W DOC AIRBUS | AMM A320F

Functional Check of ATC Antennas

TASK 34-52-00-720-006-A
Functional Check of ATC Antennas

1. Reason for the Job
Refer to the MPD TASK: 345200-02
FUNCTIONAL CHECK OF ATC ANTENNAS
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 6M (20 FT) - ADJUSTABLE
No specific
AR
ROD 2 M - TELESCOPIC
No specific
1
TEST UNIT - ATC TCAS
 B. Referenced Information
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 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 32-00-00-860-002-A
Ground Configuration after Flight Configuration with Electrical Power
TASK 32-00-00-860-002-A-01
Ground Configuration after Flight Configuration without Electrical Power
TASK 32-69-00-860-001-A
Simulation of Flight (With Aircraft on Ground)
3. Job Set-up
Subtask 34-52-00-861-055-A
A. Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
Subtask 34-52-00-480-052-A ** ON A/C NOT FOR ALL
B. If possible, install the TEST UNIT - ATC TCAS in the cockpit.
   (1) Put the antenna of the ATC ground test unit at 50cm (approx 2 ft.) from the ATC antennas.
NOTE: Use the ACCESS PLATFORM 6M (20 FT) - ADJUSTABLE or the ROD 2 M - TELESCOPIC to put the test antenna near the ATC top antenna.
   (2) Connect the antenna to the ATC ground test unit.
   (3) Set the ATC ground test unit to ON.
Subtask 34-52-00-480-052-C ** ON A/C NOT FOR ALL
B. If possible, install the TEST UNIT - ATC TCAS in the cockpit.
   (1) Put the antenna of the ATC ground test unit at 50cm (approx 2 ft.) from the ATC antennas.
NOTE: For the test of the ATC 2 function, you must use the TCAS antennas (not the ATC 2 antennas).
NOTE: Use the ACCESS PLATFORM 6M (20 FT) - ADJUSTABLE or the ROD 2 M - TELESCOPIC to put the test antenna near the ATC top antenna.
   (2) Connect the antenna to the ATC ground test unit.
   (3) Set the ATC ground test unit to ON.
Subtask 34-52-00-860-085-C ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
   (1) On the center pedestal, on the ATC/TCAS control unit, set:
  • ATC system 1(2) to on
  • ATC code 7776, or a different code that your local Authorities gave you, to keep the traffic interference to a minimum
  • The ALT RPTG/ON/OFF switch to OFF
  • The STBY/AUTO/ON selector switch to STBY.
   (2) On the center pedestal, on one Multipurpose Control & Display Unit (MCDU), get the LGCIU 1 (2) menu page and simulate a flight condition (Ref. AMM TASK 32-69-00-860-001).
NOTE: On the MCDU, on the L/G page, it is necessary to push the line key adjacent to the EXTENDED indication (not the UPLOCKED indication).
Subtask 34-52-00-860-085-K ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
   (1) On the center pedestal, on the ATC/TCAS control unit, set:
  • ATC system 1(2) on.
  • The ATC code 7776, or a different code given by your local authorities, to keep the traffic interference to a minimum.
  • The ALT RPT ON/OFF switch to OFF.
  • The SBY/ON/TA/RA-TA to SBY.
   (2) On the center pedestal, on one MCDU, get the LGCIU 1 (2) menu page and simulate a flight condition (Ref. AMM TASK 32-69-00-860-001).
NOTE: On the MCDU, on the L/G page, it is necessary to push the line key adjacent to the EXTENDED indication (not the UPLOCKED indication).
Subtask 34-52-00-860-085-V ** ON A/C NOT FOR ALL
C. Aircraft Maintenance Configuration
   (1) On the center pedestal, on the ATC/TCAS control unit, set:
  • ATC system 1(2) on.
  • The ATC code 7776, or a different code given by your local authorities, to keep the traffic interference to a minimum.
  • The STBY/ALT RPTG OFF/XPNDR/TA ONLY/TA-RA switch to STBY.
   (2) On the center pedestal, on one MCDU, get the LGCIU 1 (2) menu page and simulate a flight condition (Ref. AMM TASK 32-69-00-860-001).
NOTE: On the MCDU, on the L/G page, it is necessary to push the line key adjacent to the EXTENDED indication (not the UPLOCKED indication).
Subtask 34-52-00-865-059-A
D. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
49VUCOM NAV/ATC/15SH1G11
** ON A/C NOT FOR ALL
121VUCOM NAV/ATC/25SH2K07
** ON A/C NOT FOR ALL
121VUT/TISS2004SGK07
4. Procedure
Subtask 34-52-00-720-059-A ** ON A/C NOT FOR ALL
A. Functional Test of the ATC Antennas
NOTE: Do the test of ATC bottom antenna 1(2) first.
Then, do the test of ATC top antenna 1(2).
ACTION
RESULT
On the ATC/TCAS control unit:
  • set the STBY/AUTO/ON switch to AUTO.
On the ATC ground test unit,
the data display shows the code 7776, or the code given by the local authorities (see para. 3).
On the ATC/TCAS control unit:
  • Set the STBY/AUTO/ON switch to STBY.

Subtask 34-52-00-720-059-D ** ON A/C NOT FOR ALL
A. Functional Test of the Antennas
NOTE: Do the test of ATC bottom antenna 1(2) first.
Then, do the test of ATC top antenna 1(2).
ACTION
RESULT
On the ATC/TCAS control unit:
  • Set the STBY/ALT RPTG OFF/XPNDR/TA ONLY/TA-RA switch to XPNDR.
On the ATC ground test unit,
the data display shows the code 7776, or the code given by the local authorities (see para. 3).
On the ATC/TCAS control unit:
  • Set the STBY/ALT RPTG OFF/XPNDR/TA ONLY/TA-RA switch to STBY.

Subtask 34-52-00-720-059-G ** ON A/C NOT FOR ALL
A. Functional Test of the Antennas
NOTE: Do the test of ATC bottom antenna 1(2) first.
Then, do the test of ATC top antenna 1(2).
ACTION
RESULT
On the ATC/TCAS control unit:
  • Set the SBY/ON/TA/RA-TA switch to ON.
On the ATC ground test unit,
the data display shows the code 7776, or the code given by the local authorities (see para. 3).
On the ATC/TCAS control unit:
  • Set the SBY/ON/TA/RA-TA switch to SBY.

5. Close-up
Subtask 34-52-00-860-087-A
A. Put the aircraft back to its initial configuration.
   (1) Put the aircraft back to ground configuration after flight configuration with electrical power (Ref. AMM TASK 32-00-00-860-002).
   (2) Set the ATC ground test unit to OFF.
   (3) Remove the test antenna and the ground test unit.
Subtask 34-52-00-862-055-A
B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
[Rev.10 from 2021] 2026.04.02 06:23:31 UTC
"WTRUIB" 2025