DOC AIRBUS | AMM A320FRemoval of the HF Antenna Coupler
TASK 23-11-36-000-001-A
Removal of the HF Antenna Coupler
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 23-11-36-860-051-A ** ON A/C NOT FOR ALL
Subtask 23-11-36-020-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:11:58 UTC
Removal of the HF Antenna Coupler
WARNING:
MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | CAP - BLANKING |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 261 | AFT CABIN UTILITY AREA |
| 262 | AFT CABIN UTILITY AREA |
| 261CC | |
| FOR [4RE1] (COUPLER-HF, 1) | |
| 261CC | |
| FOR [4RE2] (COUPLER-HF, 2) | |
| 262CC | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 24-41-00-861-002-A | Energize the Aircraft Electrical Circuits from the External Power |
| TASK 24-41-00-861-002-A-01 | Energize the Aircraft Electrical Circuits from the APU |
| TASK 24-41-00-861-002-A-02 | Energize the Aircraft Electrical Circuits from Engine 1(2) |
| TASK 25-23-42-000-002-A | Removal of the Ceiling Panels - Aft Utility Area |
| FOR [4RE1] (COUPLER-HF, 1) | |
| TASK 25-23-42-000-002-A | Removal of the Ceiling Panels - Aft Utility Area |
| FOR [4RE2] (COUPLER-HF, 2) | |
| TASK 25-23-42-000-002-A | Removal of the Ceiling Panels - Aft Utility Area |
HF Antenna CouplerSubtask 23-11-36-860-051-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 23-11-36-860-051-GL ** ON A/C NOT FOR ALL (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
Subtask 23-11-36-860-052-A ** ON A/C NOT FOR ALL (1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
B. Aircraft Maintenance Configuration
(1) Make sure that the lights on the face of the transceiver are not on.
(2) On the related Radio Management Panel (RMP), set the ON/OFF selector switch to ON. Make sure that the RMP shows the last used frequency and function.
(3) Push the related HF1 (HF2) pushbutton switch and monitor that the integrated green LED comes on. The white SEL indicator light also comes on.
(4) With the dual selector knob set a station frequency in the STBY/CRS window.
(5) Push the transfer pushbutton switch (left-right arrow) between the two display windows to start the set frequency.
Subtask 23-11-36-860-052-GL ** ON A/C NOT FOR ALL (1) Make sure that the lights on the face of the transceiver are not on.
(2) On the related Radio Management Panel (RMP), set the ON/OFF selector switch to ON. Make sure that the RMP shows the last used frequency and function.
(3) Push the related HF1 (HF2) pushbutton switch and monitor that the integrated green LED comes on. The white SEL indicator light also comes on.
(4) With the dual selector knob set a station frequency in the STBY/CRS window.
(5) Push the transfer pushbutton switch (left-right arrow) between the two display windows to start the set frequency.
NOTE: This sets the antenna coupler to its 'home' position.
NOTE: It is not permitted to transmit on this set frequency. If you operate the transceiver to transmit, the 'home' position of the coupler is discarded.
NOTE: It is not permitted to remove the HF antenna coupler before it is set to its 'home' position.
NOTE: If you operated the transmitter by mistake, it is necessary to do the procedure given above again.
(6) On the related RMP, set the ON/OFF selector switch to OFF. B. Aircraft Maintenance Configuration
(1) Make sure that the lights on the face of the transceiver are off.
(2) On the related Radio Management Panel (RMP), set the ON/OFF selector switch to ON. Make sure that the RMP shows the last frequency and function used.
(3) Push the related HF1 (HF2) pushbutton switch and monitor that the integrated green LED comes on. Additionally the white SEL indicator light comes on.
(4) With the dual selector knob set a station frequency in the STBY/CRS window.
(5) Push the transfer pushbutton switch (left-right arrow) between the two display windows to start the set frequency. This sets the antenna coupler to its 'home' position.
Subtask 23-11-36-865-067-A (1) Make sure that the lights on the face of the transceiver are off.
(2) On the related Radio Management Panel (RMP), set the ON/OFF selector switch to ON. Make sure that the RMP shows the last frequency and function used.
(3) Push the related HF1 (HF2) pushbutton switch and monitor that the integrated green LED comes on. Additionally the white SEL indicator light comes on.
(4) With the dual selector knob set a station frequency in the STBY/CRS window.
(5) Push the transfer pushbutton switch (left-right arrow) between the two display windows to start the set frequency. This sets the antenna coupler to its 'home' position.
NOTE: You must not transmit on this set frequency. If you activate the transceiver to transmit, the 'home' position of the coupler is discarded.
NOTE: The HF antenna coupler must not be removed before it is set to its 'home' position.
NOTE: If you activated the transmitter by mistake, do the procedure described above again.
(6) On the related RMP, set the ON/OFF selector switch to OFF. C. Open, safety and tag this(these) circuit breaker(s):
Subtask 23-11-36-010-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 49VU | HF1 | 1RE1 | HA14 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | COM NAV/HF2 | 1RE2 | L13 |
D. Get Access
(1) Remove the ceiling panel 261CC in the AFT cabin utility area (Ref. AMM TASK 25-23-42-000-002).
Subtask 23-11-36-010-050-B ** ON A/C NOT FOR ALL (1) Remove the ceiling panel 261CC in the AFT cabin utility area (Ref. AMM TASK 25-23-42-000-002).
D. Get Access
(1) FOR [4RE1] (COUPLER-HF, 1)
Remove the ceiling panel 261CC in the aft cabin utility area (Ref. AMM TASK 25-23-42-000-002).
(2) FOR [4RE2] (COUPLER-HF, 2)
Remove the ceiling panel 262CC in the aft cabin utility area (Ref. AMM TASK 25-23-42-000-002).
Subtask 23-11-36-010-050-GL ** ON A/C NOT FOR ALL (1) FOR [4RE1] (COUPLER-HF, 1)
Remove the ceiling panel 261CC in the aft cabin utility area (Ref. AMM TASK 25-23-42-000-002).
(2) FOR [4RE2] (COUPLER-HF, 2)
Remove the ceiling panel 262CC in the aft cabin utility area (Ref. AMM TASK 25-23-42-000-002).
D. Get Access
(1) Remove the ceiling panel 261CC in the AFT cabin utility area (Ref. AMM TASK 25-23-42-000-002).
4. Procedure(1) Remove the ceiling panel 261CC in the AFT cabin utility area (Ref. AMM TASK 25-23-42-000-002).
Subtask 23-11-36-020-050-A ** ON A/C NOT FOR ALL
A. Removal of the HF Antenna Coupler
(1) Disconnect the electrical connectors (2) from the related receptacles of the HF antenna coupler (1).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Loosen the knurled nuts (3) and lower the fasteners.
(4) Carefully remove the HF antenna coupler (1) from the rack (4).
(5) Put the CAP - BLANKING on the disconnected electrical connector (6) and the receptacle (5).
Subtask 23-11-36-020-050-GL ** ON A/C NOT FOR ALL (1) Disconnect the electrical connectors (2) from the related receptacles of the HF antenna coupler (1).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Loosen the knurled nuts (3) and lower the fasteners.
(4) Carefully remove the HF antenna coupler (1) from the rack (4).
(5) Put the CAP - BLANKING on the disconnected electrical connector (6) and the receptacle (5).
A. Removal of the HF Antenna Coupler
(1) Disconnect the electrical connectors (2) from the antenna coupler (1).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Loosen the knurled nuts (3) and lower the fasteners.
(5) Put blanking caps on the disconnected electrical connectors (5) and (6).
(6) If the aircraft is operated, when the antenna coupler is removed, make sure that:
(a) FOR [4RE1] (COUPLER-HF, 1)
The electrical connectors (2) are connected to the related dummy plugs, which are installed near to frame C68.
(b) FOR [4RE2]
The alternative SHIELD ASSY - EMI P/N A9239825400000 is installed and the electrical connectors (2) are connected to it.
(1) Disconnect the electrical connectors (2) from the antenna coupler (1).
(2) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(3) Loosen the knurled nuts (3) and lower the fasteners.
CAUTION:
CAREFULLY PUT THE COUPLER DOWN ON ITS BOTTOM PLATE ONLY. IF YOU PUT THE COUPLER DOWN ON ITS END, YOU CAN CAUSE INTERNAL DAMAGE.
(4) Carefully remove the antenna coupler (1) from the rack (4). (5) Put blanking caps on the disconnected electrical connectors (5) and (6).
(6) If the aircraft is operated, when the antenna coupler is removed, make sure that:
(a) FOR [4RE1] (COUPLER-HF, 1)
The electrical connectors (2) are connected to the related dummy plugs, which are installed near to frame C68.
(b) FOR [4RE2]
The alternative SHIELD ASSY - EMI P/N A9239825400000 is installed and the electrical connectors (2) are connected to it.