W DOC AIRBUS | AMM A320F

Removal of the Right Angle Gearbox

TASK 27-54-41-000-001-A
Removal of the Right Angle Gearbox

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
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.
NOTE: The removal procedure for the right angle gearbox 6203CM is specified. The procedure for the right angle gearbox 6253CM is almost the same. Any differences in the procedures are specified where applicable.
FIN: 6203CM
FIN: 6253CM
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 4M (13 FT)-ADJUSTABLE
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
1
WARNING NOTICE(S)
98D27803000000
1
LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION
 B. Referenced Information
REFERENCE
DESIGNATION
TASK 27-00-00-480-002-A
Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 27-50-00-480-802-A
Installation/Removal of the Check Pin at Track 1
TASK 27-50-00-866-009-A
Retraction of the Flaps on the Ground
TASK 27-50-00-866-009-A-01
Retraction of the Flaps/Slats on the Ground
TASK 29-00-00-864-001-A
Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 32-12-00-010-001-A
Open the Main Gear Doors for Access
F Right Angle Gearbox
FOR [6253CM] (FLAP RIGHT ANGLE GEARBOX)
TASK 27-54-00-820-001-A
Adjustment of the Flap Drive System
3. Job Set-up
Subtask 27-54-41-860-051-A
A. Retraction of the Flaps
   (1) Retract the flaps to the 0 degree position (Ref. AMM TASK 27-50-00-866-009).
   (2) Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION (Ref. AMM TASK 27-00-00-480-002) on the slat/flap control lever.
Subtask 27-54-41-865-050-A
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/FLP/CTL AND MONG/SYS16CVB07
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/FLP/CTL AND MONG/SYS16CVB02
** ON A/C ALL
121VUFLIGHT CONTROLS/FLP/CTL AND/MONG/SYS28CVQ21
Subtask 27-54-41-010-050-A
C. Get Access
   (1) Open the main doors of the main gear (Ref. AMM TASK 32-12-00-010-001).
   (2) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position at the opening of the main gear main door.
Subtask 27-54-41-860-050-B
D. Aircraft Maintenance Configuration
   (1) Depressurize the Green and Yellow hydraulic systems.
(Ref. AMM TASK 29-00-00-864-001)
   (2) Install the check pin at track 1 to lock the flap transmission (Ref. AMM TASK 27-50-00-480-802).
     (a) FOR [6203CM] (FLAP RIGHT ANGLE GEARBOX)
lock the left flap transmission.
     (b) FOR [6253CM] (FLAP RIGHT ANGLE GEARBOX)
lock the right flap transmission.
       1 If you cannot install the check pin easily, do the adjustment of the L/H (R/H) flap drive system (Ref. AMM TASK 27-54-00-820-001).
   (3) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic systems.
4. Procedure
Subtask 27-54-41-020-050-A
A. Removal of the Right Angle Gearbox 6204CM (6254CM)
   (1) Disconnect the torque shaft 6202CM (6252CM) (9) as follows:
     (a) Move the spring (3) and remove the pin (10).
     (b) Remove the nuts (7) and the bolts (6) which connect the torque shaft (9) to the input universal joint (5) of the right angle gearbox (1).
     (c) Disconnect the torque shaft (9) from the input universal joint (5).
     (d) Remove the input universal joint (5) from the right angle gearbox (1).
   (2) Disconnect the torque shaft 6204CM (6254CM) (11) as follows:
     (a) Move the spring (3) and remove the pin (10).
     (b) Remove the nuts (7) and the bolts (14) which connect the torque shaft (11) to the input universal joint (18) of the right angle gearbox (1).
     (c) Remove the shim (15).
     (d) Disconnect the torque shaft (11) from the input universal joint (18).
     (e) Remove the input universal joint (18) from the right angle gearbox (1).
   (3) Remove the right angle gearbox 6203CM (6253CM) (1) as follows:
     (a) Hold the right angle gearbox (1) so that it can not fall.
     (b) Remove the bolts (16) and the washers (17) which attach the right angle gearbox (1) to the support bracket.
     (c) Remove the right angle gearbox (1).
[Rev.10 from 2021] 2026.04.01 07:03:46 UTC
"Aviabrain" 2025