W DOC AIRBUS | AMM A320F

Removal of the MLG Actuating Cylinder

TASK 32-31-46-000-001-A
Removal of the MLG Actuating Cylinder

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: OBEY THE HYDRAULIC SAFETY PROCEDURES. WORK ON THE HYDRAULIC SYSTEMS CAN BE DANGEROUS.
ZONE: 571
ZONE: 671
ZONE: 731
ZONE: 741
FIN: 2503GM
FIN: 2504GM
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific
1
CONTAINER 3 L(3/4 USGAL)
No specific
1
HOIST 50 KG (110 LB)
No specific
AR
PLUG - BLANKING
No specific
AR
SAFETY BARRIER(S)
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
SCRAPER - NON METALLIC
No specific
AR
WARNING NOTICE(S)
98D32104009001
1
REM., INST. EQUIPMENT - MLG ACTUATOR
98D32104009003
1
EQUIPMENT-R I OF THE MLG ACTUATOR
98D32104009006
1
EQUIPMENT-R I OF THE MLG ACTUATOR
98D32104009007
1
EQUIPMENT-R I OF THE MLG ACTUATOR
98D57004019000
1
SLIPPER BLOCK(REAR SPAR ATTACHMENT BRACKET-ACTUATOR)
98D57004019001
1
SLIPPER BLOCK
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
571
MLG BAY
671
MLG BAY
731
L.H MAIN GEAR
741
R.H MAIN GEAR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 07-11-00-581-001-A
Lifting for Aircraft Maintenance Operations
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 29-00-00-864-001-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 29-23-00-860-001-A
Disconnection 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 32-00-00-860-001-A
Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01
Flight Configuration Precautions without Electrical Power
F Overwing Panel Cover-Plate
F MLG Actuating Cylinder - Removal/Installation Tools
F MLG Actuating Cylinder - Location and Detail ** ON A/C NOT FOR ALL
F MLG Actuating Cylinder - Location and Detail ** ON A/C NOT FOR ALL
F MLG Actuating Cylinder - Location and Detail ** ON A/C NOT FOR ALL
F MLG Actuating Cylinder - Location and Detail ** ON A/C NOT FOR ALL
F MLG Actuating Cylinder - Location and Detail ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 32-31-46-941-050-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 the 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.
   (4) Put WARNING NOTICE(S) to tell persons not to pressurize the hydraulic systems:
  • In the cockpit, on the HYD overhead panel 40VU
  • On the hydraulic ground service-panels 197CB and 198CB
  • On the access door 195BB.
Subtask 32-31-46-582-050-A
B. Lift the Aircraft
   (1) Lift the aircraft on jacks (Ref. AMM TASK 07-11-00-581-001).
Subtask 32-31-46-869-050-A
C. Flight Configuration Precautions
   (1) 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 operate the LGCIU circuit breakers.
   (2) If the electrical power is necessary, do the precautions for flight configuration with electrical power (Ref. AMM TASK 32-00-00-860-001) before you open the circuit breakers.
Subtask 32-31-46-865-050-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
Subtask 32-31-46-860-050-A
E. Aircraft Maintenance Configuration
   (1) Disconnect the isolation coupling of the power transfer unit (Ref. AMM TASK 29-23-00-860-001).
   (2) Make sure that the Green and Yellow hydraulic systems are depressurized
(Ref. AMM TASK 29-00-00-864-001).
   (3) Make sure that the applicable hydraulic reservoirs is depressurized (Ref. AMM TASK 29-14-00-614-001).
Subtask 32-31-46-010-050-B
F. Get Access
   (1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
     (a) FOR [2503GM] (ACTG CYL-MLG, L)
  • Below zone 571.
     (b) FOR [2504GM] (ACTG CYL-MLG, R)
  • Below zone 671.
   (2) Remove the cover plates (1) and (2) as follows:
F Overwing Panel Cover-Plate
WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
     (a) Remove and discard the cotter pins (8) and (9).
     (b) Remove the nuts (6) and (7), the bridge plates (3) and (4).
     (c) Remove the cover plates (1) and (2).
Subtask 32-31-46-480-050-C ** ON A/C NOT FOR ALL
G. Installation of the Support Equipment
   (1) Install the grommet (5).
   (2) Put the tool in position on the wing:
  • 98D32104009001 REM., INST. EQUIPMENT - MLG ACTUATOR (15) and the HOIST 50 KG (110 LB), or
  • 98D32104009003 EQUIPMENT-R I OF THE MLG ACTUATOR (15), or
  • 98D32104009006 EQUIPMENT-R I OF THE MLG ACTUATOR (15) and the HOIST 50 KG (110 LB), or
  • 98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15).
   (3) Put the 98D57004019000 SLIPPER BLOCK(REAR SPAR ATTACHMENT BRACKET-ACTUATOR) in position to prevent the area from damage.
   (4) Put the CONTAINER 3 L(3/4 USGAL) below the applicable actuating cylinder.
Subtask 32-31-46-480-050-D ** ON A/C NOT FOR ALL
G. Installation of the Support Equipment
   (1) Install the grommet (5).
   (2) Put the tool in position on the wing:
  • 98D32104009001 REM., INST. EQUIPMENT - MLG ACTUATOR (15) and the HOIST 50 KG (110 LB), or
  • 98D32104009003 EQUIPMENT-R I OF THE MLG ACTUATOR (15), or
  • 98D32104009006 EQUIPMENT-R I OF THE MLG ACTUATOR (15) and the HOIST 50 KG (110 LB), or
  • 98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15).
   (3) Put the 98D57004019001 SLIPPER BLOCK in position to prevent the area from damage.
   (4) Put the CONTAINER 3 L(3/4 USGAL) below the applicable actuating cylinder.
Subtask 32-31-46-480-050-E ** ON A/C NOT FOR ALL
G. Installation of the Support Equipment
   (1) Install the grommet (5).
   (2) Put the 98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15) in position on the wing.
   (3) Put the 98D57004019000 SLIPPER BLOCK(REAR SPAR ATTACHMENT BRACKET-ACTUATOR) in position to prevent the area from damage.
   (4) Put the CONTAINER 3 L(3/4 USGAL) below the applicable actuating cylinder.
4. Procedure
Subtask 32-31-46-020-050-C ** ON A/C NOT FOR ALL
A. Removal of the MLG Actuating Cylinder
WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.
   (1) Use the 98D32104009001 REM., INST. EQUIPMENT - MLG ACTUATOR (15) or the 98D32104009003 EQUIPMENT-R I OF THE MLG ACTUATOR (15) or the 98D32104009006 EQUIPMENT-R I OF THE MLG ACTUATOR (15) or the 98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15) to hold the actuating cylinder 38 kg (83.8 lb).
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.
   (2) Remove and discard the lockwire from the unions of the flexible hoses (21) and (22).
   (3) Disconnect the unions of the flexible hoses (21) and (22) from the actuating cylinder manifold (23).
   (4) Put the PLUG-BLANKING in each disconnected line end.
   (5) Attach the flexible hoses (21) and (22) to the adjacent structure.
     (a) Make sure that there are no kinks on the flexible hoses (21) and (22).
   (6) Use theSCRAPER - NON METALLIC and remove the sealant from:
  • The bolt (29) and the nut (34)
  • The bolt (41) and the nut (38).
   (7) Remove and discard the cotter pin (35).
   (8) Remove the nut (34), the washer (33), the cap (32) and the bolt (29).
   (9) Remove and discard the cotter pin (37).
   (10) Remove the nut (38), the washer (39), the nylon-washer (40) and the bolt (41).
   (11) Remove the collar (36).
   (12) Remove the pins (20) and (27) and the washers (30) and (43).
   (13) Carefully remove the actuating cylinder.
Subtask 32-31-46-020-050-D ** ON A/C NOT FOR ALL
A. Removal of the MLG Actuating Cylinder
WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.
   (1) Use the 98D32104009001 REM., INST. EQUIPMENT - MLG ACTUATOR (15) or the 98D32104009003 EQUIPMENT-R I OF THE MLG ACTUATOR (15) or the 98D32104009006 EQUIPMENT-R I OF THE MLG ACTUATOR (15) or the 98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15) to hold the actuating cylinder 38 kg (83.8 lb).
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.
   (2) Remove and discard the lockwire from the unions of the flexible hoses (21) and (22).
   (3) Disconnect the unions of the flexible hoses (21) and (22) from the actuating cylinder manifold (23).
   (4) Put the PLUG-BLANKING in each disconnected line end.
   (5) Attach the flexible hoses (21) and (22) to the adjacent structure.
     (a) Make sure that there are no kinks on the flexible hoses (21) and (22).
   (6) Use theSCRAPER - NON METALLIC and remove the sealant from:
  • The bolt (28) and the nut (33)
  • The bolt (41) and the nut (36).
   (7) Remove and discard the cotter pin (34).
   (8) Remove the:
  • Nut (33)
  • Washer (32)
  • Cap (31)
  • Bolt (28).
   (9) Remove and discard the cotter pin (35).
   (10) Remove the:
  • Nut (36)
  • Washer (37)
  • Washer (38), if installed
  • Nylon-washer (39)
  • Washer (40), if installed
  • Bolt (41)
  • Collar (42).
   (11) Remove the pins (20) and (26) and the washers (29) and (43).
   (12) Carefully remove the actuating cylinder.
Subtask 32-31-46-020-050-F ** ON A/C NOT FOR ALL
A. Removal of the MLG Actuating Cylinder
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.
WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.
   (1) Use the 98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15) to hold the actuating cylinder 38 kg (83.8 lb).
   (2) Remove and discard the lockwire from the unions of the flexible hoses (21) and (22).
   (3) Disconnect the unions of the flexible hoses (21) and (22) from the actuating cylinder manifold (23).
   (4) Put the PLUG-BLANKING in each disconnected line end.
   (5) Attach the flexible hoses (21) and (22) to the adjacent structure. Do not put kinks in them.
     (a) Make sure that there are no kinks on the flexible hoses (21) and (22).
   (6) Use theSCRAPER - NON METALLIC and remove the sealant from:
  • The bolt (34) and the cap (29)
  • The bolt (35) and the nut (39).
   (7) Remove and discard the cotter pin (28).
   (8) Remove the:
  • Nut (29)
  • Washer (30)
  • Cap (27)
  • Bolt (34).
   (9) Remove and discard the cotter pin (40).
   (10) Remove the:
  • Nut (39)
  • Washer (38)
  • Nylon-washer (37)
  • Bolt (35)
  • Collar (36).
   (11) Remove the:
  • Pins (20) and (32)
  • Washers (26) and (42).
   (12) Carefully remove the actuating cylinder.
Subtask 32-31-46-020-050-G ** ON A/C NOT FOR ALL
A. Removal of the MLG Actuating Cylinder
WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.
CAUTION: MAKE SURE THAT THE FLUID DOES NOT STAY ON THE AIRCRAFT STRUCTURE. IF THE FLUID GETS ON THE AIRCRAFT STRUCTURE, WASH IT OFF IMMEDIATELY WITH SOAP AND WATER.
   (1) Use the 98D32104009001 REM., INST. EQUIPMENT - MLG ACTUATOR (15) or the 98D32104009003 EQUIPMENT-R I OF THE MLG ACTUATOR (15) or the 98D32104009006 EQUIPMENT-R I OF THE MLG ACTUATOR (15) or the 98D32104009007 EQUIPMENT-R I OF THE MLG ACTUATOR (15) to hold the actuating cylinder 38 kg (83.8 lb).
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.
   (2) Remove and discard the lockwire from the unions of the flexible hoses (21) and (22).
   (3) Disconnect the unions of the flexible hoses (21) and (22) from the actuating cylinder manifold (23).
   (4) Put the PLUG-BLANKING in each disconnected line end.
   (5) Attach the flexible hoses (21) and (22) to the adjacent structure.
     (a) Make sure that there are no kinks on the flexible hoses (21) and (22).
   (6) Use the SCRAPER - NON METALLIC and remove the sealant from:
  • The bolt (28) and the nut (33)
  • The bolt (39) and the nut (36).
   (7) Remove and discard the cotter pin (34).
   (8) Remove the nut (33), the washer (32), the cap (31) and the bolt (28).
   (9) Remove and discard the cotter pin (35).
   (10) Remove the nut (36), the washer (37), the nylon-washer (38) and the bolt (39).
   (11) Remove the collar (40).
   (12) Remove the pins (20) and (26) and the washers (29) and (41).
   (13) Carefully remove the actuating cylinder.
[Rev.10 from 2021] 2026.04.01 00:45:32 UTC
"Aviabrain" 2025