W DOC AIRBUS | AMM A320F

Installation of the Very High Frequency (VHF) Transceiver

TASK 23-12-33-400-001-A
Installation of the Very High Frequency (VHF) Transceiver

ZONE: 127
ZONE: 128
FIN: 1RC1 ** ON A/C NOT FOR ALL
FIN: 1RC2 ** ON A/C NOT FOR ALL
FIN: 1RC3 ** ON A/C NOT FOR ALL
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 2M (6 FT) - ADJUSTABLE
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
127
REAR AVIONIC COMPARTMENT
128
REAR AVIONIC COMPARTMENT
824
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 23-12-00-710-001-A
Operational Test of the Very High Frequency (VHF) System
TASK 23-12-00-740-001-A
BITE Test of the Very High Frequency (VHF) System
TASK 24-41-00-862-002-A
De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01
De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02
De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 46-21-00-710-002-A
VHF 3 Link Test of the ATSU
TASK 52-41-00-410-002-A
Close the Avionics Compartment Doors after Access
F VHF Transceiver
3. Job Set-up
Subtask 23-12-33-860-050-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the access door 824 in zone 128.
   (2) Make sure that the access door 824 is open.
Subtask 23-12-33-865-051-A ** ON A/C NOT FOR ALL
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1RC1 (XCVRVHF, 1)
49VUCOM/VHF/12RC1G09
** ON A/C NOT FOR ALL
FOR FIN: 1RC2 (XCVRVHF, 2)
121VUCOM NAV/VHF/22RC2L04
** ON A/C NOT FOR ALL
121VUCOM/VHF/22RC2L04
** ON A/C NOT FOR ALL
FOR FIN: 1RC3 (XCVRVHF, 3)
121VUCOM NAV/VHF/32RC3L05
** ON A/C NOT FOR ALL
121VUCOM/VHF/32RC3L05
4. Procedure
Subtask 23-12-33-420-050-A ** ON A/C NOT FOR ALL
A. Installation of the VHF Transceiver
   (1) Clean the component interfaces and the adjacent area.
   (2) Do an inspection of the component interfaces and the adjacent area.
   (3) Remove the blanking caps from the electrical connectors (1).
   (4) Make sure that the electrical connectors (1) are clean and in the correct condition.
   (5) Install the VHF transceiver (5) on its rack (2).
   (6) Push the VHF transceiver (5) on its rack (2) to connect the electrical connectors(1).
   (7) Engage the nuts (3) on the lugs (4) and tighten.
Subtask 23-12-33-865-052-A ** ON A/C NOT FOR ALL
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
FOR FIN: 1RC1 (XCVRVHF, 1)
49VUCOM/VHF/12RC1G09
** ON A/C NOT FOR ALL
FOR FIN: 1RC2 (XCVRVHF, 2)
121VUCOM NAV/VHF/22RC2L04
** ON A/C NOT FOR ALL
121VUCOM/VHF/22RC2L04
** ON A/C NOT FOR ALL
FOR FIN: 1RC3 (XCVRVHF, 3)
121VUCOM NAV/VHF/32RC3L05
** ON A/C NOT FOR ALL
121VUCOM/VHF/32RC3L05
Subtask 23-12-33-740-050-A ** ON A/C NOT FOR ALL
C. Do the BITE test of the VHF system (Ref. AMM TASK 23-12-00-740-001)
NOTE: As an alternative procedure, you can do this operational test without the CFDS (Ref. AMM TASK 23-12-00-710-001).
Subtask 23-12-33-710-053-A ** ON A/C NOT FOR ALL
D. Do the VHF 3 link test of the ATSU (Ref. AMM TASK 46-21-00-710-002) to do a check of the correct operation of the datalink communication.
5. Close-up
Subtask 23-12-33-410-050-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) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
   (3) Remove the access platform(s).
   (4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002)
[Rev.10 from 2021] 2026.04.02 06:12:00 UTC
"WTRUIB" 2025