DOC AIRBUS | AMM A320FInstallation of the Control Unit
TASK 25-27-34-400-001-A
Installation of the Control Unit
1. Reason for the Job
Self Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 25-27-34-860-050-A ** ON A/C NOT FOR ALL
Subtask 25-27-34-420-050-A ** ON A/C NOT FOR ALL
Subtask 25-27-34-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.03.31 23:32:56 UTC
Installation of the Control 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 | AR | ACCESS PLATFORM 2M (6 FT) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 152FW | |
| FOR [14DS] (CTL UNIT-DOOR AREA HEATING) | |
| 152FW | |
| FOR [4DS] (CTL UNIT-DOOR AREA HEATING) | |
| 132JW | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-42-00-861-001-A | Energize the Ground Service Network from the External Power |
| TASK 24-42-00-862-001-A | De-energize the Ground Service Network Supplied from the External Power |
| TASK 25-27-00-740-001-A | Bite Test of the Heated Floor Panel System |
| TASK 25-55-12-000-003-A | Removal of the Sidewall Panels in the Aft Cargo Compartment - FR59/FR65 |
| TASK 25-55-12-400-003-A | Installation of the Sidewall Panels in the Aft Cargo Compartment - FR59/FR65 |
| 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 |
| FOR [14DS] (CTL UNIT-DOOR AREA HEATING) | |
| TASK 25-55-12-000-003-A | Removal of the Sidewall Panels in the Aft Cargo Compartment - FR59/FR65 |
| TASK 25-55-12-400-003-A | Installation of the Sidewall Panels in the Aft Cargo Compartment - FR59/FR65 |
| 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 |
| FOR [4DS] (CTL UNIT-DOOR AREA HEATING) | |
| TASK 25-54-12-000-003-A | Removal of the Sidewall Panels in the Forward Cargo Compartment |
| TASK 25-54-12-400-003-A | Installation of the Sidewall Panels in the Forward Cargo Compartment |
| 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 |
Control Unit 4DS, 14DSSubtask 25-27-34-860-050-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position adjacent to the FWD or AFT cargo compartment doors as required.
(3) FOR [4DS] (CTL UNIT-DOOR AREA HEATING)
(a) Make sure that the FWD cargo compartment door is open (Ref. AMM TASK 52-30-00-860-001).
(b) Make sure that the FWD CARGO COMPT light switch 6LU is set to ON.
(4) FOR [14DS] (CTL UNIT-DOOR AREA HEATING)
(a) Make sure that the AFT cargo compartment door is open (Ref. AMM TASK 52-30-00-860-001).
(b) Make sure that the AFT CARGO COMPT light switch 8LU is set to ON.
Subtask 25-27-34-010-052-A ** ON A/C NOT FOR ALL (1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position adjacent to the FWD or AFT cargo compartment doors as required.
(3) FOR [4DS] (CTL UNIT-DOOR AREA HEATING)
(a) Make sure that the FWD cargo compartment door is open (Ref. AMM TASK 52-30-00-860-001).
(b) Make sure that the FWD CARGO COMPT light switch 6LU is set to ON.
(4) FOR [14DS] (CTL UNIT-DOOR AREA HEATING)
(a) Make sure that the AFT cargo compartment door is open (Ref. AMM TASK 52-30-00-860-001).
(b) Make sure that the AFT CARGO COMPT light switch 8LU is set to ON.
B. Aircraft Maintenance Configuration
(1) FOR [4DS] (CTL UNIT-DOOR AREA HEATING)
(a) Make sure that the sidewall panel 132JW is removed (Ref. AMM TASK 25-54-12-000-003).
(2) FOR [14DS] (CTL UNIT-DOOR AREA HEATING)
(a) Make sure that the sidewall panel 152FW is removed (Ref. AMM TASK 25-55-12-000-003).
Subtask 25-27-34-860-050-B ** ON A/C NOT FOR ALL (1) FOR [4DS] (CTL UNIT-DOOR AREA HEATING)
(a) Make sure that the sidewall panel 132JW is removed (Ref. AMM TASK 25-54-12-000-003).
(2) FOR [14DS] (CTL UNIT-DOOR AREA HEATING)
(a) Make sure that the sidewall panel 152FW is removed (Ref. AMM TASK 25-55-12-000-003).
C. Aircraft Maintenance Configuration
(1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position adjacent to the aft cargo compartment doors as required.
(3) Make sure that the aft cargo compartment door is open (Ref. AMM TASK 52-30-00-860-001).
(4) Make sure that the AFT CARGO COMPT light switch 8LU is set to ON.
Subtask 25-27-34-010-052-B ** ON A/C NOT FOR ALL (1) Make sure that the ground service network is energized
(Ref. AMM TASK 24-42-00-861-001).
(2) Make sure that the ACCESS PLATFORM 2M (6 FT) is in position adjacent to the aft cargo compartment doors as required.
(3) Make sure that the aft cargo compartment door is open (Ref. AMM TASK 52-30-00-860-001).
(4) Make sure that the AFT CARGO COMPT light switch 8LU is set to ON.
D. Aircraft Maintenance Configuration
(1) Make sure that the sidewall panel 152FW is removed (Ref. AMM TASK 25-55-12-000-003).
Subtask 25-27-34-865-051-A ** ON A/C NOT FOR ALL (1) Make sure that the sidewall panel 152FW is removed (Ref. AMM TASK 25-55-12-000-003).
E. 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 | |||
| 122VU | ELEC/GALLEY/CNTOR | 7MC | S28 |
| ** ON A/C NOT FOR ALL | |||
| 2000VU | DR AREA HTG PNLS-CTL | 3DS | F08 |
| 2000VU | DR AREA HTG PANELS-DR2-FPH | 1DS | F07 |
| ** ON A/C NOT FOR ALL | |||
| 2000VU | DR AREA HTG PANELS-DR2-HTR | 1DS | A08 |
| 2000VU | DR AREA HTG PANELS-DR2-CTL | 3DS | A06 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | DOOR AREA HTG PNL-DOOR3-HTR | 11DS | F05 |
| 2001VU | DR AREA HTG PNLS-DOOR 3-CTL | 13DS | F03 |
Subtask 25-27-34-420-050-A ** ON A/C NOT FOR ALL
A. Installation of the Control Unit 4DS, 14DS
(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) FOR [4DS] (CTL UNIT-DOOR AREA HEATING)
(a) Carefully slide the control unit (9) on the adapter assembly (8).
(a) Install the control unit (4) with the brackets (5), the washers (7) and the screws (6) on the support structure (3).
(6) Remove the CAP-BLANKING from each electrical connector and receptacle.
(7) Make sure that all the electrical connections are clean and in the correct condition.
(8) Connect the electrical connector (1).
(9) Safety the electrical connector (1) with the spring latches (2).
Subtask 25-27-34-420-050-B ** 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) FOR [4DS] (CTL UNIT-DOOR AREA HEATING)
(a) Carefully slide the control unit (9) on the adapter assembly (8).
NOTE: Make sure that the locking catch (10) holds the control unit (9) in position.
(5) FOR [14DS] (CTL UNIT-DOOR AREA HEATING)(a) Install the control unit (4) with the brackets (5), the washers (7) and the screws (6) on the support structure (3).
(6) Remove the CAP-BLANKING from each electrical connector and receptacle.
(7) Make sure that all the electrical connections are clean and in the correct condition.
(8) Connect the electrical connector (1).
(9) Safety the electrical connector (1) with the spring latches (2).
A. Installation of the Control Unit 14DS
(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) Install the control unit (7) with the brackets (4), the washers (5) and the screws (6) on the support structure (3).
(5) Remove the CAP-BLANKING from each electrical connector and receptacle.
(6) Make sure that all the electrical connections are clean and in the correct condition.
(7) Connect the electrical connector (1).
Subtask 25-27-34-865-052-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) Install the control unit (7) with the brackets (4), the washers (5) and the screws (6) on the support structure (3).
(5) Remove the CAP-BLANKING from each electrical connector and receptacle.
(6) Make sure that all the electrical connections are clean and in the correct condition.
(7) Connect the electrical connector (1).
CAUTION:
MAKE SURE THAT THE SPRING LATCHES CORRECTLY HOLD THE CONNECTOR IN THE FULLY ENGAGED POSITION. THE SPRING LATCHES PREVENT UNWANTED MOVEMENT OF THE CONNECTOR, AND THUS THE RISK OF ARCING, WHICH CAN CAUSE DAMAGE TO THE UNIT.
(8) Safety the electrical connector (1) with the spring latches (2). B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 25-27-34-740-050-A ** ON A/C NOT FOR ALL 5. Close-up| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 122VU | ELEC/GALLEY/CNTOR | 7MC | S28 |
| ** ON A/C NOT FOR ALL | |||
| 2000VU | DR AREA HTG PNLS-CTL | 3DS | F08 |
| 2000VU | DR AREA HTG PANELS-DR2-FPH | 1DS | F07 |
| ** ON A/C NOT FOR ALL | |||
| 2000VU | DR AREA HTG PANELS-DR2-HTR | 1DS | A08 |
| 2000VU | DR AREA HTG PANELS-DR2-CTL | 3DS | A06 |
| ** ON A/C NOT FOR ALL | |||
| 2001VU | DOOR AREA HTG PNL-DOOR3-HTR | 11DS | F05 |
| 2001VU | DR AREA HTG PNLS-DOOR 3-CTL | 13DS | F03 |
Subtask 25-27-34-410-050-A ** ON A/C NOT FOR ALL
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) FOR [4DS] (CTL UNIT-DOOR AREA HEATING)
(a) Install the sidewall panel 132JW (Ref. AMM TASK 25-54-12-400-003).
(b) Set the FWD CARGO COMPT light switch 6LU to OFF.
(c) Close the FWD cargo compartment door (Ref. AMM TASK 52-30-00-860-002).
(3) FOR [14DS] (CTL UNIT-DOOR AREA HEATING)
(a) Install the sidewall panel 152FW (Ref. AMM TASK 25-55-12-400-003).
(b) Set the AFT CARGO COMPT light switch 8LU to OFF.
(c) Close the AFT cargo compartment door (Ref. AMM TASK 52-30-00-860-002).
(4) Remove the access platform(s).
Subtask 25-27-34-410-050-B ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) FOR [4DS] (CTL UNIT-DOOR AREA HEATING)
(a) Install the sidewall panel 132JW (Ref. AMM TASK 25-54-12-400-003).
(b) Set the FWD CARGO COMPT light switch 6LU to OFF.
(c) Close the FWD cargo compartment door (Ref. AMM TASK 52-30-00-860-002).
(3) FOR [14DS] (CTL UNIT-DOOR AREA HEATING)
(a) Install the sidewall panel 152FW (Ref. AMM TASK 25-55-12-400-003).
(b) Set the AFT CARGO COMPT light switch 8LU to OFF.
(c) Close the AFT cargo compartment door (Ref. AMM TASK 52-30-00-860-002).
(4) Remove the access platform(s).
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the sidewall panel 152FW (Ref. AMM TASK 25-55-12-400-003).
(3) Set the AFT CARGO COMPT light switch 8LU to OFF.
(4) Close the aft cargo compartment door (Ref. AMM TASK 52-30-00-860-002).
(5) Remove the access platform(s).
Subtask 25-27-34-862-050-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the sidewall panel 152FW (Ref. AMM TASK 25-55-12-400-003).
(3) Set the AFT CARGO COMPT light switch 8LU to OFF.
(4) Close the aft cargo compartment door (Ref. AMM TASK 52-30-00-860-002).
(5) Remove the access platform(s).