DOC AIRBUS | AMM A320FInstallation of the Bevel Gearbox
TASK 27-84-41-400-001-A
Installation of the Bevel Gearbox
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 27-84-41-860-052-A
Subtask 27-84-41-410-050-A
[Rev.10 from 2021]
2026.03.31 23:56:41 UTC
Installation of the Bevel Gearbox
WARNING:
MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
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.
FIN: 6003CM
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 | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 12.4 and 10.2 m.N (109.73 and 90.27 lbf.in )  | |
| No specific | Torque wrench: range to between 1.24 and 1.02 m.daN (109.73 and 90.27 lbf.in ) | |
| 98D27504030001 | 1 | LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT |
| 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.12ACB1) | Corrosion Preventive Compound-Heavy Duty Hard Film - |
| (Material No.12AGC2) | Corrosion Preventive Compound-- Soft Film System |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 191KB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 20-28-00-912-802-A | Electrical Bonding - General Maintenance Procedure |
| TASK 20-28-00-912-803-A | Bonding Surface Preparation |
| TASK 21-52-22-400-001-A | Installation of the Fan Plenum Chamber |
| 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 27-50-00-000-003-A | Removal of the Lock-Torque Shaft - Flaps and Slats (98D27504030001) |
| TASK 27-50-00-400-003-A | Installation of the Lock-Torque Shaft - Flaps and Slats (98D27504030001) |
| TASK 27-80-00-866-005-A | Retracting the Slats on the Ground |
| TASK 27-84-00-710-001-A | Operational Test of the Slat System |
| TASK 27-84-45-400-002-A | Installation of the Torque Shaft |
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 53-35-13-000-002-A | Removal of the Quick-Release Access Panels from the Belly Fairing Structure |
| TASK 53-35-13-400-002-A | Installation of the Quick-Release Access Panels on the Belly Fairing Structure |
19 Degree Bevel GearboxSubtask 27-84-41-860-052-A
A. Aircraft Maintenance Configuration
(1) Make sure that the slats are in the 0 degree position (Ref. AMM TASK 27-80-00-866-005).
(2) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is installed on the slat/flap control lever (Ref. AMM TASK 27-00-00-480-002).
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below access panel 191KB.
(4) Make sure that access panel 191KB is removed (Ref. AMM TASK 53-35-13-000-002).
(5) Make sure that the Green and Blue hydraulic systems are depressurized and put them in the maintenance configuration (Ref. AMM TASK 29-00-00-864-001).
(6) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the hydraulic systems.
(7) Make sure that the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT is installed to lock the left slat transmission (Ref. AMM TASK 27-50-00-400-003).
(8) Make sure that the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT is installed to lock the right slat transmission (Ref. AMM TASK 27-50-00-400-003).
Subtask 27-84-41-865-051-A (1) Make sure that the slats are in the 0 degree position (Ref. AMM TASK 27-80-00-866-005).
(2) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is installed on the slat/flap control lever (Ref. AMM TASK 27-00-00-480-002).
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below access panel 191KB.
(4) Make sure that access panel 191KB is removed (Ref. AMM TASK 53-35-13-000-002).
(5) Make sure that the Green and Blue hydraulic systems are depressurized and put them in the maintenance configuration (Ref. AMM TASK 29-00-00-864-001).
(6) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the hydraulic systems.
(7) Make sure that the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT is installed to lock the left slat transmission (Ref. AMM TASK 27-50-00-400-003).
(8) Make sure that the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT is installed to lock the right slat transmission (Ref. AMM TASK 27-50-00-400-003).
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/SLT/CTL AND MONG/SYS1 | 5CV | B06 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 | 5CV | B01 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/SLT/CTL/SYS2 | 7CV | R21 |
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 can 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 27-84-41-910-051-A A. Preparation for Installation
(1) To install the same gearbox, clean the splined surfaces of the connections with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(2) Apply Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) to the face of the bevel gearbox (1) which touches the support bracket.
Subtask 27-84-41-420-050-A ** ON A/C NOT FOR ALL (1) To install the same gearbox, clean the splined surfaces of the connections with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) .
(2) Apply Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) to the face of the bevel gearbox (1) which touches the support bracket.
B. Installation of the Bevel Gearbox
(1) Put the bevel gearbox (1) in position on the support bracket.
(2) Attach the bevel gearbox (1) to the support bracket with the bolts (16) and the washers (17).
(3) At the bonding point continue as follows (Ref. AMM TASK 20-28-00-912-802):
(a) Seal bolt (16) with Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) .
(b) Apply Coating_- Flexible Structure (Material No.04QAB2) (dyed blue) to the bonding point.
(4) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the bolt heads (16).
(5) Apply Mineral Oil base Grease-Anti-Fretting Paste - (Material No.03FDB1) to the splines of the input universal joints (4), (10).
(6) Engage the input universal joints (4), (10) of the bevel gearbox (1) in the bevel gearbox inputs.
(7) Install the torque shaft 6002CM (7) as follows:
(a) Put the torque shaft (7) in position.
(b) Make sure that the flange holes of the torque shaft (7) are in line with the flange holes of the input universal joint (4).
(c) If the flange holes of the torque shaft are not in line with the flange holes of the input universal joint (4), continue as follows:
1 Remove the input universal joint (4).
2 Turn the input universal joint (4) by the number of splines necessary to put it in line.
3 Install the input universal joint (4).
(d) Install the bolts (6) to connect the torque shaft (7) to the input universal joint (4).
(e) Install the nuts (5) on the bolts (6).
(f) Examine the assembly of the input universal joint (10) as follows:
1 Measure dimension X. Dimension X must be a minimum of 6.5 mm (0.2559 in.).
2 Make sure that you can not see the indicator groove.
(g) If you can see the indicator groove continue as follows:
1 Do a check of the related torque shafts, universal joints and gearboxes for correct installation.
(h) TORQUE the nuts (5) to between 1.24 and 1.02 m.daN (109.73 and 90.27 lbf.in ).
(i) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the bolts (6) and the nuts (5).
(8) Install the torque shaft 6004CM (13) as follows:
(a) Put the torque shaft (13) in position.
(b) Make sure that the flange holes of torque shaft (13) are in line with the flange holes of the input universal joint (10).
(c) If the flange holes of the torque shaft (13) are not in line with the flange holes of the input universal joint (10), continue as follows:
1 Remove the input universal joint (10).
2 Turn the input universal joint (10) by the number of splines necessary to put it in line.
3 Install the input universal joint (10).
(d) Install the bolts (12) to connect the torque shaft (13) to the input universal joint (10).
(e) Install the nuts (11) on the bolts (12).
(f) Examine the assembly of the input universal joint (10) as follows:
1 Measure dimension X. Dimension X must be a minimum of 6.5 mm (0.2559 in.).
2 Make sure that you can not see the indicator groove.
(g) If you can see the indicator groove continue as follows:
1 Do a check of the related torque shafts, universal joints and gearboxes for correct installation.
(h) TORQUE the nuts (11) to between 1.24 and 1.02 m.daN (109.73 and 90.27 lbf.in ).
(i) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the bolts (12) and the nuts (11).
Subtask 27-84-41-420-050-B ** ON A/C NOT FOR ALL (1) Put the bevel gearbox (1) in position on the support bracket.
(2) Attach the bevel gearbox (1) to the support bracket with the bolts (16) and the washers (17).
(3) At the bonding point continue as follows (Ref. AMM TASK 20-28-00-912-802):
(a) Seal bolt (16) with Polysulfide Sealant_General Purpose Brushable - (Material No.06AAA1) .
(b) Apply Coating_- Flexible Structure (Material No.04QAB2) (dyed blue) to the bonding point.
(4) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the bolt heads (16).
(5) Apply Mineral Oil base Grease-Anti-Fretting Paste - (Material No.03FDB1) to the splines of the input universal joints (4), (10).
(6) Engage the input universal joints (4), (10) of the bevel gearbox (1) in the bevel gearbox inputs.
(7) Install the torque shaft 6002CM (7) as follows:
(a) Put the torque shaft (7) in position.
(b) Make sure that the flange holes of the torque shaft (7) are in line with the flange holes of the input universal joint (4).
(c) If the flange holes of the torque shaft are not in line with the flange holes of the input universal joint (4), continue as follows:
1 Remove the input universal joint (4).
2 Turn the input universal joint (4) by the number of splines necessary to put it in line.
3 Install the input universal joint (4).
(d) Install the bolts (6) to connect the torque shaft (7) to the input universal joint (4).
(e) Install the nuts (5) on the bolts (6).
(f) Examine the assembly of the input universal joint (10) as follows:
1 Measure dimension X. Dimension X must be a minimum of 6.5 mm (0.2559 in.).
2 Make sure that you can not see the indicator groove.
(g) If you can see the indicator groove continue as follows:
1 Do a check of the related torque shafts, universal joints and gearboxes for correct installation.
(h) TORQUE the nuts (5) to between 1.24 and 1.02 m.daN (109.73 and 90.27 lbf.in )
. (i) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the bolts (6) and the nuts (5).
(8) Install the torque shaft 6004CM (13) as follows:
(a) Put the torque shaft (13) in position.
(b) Make sure that the flange holes of torque shaft (13) are in line with the flange holes of the input universal joint (10).
(c) If the flange holes of the torque shaft (13) are not in line with the flange holes of the input universal joint (10), continue as follows:
1 Remove the input universal joint (10).
2 Turn the input universal joint (10) by the number of splines necessary to put it in line.
3 Install the input universal joint (10).
(d) Install the bolts (12) to connect the torque shaft (13) to the input universal joint (10).
(e) Install the nuts (11) on the bolts (12).
(f) Examine the assembly of the input universal joint (10) as follows:
1 Measure dimension X. Dimension X must be a minimum of 6.5 mm (0.2559 in.).
2 Make sure that you can not see the indicator groove.
(g) If you can see the indicator groove continue as follows:
1 Do a check of the related torque shafts, universal joints and gearboxes for correct installation.
(h) TORQUE the nuts (11) to between 1.24 and 1.02 m.daN (109.73 and 90.27 lbf.in )
. (i) Apply Corrosion Preventive Compound-- Soft Film System (Material No.12AGC2) to the bolts (12) and the nuts (11).
B. Installation of the Bevel Gearbox
(1) Clean the component interfaces and the adjacent area.
(2) Do a visual inspection of the component interfaces and the adjacent area.
(3) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(4) Put the bevel gearbox (2) in position on the support bracket (7).
(5) Install the washers (9) and the bolts (8).
(6) Tighten the bolts (8).
(7) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(8) Apply Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) on the heads of the bolts (8).
(9) Apply Mineral Oil base Grease-Anti-Fretting Paste - (Material No.03FDB1) on the splines of the input universal joint (3).
(10) Install the input universal joint (3) in the bevel gearbox (2).
(11) Connect the torque shaft (4) to the input universal joint (3) as follows:
(a) Put the torque shaft (4) in position.
(b) Align the flange of the torque shaft (4) with the flange of the input universal joint (3) and attach it.
(c) If the flange of the torque shaft (4) is not aligned with the flange of the input universal joint (3), continue as follows:
1 Remove the input universal joint (3) from the bevel gearbox (2).
2 Turn the input universal joint (3) the number of splines necessary to align it.
3 Install the input universal joint (3) in the bevel gearbox (2).
(d) Install the bolts (5) and the nuts (6).
(e) Examine the assembly of the input universal joint (3) as follows:
1 Measure dimension A. Dimension A must be a minimum of 6.5 MM (0.256 IN.).
2 Make sure that you cannot see the spline engagement groove.
(f) If you can see the spline engagement groove, continue as follows:
1 Do a check of the related torque shafts, universal joints and gearboxes for correct installation.
(g) TORQUE the nuts (6) to between 12.4 and 10.2 m.N (109.73 and 90.27 lbf.in ).
(h) Apply Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) on the bolts (5) and the nuts (6).
(12) Install torque shaft (1) 6004CM (Ref. AMM TASK 27-84-45-400-002).
Subtask 27-84-41-860-051-A (1) Clean the component interfaces and the adjacent area.
(2) Do a visual inspection of the component interfaces and the adjacent area.
(3) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(4) Put the bevel gearbox (2) in position on the support bracket (7).
(5) Install the washers (9) and the bolts (8).
(6) Tighten the bolts (8).
(7) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).
(8) Apply Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) on the heads of the bolts (8).
(9) Apply Mineral Oil base Grease-Anti-Fretting Paste - (Material No.03FDB1) on the splines of the input universal joint (3).
(10) Install the input universal joint (3) in the bevel gearbox (2).
(11) Connect the torque shaft (4) to the input universal joint (3) as follows:
(a) Put the torque shaft (4) in position.
(b) Align the flange of the torque shaft (4) with the flange of the input universal joint (3) and attach it.
(c) If the flange of the torque shaft (4) is not aligned with the flange of the input universal joint (3), continue as follows:
1 Remove the input universal joint (3) from the bevel gearbox (2).
2 Turn the input universal joint (3) the number of splines necessary to align it.
3 Install the input universal joint (3) in the bevel gearbox (2).
(d) Install the bolts (5) and the nuts (6).
(e) Examine the assembly of the input universal joint (3) as follows:
1 Measure dimension A. Dimension A must be a minimum of 6.5 MM (0.256 IN.).
2 Make sure that you cannot see the spline engagement groove.
(f) If you can see the spline engagement groove, continue as follows:
1 Do a check of the related torque shafts, universal joints and gearboxes for correct installation.
(g) TORQUE the nuts (6) to between 12.4 and 10.2 m.N (109.73 and 90.27 lbf.in )
. (h) Apply Corrosion Preventive Compound-Heavy Duty Hard Film - (Material No.12ACB1) on the bolts (5) and the nuts (6).
(12) Install torque shaft (1) 6004CM (Ref. AMM TASK 27-84-45-400-002).
C. Preparation for the Test
(1) Remove the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT from the right slat transmission (Ref. AMM TASK 27-50-00-000-003).
(2) Remove the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT from the left slat transmission (Ref. AMM TASK 27-50-00-000-003).
(3) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION (Ref. AMM TASK 27-00-00-080-002) from the slat/flap control lever.
(4) Remove the WARNING NOTICE(S).
(5) Make sure that the work area is clean and clear of tools and other items.
Subtask 27-84-41-865-052-A (1) Remove the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT from the right slat transmission (Ref. AMM TASK 27-50-00-000-003).
(2) Remove the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT from the left slat transmission (Ref. AMM TASK 27-50-00-000-003).
(3) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION (Ref. AMM TASK 27-00-00-080-002) from the slat/flap control lever.
(4) Remove the WARNING NOTICE(S).
(5) Make sure that the work area is clean and clear of tools and other items.
D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 27-84-41-710-050-A 5. Close-up| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 | 5CV | B06 |
| ** ON A/C NOT FOR ALL | |||
| 49VU | FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 | 5CV | B01 |
| ** ON A/C ALL | |||
| 121VU | FLIGHT CONTROLS/SLT/CTL/SYS2 | 7CV | R21 |
Subtask 27-84-41-410-050-A
A. Close Access
(1) Install fan plenum chamber 10HM5 together with heat exchanger 10HM4 (Ref. AMM TASK 21-52-22-400-001).
(2) Install access panel 191KB (Ref. AMM TASK 53-35-13-400-002).
(3) Remove the access platform(s).
(1) Install fan plenum chamber 10HM5 together with heat exchanger 10HM4 (Ref. AMM TASK 21-52-22-400-001).
(2) Install access panel 191KB (Ref. AMM TASK 53-35-13-400-002).
(3) Remove the access platform(s).