W DOC AIRBUS | AMM A320F

Installation of the 1M and 2M Harnesses on the MLG Leg

TASK 32-11-43-400-002-A
Installation of the 1M and 2M Harnesses on the MLG Leg

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.
ZONE: 731
ZONE: 741
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 2M (6 FT)
No specific
AR
SAFETY BARRIER(S)
No specific
1
WARNING NOTICE(S)
No specific
Torque wrench: range to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T
No specific
Torque wrench: range to between 1.0 and 0.8 m.daN (88.50 and 70.80 lbf.in ) T
No specific
Torque wrench: range to between 3.1 and 2.7 m.daN (22.86 and 19.91 lbf.ft ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.03JBA1)
Silicone base Grease-General Purpose - -
(Material No.04JMD3)
Top Coat Polyurethane-- Decorative External Structure
(Material No.05BAB1)
Threadlocking Adhesive-- Low strength Low viscosity -
(Material No.06AAB1)
Polysulfide Sealant-General Purpose Fillet -
(Material No.06AAC5)
Polysulfide Sealant-General Purpose Interfay Landing Gear
(Material No.06CMD9)
Silicone Adhesive Sealant-General Purpose One part legacy
(Material No.06LDG6)
Non Hardening Jointing Putty-High Temp. Area - Hydraulic
(Material No.08BAA9)
Non Aqueous Cleaner-General - -
(Material No.08BBB1)
Non Aqueous Cleaner-- Petroleum Based -
(Material No.14QFB1)
Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)
Textile-Lint free Cotton -
(Material No.14TAC1)
Article-- Wax Crayon -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
731
L.H MAIN GEAR
741
R.H MAIN GEAR
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
13
TAB WASHERS
AIPC 32-11-11-81-070
18
TAB WASHERS
AIPC 32-11-11-81-070
31
COTTER PINS
AIPC 32-11-12-03-065
18
TAB WASHERS
AIPC 32-11-85-81-070
 E. Referenced Information
REFERENCE
DESIGNATION
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 32-00-00-481-001-A
Installation of the Safety Devices on the Landing Gears
TASK 32-11-43-400-003-A
Installation of the 1M and 2M Harnesses on the MLG Axle
TASK 32-11-46-400-001-A
Installation of the MLG Disconnection Box
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
TASK 32-12-14-000-001-A
Removal of the MLG Fixed Fairing Assembly
TASK 32-12-14-400-001-A
Installation of the MLG Fixed Fairing Assembly (That was Removed For Access Only)
TASK 32-42-00-710-001-A
Operational Check of the Normal Braking System
TASK 32-42-00-720-002-A
Functional Test of the Tachometers and the Anti-Skid System with the Normal Braking System ON
TASK 32-47-00-710-001-A
Operational Test of the Brake Temperature System
TASK 32-47-18-400-001-A
Installation of the Brake Temperature Monitoring-Unit
TASK 32-48-00-710-001-A
Functional Test of The Brake Cooling System
TASK 32-69-00-740-001-A
BITE Check of Landing-Gear Control Interface-Unit (LGCIU) With Use of MCDU to Ensure that Continuous BITE is Operative
TASK 57-51-37-400-008-A
Installation of the Access Door
TASK 57-51-42-400-001-A
Installation of the Overwing Panel Protection
F MLG Harnesses 1M and 2M - Lockstay Harness Detail
F MLG Harnesses 1M and 2M ** ON A/C NOT FOR ALL
F MLG Harnesses 1M and 2M - Location and Detail ** ON A/C NOT FOR ALL
F MLG Harnesses 1M and 2M - Location and Detail
F MLG Harnesses 1M and 2M - Location and Detail ** ON A/C NOT FOR ALL
3. Job Set-up
Subtask 32-11-43-941-053-A
A. Safety Precautions
   (1) Make sure that the SAFETY BARRIER(S) are in position.
   (2) Make sure that the ground safety locks are 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
  • Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the landing gear.
Subtask 32-11-43-869-056-A
B. Flight Configuration Precautions
   (1) If you did not open the LGCIU circuit breakers, make sure that the electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002).
Subtask 32-11-43-865-056-A
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
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 32-11-43-860-051-A ** ON A/C NOT FOR ALL
D. Aircraft Maintenance Configuration
   (1) Make sure that the applicable MLG door is open (Ref. AMM TASK 32-12-00-010-001).
   (2) Make sure that the ACCESS PLATFORM 2M (6 FT) is adjacent to the applicable MLG.
   (3) Make sure that the applicable access panel is open 574AB(674AB).
   (4) Make sure that the MLG fixed fairing is removed (Ref. AMM TASK 32-12-14-000-001).
Subtask 32-11-43-860-051-C ** ON A/C NOT FOR ALL
D. Aircraft Maintenance Configuration
   (1) Make sure that the applicable MLG door is open (Ref. AMM TASK 32-12-00-010-001).
   (2) Make sure that the ACCESS PLATFORM 2M (6 FT) is adjacent to the applicable MLG.
   (3) Make sure that the applicable access panel is removed 574AB(674AB).
   (4) Make sure that the MLG fixed fairing is removed (Ref. AMM TASK 32-12-14-000-001).
4. Procedure
WARNING: MAKE SURE THAT THE INSTALLATION AND ROUTING OF ALL ELECTRICAL CABLES AGREE WITH THE REQUIREMENTS OF THE ELECTRICAL STANDARD PRACTICES MANUAL.
Subtask 32-11-43-420-065-A ** ON A/C NOT FOR ALL
A. Preparation For Installation
   (1) Clean the component interfaces and the adjacent areas with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Make sure that the parts retained from the removed component are clean and in the correct condition.
   (4) Make sure that all the electrical connections are clean and in the correct condition.

F MLG Harnesses 1M and 2M ** ON A/C NOT FOR ALL
   (5) On the 2M harness measure, and mark with a Article-- Wax Crayon - (Material No.14TAC1) , the dimension Z. The dimension Z must be 345 mm (13.5827 in.).
Subtask 32-11-43-420-065-C ** ON A/C NOT FOR ALL
A. Preparation For Installation
   (1) Clean the component interfaces and the adjacent areas with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Make sure that the parts retained from the removed component are clean and in the correct condition.
   (4) Make sure that all the electrical connections are clean and in the correct condition.
Subtask 32-11-43-420-065-D ** ON A/C NOT FOR ALL
A. Preparation For Installation
   (1) Clean the component interfaces and the adjacent areas with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Make sure that the parts retained from the removed component are clean and in the correct condition.
   (4) Make sure that all the electrical connections are clean and in the correct condition.
   (5) On the 2M harness, measure and mark with a Article-- Wax Crayon - (Material No.14TAC1) , the dimension Z. The dimension Z must be 345 mm (13.58 in.).
Subtask 32-11-43-420-065-E ** ON A/C NOT FOR ALL
A. Preparation For Installation
   (1) Clean the component interfaces and the adjacent areas with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Make sure that the parts retained from the removed component are clean and in the correct condition.
   (4) Make sure that all the electrical connections are clean and in the correct condition.
Subtask 32-11-43-420-075-R ** ON A/C NOT FOR ALL
B. Installation of the 1M and 2M Harnesses on the MLG Leg
F MLG Harnesses 1M and 2M - Location and Detail ** ON A/C NOT FOR ALL
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.
   (1) Put the 1M and 2M harnesses on the MLG leg in the correct routing.
   (2) Make sure that there are no kinks in the harnesses.
   (3) For the 1M harness:
     (a) Install the P-clips (43) to the 1M harness.
     (b) Install the P-clips (43) to the bracket (46) with the bolts (42), the washers (44) and the nuts (45).
     (c) TORQUE the nuts (45) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ) T.
   (4) For the 2M harness:
     (a) Install the P-clips (48) to the 2M harness.
     (b) Install the P-clips (48) to the bracket (51) with the bolts (47), the washers (49) and the nuts (50).
     (c) TORQUE the nuts (50) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ) T.
   (5) Position the harnesses on the brackets (5):
   (6) Paint a red line of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) across the nuts (6).
   (7) Safety the nuts (6) together with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
   (8) For the 2M harness:
     (a) If the bracket (3) was not removed, do as follows:
       1 Put the harness in the bracket (3).
       2 TORQUE the nuts (4) to between 3.1 and 2.7 m.daN (22.86 and 19.91 lbf.ft ) T.
       3 Paint a red line of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) across the nuts (4).
       4 Safety the nuts (4) together with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
     (b) If the bracket (3) was removed, do as follows:
       1 Put the harness in the bracket (3).
       2 Install the bracket (3) with the new AIPC 32-11-11-81-070 TAB WASHERS (18) or AIPC 32-11-85-81-070 TAB WASHERS (18) and the bolts (17).
       3 TORQUE the bolts (17) to between 1.0 and 0.8 m.daN (88.50 and 70.80 lbf.in ) T.
       4 Paint a red line of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) across the nuts (4).
       5 Safety the bolts (17) with the tab washers (18).
       6 TORQUE the nut (4) to between 3.1 and 2.7 m.daN (22.86 and 19.91 lbf.ft ) T.
       7 Safety the nuts (4) together with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
CAUTION: MAKE SURE THAT ALL ELECTRICAL CONNECTORS ARE IDENTIFIED WITH THEIR FIN NO. TO CORRECTLY CONNECT EACH PLUG TO ITS RELATED RECEPTACLE. INCORRECT CONNECTION OF THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO THE AIRCRAFT ELECTRICAL SYSTEM.
   (9) Remove the CAP-BLANKING from each electrical connector and receptacle.
   (10) For the 1M harness:
     (a) Install the electrical connector (8) on the bracket (64) as follows:
       1 Fully loosen the electrical connector (8) backshell.
       2 Pull back the conduit a small distance to show the inner cables.
       3 Carefully move the cables through the slot in the bracket (64).
       4 Attach the electrical connector (8) to the bracket (64) with the:
  • cap screws (63)
  • washers (65)
  • nuts (66).
NOTE: A minimum of half a thread must show through the nuts (66) after the cap screws (63) are fully tightened.
     (b) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to the threads of the electrical connector (8) and fully tighten the backshell.
     (c) Connect the 1M axle harness electrical plug to the electrical connector (8) (Ref. AMM TASK 32-11-43-400-003).
     (d) Install the P-clips (40) to the 1M harness.
     (e) Install the P-clips (40) to the bracket (37) with the bolts (41), the washers (39) and the nuts (38).
     (f) TORQUE the nuts (38) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ) T.
     (g) Install the P-clips (56) to the 1M harness.
     (h) Install the P-clips (56) to the bracket (55) with the bolts (54), the washers (57) and the nuts (58).
     (i) TORQUE the nuts (58) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ) T.
     (j) Install the P-clips (15) to the 1M harness.
     (k) Apply Non Hardening Jointing Putty-High Temp. Area - Hydraulic (Material No.06LDG6) to the shank and the threads of the bolts (14).
     (l) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to the threads of the bolts (14).
     (m) Install the P-clips (15) on the leg assembly with the bolts (14) and the washers (16).
     (n) TORQUE the bolts (14) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ) T.
     (o) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to threads of the electrical connector backshells and connect the electrical connectors that follow:
  • 21GA-A (20GA-A) (7)
  • 15GA-A (14GA-A) (13)
  • 13GG-A (12GG-A) (71)
  • 17GG-A (16GG-A) (72).
     (p) Connect the electrical connector (9) to the monitoring unit 3GW-A (2GW-A) (Ref. AMM TASK 32-47-18-400-001).
     (q) Make sure the connectors are aligned with the harness to prevent kinks in the harness.
     (r) Connect the electrical connector 4027VC (4028VC) (2) at the MLG disconnection box (Ref. AMM TASK 32-11-46-400-001).
   (11) For the 2M harness:
     (a) Install the electrical connector (10) on the bracket (59) as follows:
       1 Fully loosen the electrical connector (10) backshell.
       2 Pull back the conduit a small distance to show the inner cables.
       3 Carefully move the cables through the slot in the bracket (59).
       4 Attach the electrical connector (10) to the bracket (59) with the:
  • cap screws (60)
  • washers (61)
  • nuts (62).
NOTE: A minimum of half a thread must show through the nuts (62) after the cap screws (60) are fully tightened.
     (b) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to the thread of the electrical connector (10) and fully tighten the backshell.
     (c) Connect the 2M axle harness electrical plug to the electrical connector (10) (Ref. AMM TASK 32-11-43-400-003).
     (d) Install the P-clips (56) to the 2M harness.
     (e) Install the P-clips (56) to the bracket (55) with the bolts (56), the washers (57) and the nuts (58).
     (f) TORQUE the nuts (58) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ) T.
     (g) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to the threads of the electrical connector backshells and connect the electrical connectors that follow:
  • 23GA-A (22GA-A) (11)
  • 17GA-A (16GA-A) (12)
  • 11GG-A (14GG-A) (70)
  • 15GG-A (18GG-A) (73).
     (h) Make sure the connectors are aligned with the harness to prevent kinks in the harness.
     (i) Connect the electrical connector 4029VC (4030VC) (1).
     (j) Install the plug (91) in the liner (90). Do not tighten the screw (92).
F MLG Harnesses 1M and 2M - Location and Detail ** ON A/C NOT FOR ALL
     (k) Align the end of the protective sleeve of the 2M harness with the inboard face of the plug (91).
     (l) Tighten the screw (92) sufficiently to safety the plug (91).
   (12) Put the guide blocks (27) in position on the applicable harness.
   (13) Install the guide blocks (27) with the bolts (26), the washers (28) and the nuts (29).
   (14) TORQUE the nuts (29) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ) T.
   (15) Put the line-support block assembly (31) in position on the applicable harness. Loosely install the bolts (30), the washers (32) and the nuts (33).
   (16) Make sure that the dimension X for the 1M harness is 150 mm (5.91 in.).
   (17) Make sure that the dimension Y for the 2M harness is 280 mm (11.02 in.).
   (18) TORQUE the nuts (33) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ) T.
   (19) Put the band-clamps (24) in position around the line-support blocks.
   (20) Visually inspect each harness for correct routing and installation.
   (21) Tighten the band-clamp nuts (25).
   (22) Paint a red line of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) across the electrical connectors that you have tightened.
Subtask 32-11-43-420-075-S ** ON A/C NOT FOR ALL
B. Installation of the 1M and 2M Harnesses on the MLG Leg
F MLG Harnesses 1M and 2M - Location and Detail ** ON A/C NOT FOR ALL
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.
   (1) Put the 1M and 2M harnesses on the MLG leg in the correct routing.
   (2) Make sure that there are no kinks in the harnesses.
   (3) For the 1M harness:
     (a) Install the P-clips (43) to the 1M harness.
     (b) Install the P-clips (43) to the bracket (46) with the bolts (42), the washers (44) and the nuts (45).
     (c) TORQUE the nuts (45) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
   (4) For the 2M harness:
     (a) Install the P-clips (48) to the 2M harness.
     (b) Install the P-clips (48) to the bracket (51) with the bolts (47), the washers (49) and the nuts (50).
     (c) TORQUE the nuts (50) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
   (5) Position the harnesses on the brackets (5):
   (6) Paint a red line of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) across the nuts (6).
   (7) Safety the nuts (6) together with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
   (8) For the 2M harness:
     (a) If the bracket (3) was not removed, do as follows:
       1 Put the harness in the bracket (3).
       2 TORQUE the nuts (4) to between 3.1 and 2.7 m.daN (22.86 and 19.91 lbf.ft ) T.
       3 Paint a red line of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) across the nuts (4).
       4 Safety the nuts (4) together with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
     (b) If the bracket (3) was removed, do as follows:
       1 Apply Non Hardening Jointing Putty-High Temp. Area - Hydraulic (Material No.06LDG6) to:
  • The shank and the threads of the bolts (17)
  • The mating face of the bracket (3) where it will touch the transfer block subassembly.
       2 Put the harness in the bracket (3).
       3 Install the bracket (3) with the new AIPC 32-11-11-81-070 TAB WASHERS (18) or AIPC 32-11-85-81-070 TAB WASHERS (18) and the bolts (17).
       4 TORQUE the bolts (17) to between 1.0 and 0.8 m.daN (88.50 and 70.80 lbf.in ) T.
       5 Safety the bolts (17) with the tab washers (18).
       6 Apply Polysulfide Sealant-General Purpose Interfay Landing Gear (Material No.06AAC5) to the head of the bolts (17) and the tab washers (18).
       7 TORQUE the nut (4) to between 3.1 and 2.7 m.daN (22.86 and 19.91 lbf.ft ) T.
       8 Paint a red line of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) across the nuts (4).
       9 Safety the nuts (4) together with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
CAUTION: MAKE SURE THAT ALL ELECTRICAL CONNECTORS ARE IDENTIFIED WITH THEIR FIN NO. TO CORRECTLY CONNECT EACH PLUG TO ITS RELATED RECEPTACLE. INCORRECT CONNECTION OF THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO THE AIRCRAFT ELECTRICAL SYSTEM.
   (9) Remove the CAP-BLANKING from each electrical connector and receptacle.
   (10) For the 1M harness:
     (a) Install the electrical connector (8) on the bracket (64) as follows:
       1 Fully loosen the electrical connector (8) backshell.
       2 Pull back the conduit a small distance to show the inner cables.
       3 Carefully move the cables through the slot in the bracket (64).
       4 Attach the electrical connector (8) to the bracket (64) with the:
  • Cap screws (63)
  • Washers (65)
  • Nuts (66).
NOTE: A minimum of half a thread must show through the nuts (66) after the cap screws (63) are fully tightened.
     (b) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to the threads of the electrical connector (8) and fully tighten the backshell.
     (c) Connect the 1M axle harness electrical plug to the electrical connector (8) (Ref. AMM TASK 32-11-43-400-003).
     (d) Install the P-clips (40) to the 1M harness.
     (e) Install the P-clips (40) to the bracket (37) with the bolts (41), the washers (39) and the nuts (38).
     (f) TORQUE the nuts (38) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
     (g) Install the P-clip (56) to the 1M harness.
     (h) Install the P-clip (56) to the bracket (55) with the bolt (54), the washer (57) and the nut (58).
     (i) TORQUE the nut (58) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
     (j) Install the P-clips (15) to the 1M harness.
     (k) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to the threads of the bolts (14).
     (l) Install the P-clips (15) on the leg assembly with the bolts (14) and the washers (16).
     (m) TORQUE the bolts (14) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
     (n) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to threads of the electrical connector backshells and connect the electrical connectors that follow:
  • 21GA-A (20GA-A) (7)
  • 15GA-A (14GA-A) (13)
  • 13GG-A (12GG-A) (71)
  • 17GG-A (16GG-A) (72).
     (o) Connect the electrical connector (9) to the monitoring unit 3GW-A (2GW-A) (Ref. AMM TASK 32-47-18-400-001).
     (p) Make sure the connectors are aligned with the harness to prevent kinks in the harness.
     (q) Connect the electrical connector 4027VC (4028VC) (2) at the MLG disconnection box (Ref. AMM TASK 32-11-46-400-001).
   (11) For the 2M harness:
     (a) Install the electrical connector (10) on the bracket (59) as follows:
       1 Fully loosen the electrical connector (10) backshell.
       2 Pull back the conduit a small distance to show the inner cables.
       3 Carefully move the cables through the slot in the bracket (59).
       4 Attach the electrical connector (10) to the bracket (59) with the:
  • Cap screws (60)
  • Washers (61)
  • Nuts (62).
NOTE: A minimum of half a thread must show through the nuts (62) after the cap screws (60) are fully tightened.
     (b) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to the thread of the electrical connector (10) and fully tighten the backshell.
     (c) Connect the 2M axle harness electrical plug to the electrical connector (10) (Ref. AMM TASK 32-11-43-400-003).
     (d) Install the P-clip (56) to the 2M harness.
     (e) Install the P-clip (56) to the bracket (55) with the bolt (56), the washer (57) and the nut (58).
     (f) TORQUE the nut (58) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
     (g) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to the threads of the electrical connector backshells and connect the electrical connectors that follow:
  • 23GA-A (22GA-A) (11)
  • 17GA-A (16GA-A) (12)
  • 11GG-A (14GG-A) (70)
  • 15GG-A (18GG-A) (73).
     (h) Make sure the connectors are aligned with the harness to prevent kinks in the harness.
F MLG Harnesses 1M and 2M - Location and Detail ** ON A/C NOT FOR ALL
     (i) Connect the electrical connector 4029VC (4030VC) (1).
     (j) Install the plug (91) in the liner (90). Do not tighten the screw (92).
     (k) Align the end of the protective sleeve of the 2M harness with the inboard face of the plug (91).
     (l) Tighten the screw (92) sufficiently to safety the plug (91).
   (12) Put the guide blocks (27) in position on the applicable harness.
   (13) Install the guide blocks (27) with the bolts (26), the washers (28) and the nuts (29).
   (14) TORQUE the nuts (29) to between 0.45 and 0.4 m.daN (39.82 and 35.40 lbf.in ) T.
   (15) Put the line-support block assembly (31) in position on the applicable harness. Loosely install the washers (34), the bolts (30), the washers (32) and the nuts (33).
   (16) Make sure that the dimension X for the 1M harness is 150 mm (5.91 in.).
   (17) Make sure that the dimension Y for the 2M harness is 280 mm (11.02 in.).
   (18) TORQUE the nuts (33) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
   (19) Apply Silicone base Grease-General Purpose - - (Material No.03JBA1) to the surfaces of the line-support blocks.
   (20) Put the band-clamps (24) in position around the line-support blocks.
   (21) Visually inspect each harness for correct routing and installation.
   (22) Tighten the band-clamp nuts (25).
   (23) Safety the band-clamp nuts (25) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
   (24) Paint a red line of Silicone Adhesive Sealant-General Purpose One part legacy (Material No.06CMD9) across the electrical connectors that you have tightened.
Subtask 32-11-43-420-075-V ** ON A/C NOT FOR ALL
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.
B. Installation of the 1M and 2M Harnesses on the MLG Leg
F MLG Harnesses 1M and 2M ** ON A/C NOT FOR ALL
   (1) Put the 1M and 2M harnesses on the MLG leg in the correct routing.
     (a) Make sure that there are no kinks in the harnesses.
   (2) Put the 1M and 2M harnesses in position on the brackets (15).
   (3) TORQUE the locknuts (14) of the bracket (15) at the upper side of the MLG leg to between 3.1 and 2.7 m.daN (22.86 and 19.91 lbf.ft ) T.
   (4) TORQUE the locknuts (14) of the bracket (15) at the lower side of the MLG leg to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
   (5) Safety the locknuts (14) together with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
   (6) For the 2M harness, do the steps that follow:
     (a) If the bracket (10) was not removed:
       1 Put the 2M harness in the bracket (10).
       2 TORQUE the locknuts (11) to between 3.1 and 2.7 m.daN (22.86 and 19.91 lbf.ft ) T.
       3 Safety the locknuts (11) together with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
     (b) If the bracket (10) was removed:
       1 Put the 2M harness in the bracket (10).
       2 Install the bracket (10) with the new AIPC 32-11-11-81-070 TAB WASHERS (13) and the bolts (12).
       3 TORQUE the bolts (12) to between 1.0 and 0.8 m.daN (88.50 and 70.80 lbf.in ) T.
       4 Safety the bolts (12) with the tab washers (13).
       5 TORQUE the locknuts (11) to between 3.1 and 2.7 m.daN (22.86 and 19.91 lbf.ft ) T.
       6 Safety the locknuts (11) together with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
CAUTION: MAKE SURE THAT ALL ELECTRICAL CONNECTORS ARE IDENTIFIED WITH THEIR FIN NO. TO CORRECTLY CONNECT EACH PLUG TO ITS RELATED RECEPTACLE. INCORRECT CONNECTION OF THE ELECTRICAL CONNECTORS CAN CAUSE DAMAGE TO THE AIRCRAFT ELECTRICAL SYSTEM.
   (7) Remove the CAP-BLANKING from each electrical connector and receptacle.
   (8) For the 1M harness, do the steps that follow:
     (a) Install the electrical connector (4) on the bracket (74) as follows:
       1 Fully loosen the back-shell of the electrical connector (4).
       2 Pull back the conduit a small distance until you can see the inner cables.
       3 Carefully move the cables through the slot in the bracket (74).
       4 Attach the electrical connector (4) to the bracket (74) with the washers (75), the cap screws (77) and the nuts (76).
NOTE: A minimum of half a thread must show through the nut after the cap screws (77) are fully tightened.
     (b) Do the steps that follow:
       1 Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to the threads of the electrical connector (4) and fully tighten the back-shell.
       2 Make a mark on the back-shell of the electrical connector (4) with Top Coat Polyurethane-- Decorative External Structure (Material No.04JMD3) .
       3 Apply a layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to all the bolts and washers that you installed.
     (c) Connect the electrical plug of the 1M axle harness to the electrical connector (4) (Ref. AMM TASK 32-11-43-400-003).
F MLG Harnesses 1M and 2M ** ON A/C NOT FOR ALL
     (d) Connect the electrical connectors that follow:
  • For 21GA-A (20GA-A), the electrical connector (3)
  • For 15GA-A (14GA-A), the electrical connector (9)
  • For 13GG-A (12GG-A), the electrical connector (84)
  • For 17GG-A (16GG-A), the electrical connector (85).
     (e) Connect the electrical connector (5) to the monitoring unit 3GW-A (2GW-A) (Ref. AMM TASK 32-47-18-400-001).
     (f) Make sure that the connectors are aligned with the 1M harness to prevent kinks in the harness.
F MLG Harnesses 1M and 2M - Location and Detail ** ON A/C NOT FOR ALL
     (g) Connect the electrical connector 4027VC (4028VC) (2) at the MLG disconnection box (Ref. AMM TASK 32-11-46-400-001).
   (9) For the 2M harness, do the steps that follow:
     (a) Install the electrical connector (6) on the bracket (73) as follows:
       1 Fully loosen the back-shell of the electrical connector (6).
       2 Pull back the conduit a small distance until you can see the inner cables.
       3 Carefully move the cables through the slot in the bracket (73).
       4 Attach the electrical connector (6) to the bracket (73) with the washers (71), the cap screws (70) and the nuts (72).
NOTE: A minimum of half a thread must show through the nut after the cap screws (70) are fully tightened.
     (b) Do the steps that follow:
       1 Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to the threads of the electrical connector (6) and fully tighten the back-shell.
       2 Make a mark on the back-shell of the electrical connector (6) with Top Coat Polyurethane-- Decorative External Structure (Material No.04JMD3) .
       3 Apply a layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to all the bolts and washers that you installed.
     (c) Connect the electrical plug of the 2M harness to the electrical connector (6) (Ref. AMM TASK 32-11-43-400-003).
F MLG Harnesses 1M and 2M ** ON A/C NOT FOR ALL
     (d) Connect the electrical connectors that follow:
  • For 23GA-A (22GA-A), the electrical connector (7)
  • For 17GA-A (16GA-A), the electrical connector (8)
  • For 11GG-A (14GG-A), the electrical connector (83)
  • For 15GG-A (18GG-A), the electrical connector (86).
       1 Make sure that the connectors are aligned with the 2M harness to prevent kinks in the harness.
F MLG Harnesses 1M and 2M - Location and Detail ** ON A/C NOT FOR ALL
     (e) Connect the electrical connector 4029VC (4030VC) (1).
     (f) Install the plug (91) in the liner (90). Do not tighten the screw (92) at this step.
     (g) Align the end of the protective sleeve of the 2M harness with the inboard face of the plug (91).
     (h) Tighten the screw (92) sufficiently to safety the plug (91).
   (10) For 1M harness, do the steps that follow:
     (a) Install the P-clips (49) on the leg assembly with the bolts (50), the washers (51) and the nuts (52).
     (b) TORQUE the nuts (52) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
     (c) Install the P-clip (63) on the leg assembly with the bolt (62), the washer (64) and the nut (65).
     (d) TORQUE the nut (65) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
     (e) Install the P-clips (44) on the leg assembly with the bolts (42), the washers (43) and the nuts (45).
     (f) Install the P-clips (46) on the leg assembly with the bolts (42), the washers (47) and the nuts (48).
     (g) TORQUE the nuts (45) and (48) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
     (h) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) on the threads of the bolts (16).
     (i) Install the P-clips (18) on the leg assembly with the bolts (16), the washers (17) and the nuts (19).
     (j) TORQUE the nuts (19) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
     (k) Apply Polysulfide Sealant-General Purpose Interfay Landing Gear (Material No.06AAC5) to the bolts (16).
   (11) For 2M harness, do the steps that follow:
     (a) Install the P-clips (54) on the leg assembly with the bolts (53), the washers (55) and the nuts (56).
     (b) TORQUE the nuts (56) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
     (c) Install the P-clip (66) on the leg assembly with the bolt (69), the washer (67) and the nut (68).
     (d) TORQUE the nut (68) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
   (12) Put the 1M and 2M harnesses in the applicable clamp-blocks (36).
   (13) Put the clamps (34) in position on the clamp-blocks (36).
   (14) Install the bolts (35), the washers (33) and the nuts (32).
   (15) TORQUE the nuts (32) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
   (16) Put the 1M and 2M harnesses in the applicable channels (28).
   (17) Install the bolts (27), the washers (29) and the nuts (30).
   (18) TORQUE the nuts (30) to between 0.45 and 0.40 m.daN (39.82 and 35.40 lbf.in ) T.
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.
   (19) Safety the nuts (30) with the new AIPC 32-11-12-03-065 COTTER PINS (31).
F MLG Harnesses 1M and 2M ** ON A/C NOT FOR ALL
   (20) Make sure that dimension X for the 1M harness is 150 mm (5.91 in.).
   (21) Make sure that dimension Y for the 2M harness is 280 mm (11.02 in.).
   (22) Put the band-clamps (25) in position around the line-support blocks.
   (23) Visually examine the 1M and 2M harnesses for correct routing and installation.
   (24) Tighten the nuts (26) of the band-clamps (25).
   (25) Safety the nuts (26) of the band-clamps (25) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
   (26) Do the steps that follow:
     (a) Apply Threadlocking Adhesive-- Low strength Low viscosity - (Material No.05BAB1) to the back-shells of all the electrical connectors that you removed.
     (b) Make a mark on the back-shells of all the electrical connectors that you removed with Top Coat Polyurethane-- Decorative External Structure (Material No.04JMD3) .
     (c) Apply a layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to all the bolts and washers that you installed.
Subtask 32-11-43-410-062-A ** ON A/C NOT FOR ALL
C. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the MLG fixed fairing (Ref. AMM TASK 32-12-14-400-001).
   (3) Close the applicable access panel 574AB(674AB) (Ref. AMM TASK 57-51-37-400-008).
   (4) Remove the access platform(s).
   (5) Close the applicable MLG door (Ref. AMM TASK 32-12-00-410-001).
Subtask 32-11-43-410-062-C ** ON A/C NOT FOR ALL
C. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the MLG fixed fairing (Ref. AMM TASK 32-12-14-400-001).
   (3) Install the applicable access panel 574AB(674AB) (Ref. AMM TASK 57-51-37-400-008).
   (4) Remove the access platform(s).
   (5) Close the applicable MLG door (Ref. AMM TASK 32-12-00-410-001).
Subtask 32-11-43-410-062-D ** ON A/C NOT FOR ALL
C. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Install the overwing panel protection (Ref. AMM TASK 57-51-42-400-001).
   (3) Install the MLG fixed fairing (Ref. AMM TASK 32-12-14-400-001).
   (4) Install the applicable access panel 574AB(674AB) (Ref. AMM TASK 57-51-37-400-008).
   (5) Remove the access platform(s).
   (6) Close the applicable MLG door (Ref. AMM TASK 32-12-00-410-001).
Subtask 32-11-43-865-057-A
D. 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
** 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 32-11-43-740-052-A ** ON A/C NOT FOR ALL
E. Test
   (1) Do a BITE Test of the MLG system (Ref. AMM TASK 32-69-00-740-001).
   (2) Do an operational test of the normal braking system (Ref. AMM TASK 32-42-00-710-001).
   (3) For the 1M harness, do an operational test of the brake temperature system (Ref. AMM TASK 32-47-00-710-001).
Subtask 32-11-43-740-052-B ** ON A/C NOT FOR ALL
E. Test
   (1) Do a BITE Test of the MLG system (Ref. AMM TASK 32-69-00-740-001).
   (2) Do an operational test of the normal braking system (Ref. AMM TASK 32-42-00-710-001).
   (3) For the 1M harness, do an operational test of the brake temperature system (Ref. AMM TASK 32-47-00-710-001).
   (4) For the 2M harness, do an operational test of the brake cooling system (Ref. AMM TASK 32-48-00-710-001).
Subtask 32-11-43-720-053-A
F. Functional Test
CAUTION: DURING THE FUNCTIONAL TEST OF THE TACHOMETERS, MAKE SURE THAT THE OPERATION OF THE BRAKE PISTONS IS CORRECT AND AGREES WITH EACH STEP GIVEN IN THIS TEST: INCORRECT OPERATION OF THE BRAKE PISTONS CAN BE CAUSED BY A BAD OR A CROSSED CONNECTION OF THE TACHOMETERS DURING INSTALLATION, AND CAN CAUSE UNSATISFACTORY BRAKING AND/OR A TIRE BURST DURING AIRCRAFT OPERATION.
   (1) Do a functional test of the tachometers (Ref. AMM TASK 32-42-00-720-002).
5. Close-up
Subtask 32-11-43-942-055-A
A. Removal of Equipment
   (1) Remove the WARNING NOTICE(S).
   (2) Remove the SAFETY BARRIER(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 04:07:04 UTC
"Aviabrain" 2025