00-864-001-A
Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-14-00-614-001-A
Depressurization of the Hydraulic Reservoirs
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 32-30-00-867-001-A
Retraction of the Landing Gears for Maintenance
TASK 32-30-00-867-002-A
Extension of the Landing Gears after Maintenance
TASK 32-31-00-720-003-A
Functional Test of the Normal Extension and Retraction of the Nose Landing Gear
F Actuator of the NLG Uplock Assy
3. Job Set-up
Subtask 32-31-21-860-053-A
A. Aircraft Maintenance Configuration
   (1) Make sure that the Green hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001)
   (2) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
   (3) In the cockpit, on the panel 400VU, make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to operate the landing gear control lever.
   (4) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Green hydraulic system:
  • on the panel 40VU in the cockpit,
  • on the ground service panel of the Green hydraulic system, access door (197CB).
   (5) Make sure that the SAFETY BARRIER(S) are in position.
   (6) Make sure that the CONTAINER 5 L (1.32 USGAL) is in position below the NLG uplock assy (2530GM).
   (7) Make sure that the doors of the nose landing gear are open (Ref. AMM TASK 32-22-00-010-001).
   (8) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position in zone 123.
   (9) Make sure that you obeyed the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).
Subtask 32-31-21-865-055-A
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUL/G/LGCIU/SYS1/NORM1GAC09
121VUHYDRAULIC/LGCIU/SYS22GAQ35
121VUHYDRAULIC/LGCIU/SYS1/GRND SPLY52GAQ34
4. Procedure
Subtask 32-31-21-110-051-A
A. Preparation for Installation
   (1) Clean the surfaces and the connection elements with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and dry with filtered compressed air.
   (2) Apply Non Hardening Jointing Putty-High Temp. Area - Structure (Material No.06LDG2) to the threads of the screws (1).
Subtask 32-31-21-420-053-A
B. Installation of the Actuator of the NLG Uplock Assy
   (1) Put the actuator (2) in position on the NLG uplock.
   (2) Install and tighten the three screws (1) on the actuator (2).
   (3) Safety the three screws (1) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
   (4) Remove the blanking plugs from the disconnected line ends of the hydraulic lines (3) and (4).
   (5) Connect the hydraulic lines (3) and (4) to the actuator (2).
   (6) TORQUE the hydraulic lines (3) and (4) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft ) T.
Subtask 32-31-21-865-056-A
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUL/G/LGCIU/SYS1/NORM1GAC09
121VUHYDRAULIC/LGCIU/SYS22GAQ35
121VUHYDRAULIC/LGCIU/SYS1/GRND SPLY52GAQ34
Subtask 32-31-21-869-054-A
D. After you close the LGCIU circuit breakers, put the aircraft back to the correct (ground) condition (Ref. AMM TASK 32-00-00-860-002).
Subtask 32-31-21-941-055-A
E. Preparation for the Test
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Remove the container below the NLG uplock assy (2530GM).
   (3) Make sure that the NLG uplock assy (2530GM) is in the open configuration.
   (4) Make sure that the travel range of the landing gear is clean.
   (5) Remove the access platform below the NLG uplock assy (2530GM).
   (6) Close the NLG doors (Ref. AMM TASK 32-22-00-410-001).
   (7) Do 5 full retraction and extension cycles of the nose landing gear at very low speed to bleed the Green hydraulic system (Ref. AMM TASK 32-30-00-867-001) and (Ref. AMM TASK 32-30-00-867-002).
Subtask 32-31-21-720-051-A
F. Functional Test
   (1) Do the operational test of the NLG normal extension and retraction (Ref. AMM TASK 32-31-00-720-003).
   (2) Make sure that there are no leaks on the disconnected line ends.
5. Close-up
Subtask 32-31-21-410-051-A
A. Close Access
   (1) Remove the WARNING NOTICE(S).
   (2) Remove the access platform(s).
   (3) Make sure that the work area is clean and clear of tools and other items.
   (4) Close the doors of the nose landing gear (Ref. AMM TASK 32-22-00-410-001).
[Rev.10 from 2021] 2026.04.01 00:44:48 UTC
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