W DOC AIRBUS | AMM A320F

Inspection of the MLG Axles after a Brake Overheat

TASK 32-11-00-200-007-A
Inspection of the MLG Axles after a Brake Overheat

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 TRAVEL RANGES OF THE LANDING GEAR ARE CLEAR.
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
AR
PAPER - ABRASIVE (GRADE 320)
No specific
AR
SAFETY BARRIER(S)
No specific
AR
TESTER - HARNESS
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
731
L.H MAIN GEAR
741
R.H MAIN GEAR
 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 32-00-00-481-001-A
Installation of the Safety Devices on the Landing Gears
TASK 32-41-11-000-006-A
Removal of the MLG Wheel
TASK 32-41-11-400-006-A
Installation of the MLG Wheel
TASK 32-42-27-000-001-A
Removal of the Brake
TASK 32-42-27-400-001-A
Installation of the Brake
TASK 32-11-13-000-004-A
Removal of the Sliding Tube Sub-Assembly of the MLG Shock Absorber (for corrective action)
TASK 32-11-13-400-004-A
Installation of the Sliding Tube Sub-Assembly of the MLG Shock Absorber (for corrective action)
CMM 321222
 (for corrective action)
CMM 321225
 (for corrective action)
F Main Landing Gear Axle (Twin)
3. Job Set-up
Subtask 32-11-00-941-077-A
A. Safety Precautions
   (1) Make sure that the ground safety locks are on the landing gear (Ref. AMM TASK 32-00-00-481-001).
   (2) 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.
   (3) Put a WARNING NOTICE(S) in position to tell persons not to operate the landing gear doors.
   (4) Put the SAFETY BARRIER(S) in position.
   (5) Make sure that the Green and the Yellow hydraulic systems are depressurized (Ref. AMM TASK 29-00-00-864-001).
Subtask 32-11-00-010-067-A
B. Get Access
   (1) Remove the MLG wheels (Ref. AMM TASK 32-41-11-000-006).
   (2) Remove the brakes and the axle protection sleeves (Ref. AMM TASK 32-42-27-000-001).
4. Procedure
Subtask 32-11-00-210-073-A
A. Visual Inspection
   (1) Make sure the paint is in good condition on the brake flange and between the axle sleeve lands.
   (2) Make sure the paint is in good condition on the surface of the axle bore.
   (3) If the paint is golden brown or blistered, do the hardness check in Para. 4.B.
Subtask 32-11-00-220-066-C ** ON A/C NOT FOR ALL
B. Hardness Check
   (1) Prepare the top of the brake flange between two adjacent bolt holes to do the hardness check that follows:
     (a) Use PAPER - ABRASIVE (GRADE 320) to remove material in an area that is not more than 10 mm (0.39 in.) x 10 mm (0.39 in.).
     (b) Do not remove more metal than necessary, but make sure the prepared area is cleaned to the shot peened surface.
   (2) Use the TESTER - HARNESS to do a hardness check. (The minimum hardness must be 571 HV):
  • If the hardness is 571 HV or more, it is satisfactory. Repair the area prepared for the hardness check and the discolored paint CMM 321222, Para. Repair
  • If the hardness is less than 571 HV, it is unsatisfactory and you must replace the MLG sliding tube (Ref. AMM TASK 32-11-13-000-004) and (Ref. AMM TASK 32-11-13-400-004).
Subtask 32-11-00-220-066-J ** ON A/C NOT FOR ALL
B. Hardness Check
   (1) Prepare the top of the brake flange between two adjacent bolt holes to do the hardness check that follows:
     (a) Use PAPER - ABRASIVE (GRADE 320) to remove material in an area that is not more than 10 mm (0.39 in.) x 10 mm (0.39 in.).
     (b) Do not remove more metal than necessary, but make sure the prepared area is cleaned to the shot peened surface.
   (2) Use the TESTER - HARNESS to do a hardness check. (The minimum hardness must be 571 HV):
  • If the hardness is 571 HV or more, it is satisfactory. Repair the area prepared for the hardness check and the discolored paint CMM 321225, Para. Repair
  • If the hardness is less than 571 HV, it is unsatisfactory and you must replace the MLG sliding tube (Ref. AMM TASK 32-11-13-000-004) and (Ref. AMM TASK 32-11-13-400-004).
5. Close-up
Subtask 32-11-00-410-065-A
A. Close Access
   (1) Install the MLG axle sleeves and the brakes (Ref. AMM TASK 32-42-27-400-001).
   (2) Install the MLG wheels (Ref. AMM TASK 32-41-11-400-006).
Subtask 32-11-00-942-078-A
B. Removal of Equipment
   (1) Remove the WARNING NOTICE(S).
   (2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
[Rev.10 from 2021] 2026.04.01 00:39:35 UTC
"Aviabrain" 2025