DOC AIRBUS | AMM A320FInstallation of the Right Angle Gearbox
TASK 27-54-41-400-001-A
Installation of the Right Angle Gearbox
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 27-54-41-860-053-A
Subtask 27-54-41-410-050-A
[Rev.10 from 2021]
2026.03.31 23:53:14 UTC
Installation 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.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
NOTE: The installation 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.
1. Reason for the JobSelf 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 | Torque wrench: range to between 0.96 and 0.78 m.daN (84.96 and 69.03 lbf.in )  | |
| No specific | Torque wrench: range to between 1.24 and 1.02 m.daN (109.73 and 90.27 lbf.in ) | |
| 98D27803000000 | 1 | LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.03FDB1) | Mineral Oil base Grease-Anti-Fretting Paste - |
| (Material No.04QAB2) | Coating_- Flexible Structure |
| (Material No.06AAA1) | Polysulfide Sealant_General Purpose Brushable - |
| (Material No.06AEB2) | Polysulfide Sealant-Low Adhesion Fillet Structure |
| (Material No.08BBB1) | Non Aqueous Cleaner-- Petroleum Based - |
| (Material No.12AGC2) | Corrosion Preventive Compound-- Soft Film System |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 27-00-00-080-002-A | Removal of the Flap/Slat Control-Lever Locking Tool (98D27803000000) |
| 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 27-54-00-710-001-A | Operational Test of the Flap System |
| 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 |
| TASK 32-12-00-410-001-A | Close the Main Gear Doors after Access |
Right Angle GearboxSubtask 27-54-41-860-053-A
A. Aircraft Maintenance Configuration
(1) Make sure that the the flaps are in the the 0 degree position (Ref. AMM TASK 27-50-00-866-009).
(2) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION (Ref. AMM TASK 27-00-00-480-002) is installed on the slat/flap control lever.
(3) Make sure that the Green and Yellow hydraulic systems are depressurized and put them in the maintenance configuration (Ref. AMM TASK 29-00-00-864-001)
(4) Make sure that the check pin is installed 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.
(5) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the hydraulic systems.
(6) Make sure that the main doors of the main gear are open (Ref. AMM TASK 32-12-00-010-001).
(7) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position at the opening of the main gear main door.
Subtask 27-54-41-865-051-A (1) Make sure that the the flaps are in the the 0 degree position (Ref. AMM TASK 27-50-00-866-009).
(2) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION (Ref. AMM TASK 27-00-00-480-002) is installed on the slat/flap control lever.
(3) Make sure that the Green and Yellow hydraulic systems are depressurized and put them in the maintenance configuration (Ref. AMM TASK 29-00-00-864-001)
(4) Make sure that the check pin is installed 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.
(5) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the hydraulic systems.
(6) Make sure that the main doors of the main gear are open (Ref. AMM TASK 32-12-00-010-001).
(7) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position at the opening of the main gear main door.
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B02 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2 | 8CV | Q21 |
NOTE: The gearbox is a unit filled with grease and is not a hermetically sealed unit. It is normal for this grease to have some oil separation. The external surface of the gearbox may be moist with this separated oil as it is not a sealed unit. However, any separated oil in the unit that touches the grease will be changed back during operation. The oil separation will decrease during in-service operation until the lubricant is in a condition that is stable. This is normal and will not cause damage to the unit.
Subtask 27-54-41-910-052-A A. Preparation for the Installation
(1) Apply Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) to the face of the right angle gearbox 6203CM (6253CM) (1) which touches the support bracket.
(2) Make sure that the splined surfaces of the input universal joint (18) and the shaft (5) are cleaned with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(3) Apply Mineral Oil base Grease-Anti-Fretting Paste - (Material No.03FDB1) to the splines of the input universal joints (5) and (18).
(4) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the heads of the bolts (16).
Subtask 27-54-41-420-050-A (1) Apply Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) to the face of the right angle gearbox 6203CM (6253CM) (1) which touches the support bracket.
(2) Make sure that the splined surfaces of the input universal joint (18) and the shaft (5) are cleaned with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(3) Apply Mineral Oil base Grease-Anti-Fretting Paste - (Material No.03FDB1) to the splines of the input universal joints (5) and (18).
(4) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the heads of the bolts (16).
B. Installation of the Right Angle Gearbox 6203CM (6253CM)
(1) Install the right angle gearbox (1) as follows:
(2) Put the right angle gearbox (1) in position on the support bracket and attach it with the bolts (16) and the washers (17).
(3) At the bonding point, seal the bolt (16) with Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) and apply Coating_- Flexible Structure (Material No.04QAB2) (dyed blue) to the bonding area (Ref. AMM TASK 20-28-00-912-802).
(4) TORQUE the bolts (16 ) to between 0.96 and 0.78 m.daN (84.96 and 69.03 lbf.in ).
(5) Install the input universal joint (18) as follows:
(a) Engage the input universal joint (18) of the right angle gearbox (1) in the input of the right angle gearbox.
(b) Install the pin (10) and safety it with the spring (3).
(6) Install the input universal joint (5) as follows:
(a) Engage the input universal joint (5) of the right angle gearbox (1) in the input of the right angle gearbox.
(b) Install the pin (10) and safety it with the spring (3).
(7) Install the torque shaft 6204CM (6254CM) (11) as follows:
(a) Put the torque shaft (11) in position.
(b) Make sure that the flange holes of the torque shaft (11) are in line with the flange holes of the input universal joint (18).
(c) If the flange holes are not in line turn the input universal joint (18) as necessary to put it in line.
(d) Install the shim (15).
(e) Install the bolts (14) and the nuts (7) to attach the torque shaft (11) to the input universal joint (18).
(8) Measure dimension X. If dimension X is less than 6.5 mm (0.2559 in.), continue as follows:
(a) Remove the nuts (7) and the bolts (14).
(b) Remove the shim (15).
(c) Install the bolts (14) to connect the torque shaft (11) to the input universal joint (18).
(d) Install the nuts (7) on the bolts (14).
(9) Make sure that you can not see the indicator groove. If you can see the indicator groove , continue as follows:
(a) Remove the nuts (7) and the bolts (14).
(b) Install the shim (15) between the torque shaft (11) and the input universal joint (18).
(c) Install the bolts (14) to connect the torque shaft (11) to the input universal joint (18).
(d) Install the nuts (7) on the bolts (14).
(e) TORQUE the nuts (7) to between 1.24 and 1.02 m.daN (109.73 and 90.27 lbf.in ).
(f) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the bolts (6) or (14) as assembled and the nuts (7).
(10) Install the torque shaft 6202CM (6252CM) (9) as follows:
(a) Put the torque shaft (9) in position.
(b) Make sure that the flange holes of the torque shaft (9) are in line with the flange holes of the input universal joint (5).
(11) If the flange holes of the torque shaft (9) are not in line with the flange holes of the input universal joint (5), continue as follows:
(a) Remove the torque shaft (9) complete with the attached input universal joint from the input of the Power Control Unit (PCU).
(b) Turn the torque shaft (9) as necessary to put it in line.
(c) Install the torque shaft (9) complete with the attached input universal joint in the input of the PCU.
(12) Install the bolts (6) and the nuts (7) to attach the torque shaft (9) to the input universal joint (5).
(13) Examine the assembly of the input universal joint (5) as follows:
(a) Measure dimension X. Dimension X must be a minimum of 6.5 mm (0.2559 in.).
(b) Make sure that you can not see the indicator groove.
(14) If you can see the indicator groove continue as follows:
(a) Measure all the related torque shafts, universal joints and gearboxes and refer to LIEBHERR technical data.
(15) TORQUE the nuts (7) to between 1.24 and 1.02 m.daN (109.73 and 90.27 lbf.in ).
(16) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the bolts (6) and the nuts (7).
Subtask 27-54-41-860-052-A (1) Install the right angle gearbox (1) as follows:
(2) Put the right angle gearbox (1) in position on the support bracket and attach it with the bolts (16) and the washers (17).
(3) At the bonding point, seal the bolt (16) with Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) and apply Coating_- Flexible Structure (Material No.04QAB2) (dyed blue) to the bonding area (Ref. AMM TASK 20-28-00-912-802).
(4) TORQUE the bolts (16 ) to between 0.96 and 0.78 m.daN (84.96 and 69.03 lbf.in )
. (5) Install the input universal joint (18) as follows:
(a) Engage the input universal joint (18) of the right angle gearbox (1) in the input of the right angle gearbox.
(b) Install the pin (10) and safety it with the spring (3).
(6) Install the input universal joint (5) as follows:
(a) Engage the input universal joint (5) of the right angle gearbox (1) in the input of the right angle gearbox.
(b) Install the pin (10) and safety it with the spring (3).
(7) Install the torque shaft 6204CM (6254CM) (11) as follows:
(a) Put the torque shaft (11) in position.
(b) Make sure that the flange holes of the torque shaft (11) are in line with the flange holes of the input universal joint (18).
(c) If the flange holes are not in line turn the input universal joint (18) as necessary to put it in line.
(d) Install the shim (15).
(e) Install the bolts (14) and the nuts (7) to attach the torque shaft (11) to the input universal joint (18).
(8) Measure dimension X. If dimension X is less than 6.5 mm (0.2559 in.), continue as follows:
(a) Remove the nuts (7) and the bolts (14).
(b) Remove the shim (15).
(c) Install the bolts (14) to connect the torque shaft (11) to the input universal joint (18).
(d) Install the nuts (7) on the bolts (14).
(9) Make sure that you can not see the indicator groove. If you can see the indicator groove , continue as follows:
(a) Remove the nuts (7) and the bolts (14).
(b) Install the shim (15) between the torque shaft (11) and the input universal joint (18).
(c) Install the bolts (14) to connect the torque shaft (11) to the input universal joint (18).
(d) Install the nuts (7) on the bolts (14).
(e) TORQUE the nuts (7) to between 1.24 and 1.02 m.daN (109.73 and 90.27 lbf.in )
. (f) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the bolts (6) or (14) as assembled and the nuts (7).
(10) Install the torque shaft 6202CM (6252CM) (9) as follows:
(a) Put the torque shaft (9) in position.
(b) Make sure that the flange holes of the torque shaft (9) are in line with the flange holes of the input universal joint (5).
(11) If the flange holes of the torque shaft (9) are not in line with the flange holes of the input universal joint (5), continue as follows:
(a) Remove the torque shaft (9) complete with the attached input universal joint from the input of the Power Control Unit (PCU).
(b) Turn the torque shaft (9) as necessary to put it in line.
(c) Install the torque shaft (9) complete with the attached input universal joint in the input of the PCU.
(12) Install the bolts (6) and the nuts (7) to attach the torque shaft (9) to the input universal joint (5).
(13) Examine the assembly of the input universal joint (5) as follows:
(a) Measure dimension X. Dimension X must be a minimum of 6.5 mm (0.2559 in.).
(b) Make sure that you can not see the indicator groove.
(14) If you can see the indicator groove continue as follows:
(a) Measure all the related torque shafts, universal joints and gearboxes and refer to LIEBHERR technical data.
(15) TORQUE the nuts (7) to between 1.24 and 1.02 m.daN (109.73 and 90.27 lbf.in )
. (16) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the bolts (6) and the nuts (7).
C. Preparation for the Test
(1) Remove the check pin from the flap transmission (Ref. AMM TASK 27-50-00-480-802).
(a) FOR [6203CM] (FLAP RIGHT ANGLE GEARBOX)
from the left flap transmission.
(b) FOR [6253CM] (FLAP RIGHT ANGLE GEARBOX)
from the right flap transmission.
(2) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION (Ref. AMM TASK 27-00-00-080-002) from the slat/flap control lever.
(3) Remove the WARNING NOTICE(S).
Subtask 27-54-41-865-052-A (1) Remove the check pin from the flap transmission (Ref. AMM TASK 27-50-00-480-802).
(a) FOR [6203CM] (FLAP RIGHT ANGLE GEARBOX)
from the left flap transmission.
(b) FOR [6253CM] (FLAP RIGHT ANGLE GEARBOX)
from the right flap transmission.
(2) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION (Ref. AMM TASK 27-00-00-080-002) from the slat/flap control lever.
(3) Remove the WARNING NOTICE(S).
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 27-54-41-710-050-A 5. Close-up| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B07 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1 | 6CV | B02 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2 | 8CV | Q21 |
Subtask 27-54-41-410-050-A
A. Close Access
(1) Remove the access platform(s).
(2) Close the main doors of the main gear (Ref. AMM TASK 32-12-00-410-001).
(1) Remove the access platform(s).
(2) Close the main doors of the main gear (Ref. AMM TASK 32-12-00-410-001).