DOC AIRBUS | AMM A320FInstallation of the Latching Unit
TASK 52-32-21-400-013-A
Installation of the Latching Unit
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 52-32-21-860-064-A
Subtask 52-32-21-910-061-A
Subtask 52-32-21-865-085-A
[Rev.10 from 2021]
2026.04.01 12:46:08 UTC
Installation of the Latching Unit
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 |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.03HBD9) | Synthetic Ester base Grease-General Purpose Low Temp - |
| (Material No.12ABB1) | Corrosion Preventive Compound-Water Displacing Hard Film - |
| (Material No.12ABC1) | Corrosion Preventive Compound_Water Displacing Soft Film - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 826AR |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 206 | COTTER PIN | AIPC 52-32-21-37-030 |
| 203 | COTTER PIN | AIPC 52-32-21-37-150 |
| 172 | COTTER PIN | AIPC 52-32-21-37-240 |
| 206 | COTTER PIN | AIPC 52-32-21-38-030 |
| 203 | COTTER PIN | AIPC 52-32-21-38-150 |
| 172 | COTTER PIN | AIPC 52-32-21-38-240 |
| 221 | COTTER PIN | AIPC 52-32-21-43-040 |
| 223 | COTTER PIN | AIPC 52-32-21-43-040 |
| 225 | COTTER PIN | AIPC 52-32-21-43-040 |
| 221 | COTTER PIN | AIPC 52-32-21-44-040 |
| 223 | COTTER PIN | AIPC 52-32-21-44-040 |
| 225 | COTTER PIN | AIPC 52-32-21-44-040 |
| 206 | COTTER PIN | AIPC 52-32-84-44-030 |
| 203 | COTTER PIN | AIPC 52-32-84-44-160 |
| 172 | COTTER PIN | AIPC 52-32-84-44-230 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-22-52-640-002-A | Lubrication of Cargo Door |
| TASK 52-30-00-860-001-A | Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| TASK 52-30-00-860-002-A | Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump |
| TASK 52-32-00-720-001-A | Functional Check of Aft Cargo-Compartment Door, Comprising Functional Checks of Locking Mechanism, Interlock Mechanism, Drift Pin Mechanism, Safety Mechanism |
| TASK 52-32-11-820-002-A | Adjustment of the Door Mechanism |
Latching UnitSubtask 52-32-21-860-064-A
A. Aircraft Maintenance Configuration
(1) Make sure that the AFT cargo-compartment door (referred to as cargo door) is opened and safetied with the actuator safety locks (Ref. AMM TASK 52-30-00-860-001).
(2) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the opened cargo door.
(3) Make sure that the access panel 826AR is removed from the cargo door.
Subtask 52-32-21-865-084-A (1) Make sure that the AFT cargo-compartment door (referred to as cargo door) is opened and safetied with the actuator safety locks (Ref. AMM TASK 52-30-00-860-001).
(2) Make sure that the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the opened cargo door.
(3) Make sure that the access panel 826AR is removed from the cargo 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 | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N30 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N31 |
| ** ON A/C ALL | |||
| 122VU | DOORS/CARGO | 1MJ | T12 |
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
Subtask 52-32-21-910-061-A
A. Preparation for Installation
(1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Apply a layer of Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to:
Subtask 52-32-21-420-072-A ** ON A/C NOT FOR ALL (1) Make sure that the parts retained from the removed component are clean and in the correct condition.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Apply a layer of Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to:
- the inner and outer sliding surfaces of the sleeves (211),(214),(229),(240),
- the sliding surfaces of the bushes (181), (209), (216), (228), (230), (235), (236), (241) and (239),
- the shaft of all other bolts.
B. Assembly of the Latching Unit
(1) Assemble the bellcrank (215) on the bellcrank lever (234) as follows:
(a) Install the sleeves (240) in the bellcrank (215).
(b) Install the bushes (239) and (241) in the upper fork end of the bellcrank lever (234).
(c) Put the bellcrank (215) in position in the upper fork end of the bellcrank lever(234).
(d) Install the bolt (232), the washers (233) and the nut (224).
(e) Tighten the nut (224) and safety it with the new AIPC 52-32-21-43-040 COTTER PIN (223).
(2) Connect the bellcrank (215) to the link rod (181) as follows:
(a) Put the lower eye-end of the link rod (181) on the fork-end of the bellcrank (215).
(b) Install the bolt (237), the washers (238), the bushes (239) and (241) and the nut (222) on the bellcrank lever (215).
(c) Tighten the nut (222) and safety it with the new AIPC 52-32-21-43-040 COTTER PIN (221).
(3) Assemble the latch hook (210) on the bellcrank lever (234) as follows:
(a) Install the sleeve (229) in the latch hook (210).
(b) Install the bushes (228) and (230) in the lower fork-end of the bellcrank lever (234).
(c) Put the latch hook (210) in the lower fork end of the bellcrank lever (234) and install the bolt (231), the washers (227) and the nut (226).
(d) Tighten the nut (226) and safety it with the new AIPC 52-32-21-43-040 COTTER PIN (225).
Subtask 52-32-21-420-073-A ** ON A/C NOT FOR ALL (1) Assemble the bellcrank (215) on the bellcrank lever (234) as follows:
(a) Install the sleeves (240) in the bellcrank (215).
(b) Install the bushes (239) and (241) in the upper fork end of the bellcrank lever (234).
(c) Put the bellcrank (215) in position in the upper fork end of the bellcrank lever(234).
(d) Install the bolt (232), the washers (233) and the nut (224).
(e) Tighten the nut (224) and safety it with the new AIPC 52-32-21-43-040 COTTER PIN (223).
(2) Connect the bellcrank (215) to the link rod (181) as follows:
(a) Put the lower eye-end of the link rod (181) on the fork-end of the bellcrank (215).
(b) Install the bolt (237), the washers (238), the bushes (239) and (241) and the nut (222) on the bellcrank lever (215).
(c) Tighten the nut (222) and safety it with the new AIPC 52-32-21-43-040 COTTER PIN (221).
(3) Assemble the latch hook (210) on the bellcrank lever (234) as follows:
(a) Install the sleeve (229) in the latch hook (210).
(b) Install the bushes (228) and (230) in the lower fork-end of the bellcrank lever (234).
(c) Put the latch hook (210) in the lower fork end of the bellcrank lever (234) and install the bolt (231), the washers (227) and the nut (226).
(d) Tighten the nut (226) and safety it with the new AIPC 52-32-21-43-040 COTTER PIN (225).
C. Installation of the Latching Unit
(1) Connect the link rod (181) to the link lever (175) as follows:
(a) Put the upper eye-end of the link rod (181) on the fork-end of the shaft lever (175).
(b) Install the bolt (178), the washers (179), the bushes (180) and (182) and the (173).
(c) Tighten the nut (173) and safety it with the new AIPC 52-32-21-37-240 COTTER PIN (172) or AIPC 52-32-84-44-230 COTTER PIN (172).
(2) Attach the bellcrank lever (215) to the cargo door frame as follows:
(a) Install the bush (216) in the cargo door frame.
(b) Assemble the sleeve (214) into the bellcrank lever (215).
(c) Move the bellcrank lever (215) inboard until you can install the bolt (213).
(d) Install the bolt (213), the washers (205) and the nut (204) on the cargo door frame.
(e) Tighten the nut (204) and safety it with the new AIPC 52-32-21-37-150 COTTER PIN (203) or AIPC 52-32-84-44-160 COTTER PIN (203).
(3) Attach the latch hook (210) to the cargo door frame as follows:
(a) Install the bushes (209) in the cargo door frame.
(b) Assemble the sleeve (211) into the latch hook (210).
(c) Move the latch hook (210) inboard until you can install the bolt (212).
(d) Install the bolt (212), the washers (208) and the nut (207).
(e) Tighten the nut (207) and safety it with the new cotter pin (206).
(f) Tighten the nut (207) and safety it with the new AIPC 52-32-21-37-030 COTTER PIN (206) or AIPC 52-32-84-44-030 COTTER PIN (206).
(4) Install the travel limit bolt (217), the washers (201) and the nut (202) on the cargo door frame.
Subtask 52-32-21-420-072-C ** ON A/C NOT FOR ALL (1) Connect the link rod (181) to the link lever (175) as follows:
(a) Put the upper eye-end of the link rod (181) on the fork-end of the shaft lever (175).
(b) Install the bolt (178), the washers (179), the bushes (180) and (182) and the (173).
(c) Tighten the nut (173) and safety it with the new AIPC 52-32-21-37-240 COTTER PIN (172) or AIPC 52-32-84-44-230 COTTER PIN (172).
(2) Attach the bellcrank lever (215) to the cargo door frame as follows:
(a) Install the bush (216) in the cargo door frame.
(b) Assemble the sleeve (214) into the bellcrank lever (215).
(c) Move the bellcrank lever (215) inboard until you can install the bolt (213).
(d) Install the bolt (213), the washers (205) and the nut (204) on the cargo door frame.
(e) Tighten the nut (204) and safety it with the new AIPC 52-32-21-37-150 COTTER PIN (203) or AIPC 52-32-84-44-160 COTTER PIN (203).
(3) Attach the latch hook (210) to the cargo door frame as follows:
(a) Install the bushes (209) in the cargo door frame.
(b) Assemble the sleeve (211) into the latch hook (210).
(c) Move the latch hook (210) inboard until you can install the bolt (212).
(d) Install the bolt (212), the washers (208) and the nut (207).
(e) Tighten the nut (207) and safety it with the new cotter pin (206).
(f) Tighten the nut (207) and safety it with the new AIPC 52-32-21-37-030 COTTER PIN (206) or AIPC 52-32-84-44-030 COTTER PIN (206).
(4) Install the travel limit bolt (217), the washers (201) and the nut (202) on the cargo door frame.
D. Assembly of the Latching Unit
(1) Assemble the bellcrank (215) on the bellcrank lever (234) as follows:
(a) Install the sleeves (240) in the bellcrank (215).
(b) Install the bushes (239) and (241) in the upper fork end of the bellcrank lever (234).
(c) Put the bellcrank (215) in position in the upper fork end of the bellcrank lever(234).
(d) Install the bolt (232), the washers (233) and the nut (224).
(e) Tighten the nut (224) and safety it with the new AIPC 52-32-21-44-040 COTTER PIN (223).
(2) Connect the bellcrank (215) to the link rod (181) as follows:
(a) Put the lower eye-end of the link rod (181) on the fork-end of the bellcrank (215).
(b) Install the bolt (237), the washers (238), the bushes (239) and (241) and the nut (222) on the bellcrank lever (215).
(c) Tighten the nut (222) and safety it with the new AIPC 52-32-21-44-040 COTTER PIN (221).
(3) Assemble the latch hook (210) on the bellcrank lever (234) as follows:
(a) Install the sleeve (229) in the latch hook (210).
(b) Install the bushes (228) and (230) in the lower fork-end of the bellcrank lever (234).
(c) Put the latch hook (210) in the lower fork end of the bellcrank lever (234) and install the bolt (231), the washers (227) and the nut (226).
(d) Tighten the nut (226) and safety it with the new AIPC 52-32-21-44-040 COTTER PIN (225).
Subtask 52-32-21-420-073-C ** ON A/C NOT FOR ALL (1) Assemble the bellcrank (215) on the bellcrank lever (234) as follows:
(a) Install the sleeves (240) in the bellcrank (215).
(b) Install the bushes (239) and (241) in the upper fork end of the bellcrank lever (234).
(c) Put the bellcrank (215) in position in the upper fork end of the bellcrank lever(234).
(d) Install the bolt (232), the washers (233) and the nut (224).
(e) Tighten the nut (224) and safety it with the new AIPC 52-32-21-44-040 COTTER PIN (223).
(2) Connect the bellcrank (215) to the link rod (181) as follows:
(a) Put the lower eye-end of the link rod (181) on the fork-end of the bellcrank (215).
(b) Install the bolt (237), the washers (238), the bushes (239) and (241) and the nut (222) on the bellcrank lever (215).
(c) Tighten the nut (222) and safety it with the new AIPC 52-32-21-44-040 COTTER PIN (221).
(3) Assemble the latch hook (210) on the bellcrank lever (234) as follows:
(a) Install the sleeve (229) in the latch hook (210).
(b) Install the bushes (228) and (230) in the lower fork-end of the bellcrank lever (234).
(c) Put the latch hook (210) in the lower fork end of the bellcrank lever (234) and install the bolt (231), the washers (227) and the nut (226).
(d) Tighten the nut (226) and safety it with the new AIPC 52-32-21-44-040 COTTER PIN (225).
E. Installation of the Latching Unit
(1) Connect the link rod (181) to the link lever (175) as follows:
(a) Put the upper eye-end of the link rod (181) on the fork-end of the shaft lever (175).
(b) Install the bolt (178), the washers (179), the bushes (180) and (182) and the (173).
(c) Tighten the nut (173) and safety it with the new AIPC 52-32-21-38-240 COTTER PIN (172).
(2) Attach the bellcrank lever (215) to the cargo door frame as follows:
(a) Install the bush (216) in the cargo door frame.
(b) Assemble the sleeve (214) into the bellcrank lever (215).
(c) Move the bellcrank lever (215) inboard until you can install the bolt (213).
(d) Install the bolt (213), the washers (205) and the nut (204) on the cargo door frame.
(e) Tighten the nut (204) and safety it with the new AIPC 52-32-21-38-150 COTTER PIN (203).
(3) Attach the latch hook (210) to the cargo door frame as follows:
(a) Install the bushes (209) in the cargo door frame.
(b) Assemble the sleeve (211) into the latch hook (210).
(c) Move the latch hook (210) inboard until you can install the bolt (212).
(d) Install the bolt (212), the washers (208) and the nut (207).
(e) Tighten the nut (207) and safety it with the new cotter pin (206).
(f) Tighten the nut (207) and safety it with the new AIPC 52-32-21-38-030 COTTER PIN (206).
(4) Install the travel limit bolt (217), the washers (201) and the nut (202) on the cargo door frame.
Subtask 52-32-21-820-062-A (1) Connect the link rod (181) to the link lever (175) as follows:
(a) Put the upper eye-end of the link rod (181) on the fork-end of the shaft lever (175).
(b) Install the bolt (178), the washers (179), the bushes (180) and (182) and the (173).
(c) Tighten the nut (173) and safety it with the new AIPC 52-32-21-38-240 COTTER PIN (172).
(2) Attach the bellcrank lever (215) to the cargo door frame as follows:
(a) Install the bush (216) in the cargo door frame.
(b) Assemble the sleeve (214) into the bellcrank lever (215).
(c) Move the bellcrank lever (215) inboard until you can install the bolt (213).
(d) Install the bolt (213), the washers (205) and the nut (204) on the cargo door frame.
(e) Tighten the nut (204) and safety it with the new AIPC 52-32-21-38-150 COTTER PIN (203).
(3) Attach the latch hook (210) to the cargo door frame as follows:
(a) Install the bushes (209) in the cargo door frame.
(b) Assemble the sleeve (211) into the latch hook (210).
(c) Move the latch hook (210) inboard until you can install the bolt (212).
(d) Install the bolt (212), the washers (208) and the nut (207).
(e) Tighten the nut (207) and safety it with the new cotter pin (206).
(f) Tighten the nut (207) and safety it with the new AIPC 52-32-21-38-030 COTTER PIN (206).
(4) Install the travel limit bolt (217), the washers (201) and the nut (202) on the cargo door frame.
F. Adjustment Procedure
(1) Adjust the length of the link rod (181) until the lower dead center of the applicable latching unit is correct (Ref. AMM TASK 52-32-11-820-002).
(2) Make sure that the latching units are correctly lubricated after the final adjustment. (Ref. AMM TASK 12-22-52-640-002).
Subtask 52-32-21-720-059-A 5. Close-up(1) Adjust the length of the link rod (181) until the lower dead center of the applicable latching unit is correct (Ref. AMM TASK 52-32-11-820-002).
(2) Make sure that the latching units are correctly lubricated after the final adjustment. (Ref. AMM TASK 12-22-52-640-002).
Subtask 52-32-21-865-085-A
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 52-32-21-410-063-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N30 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N31 |
| ** ON A/C ALL | |||
| 122VU | DOORS/CARGO | 1MJ | T12 |
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Apply Corrosion Preventive Compound_Water Displacing Soft Film - (Material No.12ABC1) or Corrosion Preventive Compound-Water Displacing Hard Film - (Material No.12ABB1) to all the components of the locking units and to the adjacent cargo
(3) Install the access panel 826AR on the cargo door.
(4) Remove the actuator safety locks and close the AFT cargo door (Ref. AMM TASK 52-30-00-860-002).
(5) Remove the access platform(s).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Apply Corrosion Preventive Compound_Water Displacing Soft Film - (Material No.12ABC1) or Corrosion Preventive Compound-Water Displacing Hard Film - (Material No.12ABB1) to all the components of the locking units and to the adjacent cargo
(3) Install the access panel 826AR on the cargo door.
(4) Remove the actuator safety locks and close the AFT cargo door (Ref. AMM TASK 52-30-00-860-002).
(5) Remove the access platform(s).