Verification of the ATC Mode S address (ICAO Change)

TASK 34-52-00-720-802-A
Verification of the ATC Mode S address (ICAO Change)

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. 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 31-32-00-860-010-A	Procedure to Get Access to the SYSTEM REPORT/TEST NAV Page

3. Job Set-up
Subtask 34-52-00-860-106-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) On the SWITCHING panel 8VU:

Make sure that the AIR DATA selector switch is set to NORM.

Subtask 34-52-00-860-104-B ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ATC/TCAS control unit:

Start the ATC system 1(2)
Enter the ATC code 7776, or a different code given by your local authorities, to keep the traffic interference to a minimum
Set the ALT RPTG/ON/OFF switch to ON
Set the AUTO/ON/STBY switch to AUTO.

Subtask 34-52-00-860-104-E ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ATC/TCAS control unit:

Start ATC system 1(2).
Set ATC code 7776, or a different code from your local authorities, to keep the traffic interference to a minimum.
Set the ALT RPT/OFF/ON switch to ON.
Set the SBY/ON/TA/RA-TA switch to ON.

(2) In the procedure that follows, before you push the SELECT key to get the MODE S UF16 TEST page (only for this page):

Set the SBY/ON/TA/RA-TA switch to RA-TA.
Set the SBY/ON/TA/RA-TA switch to ON again, before you get access to the next page.

Subtask 34-52-00-860-104-J ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ATC/TCAS control unit:

Start the ATC system 1(2)
Enter the ATC code 7776, or a different code given by your local authorities, to keep the traffic interference to a minimum
Set the STBY/ALT RPTG OFF/XPNDR/TA ONLY/TA-RA switch to XPNDR.

Subtask 34-52-00-865-078-A

C. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	NAV/MMR/1	42RT1	G12
49VU	COM NAV/ATC/1	5SH1	G11
** ON A/C NOT FOR ALL
121VU	COM NAV/MMR/2	42RT2	K09
** ON A/C NOT FOR ALL
121VU	COM NAV/TCAS	4SG	K10
121VU	COM NAV/ATC/2	5SH2	K07
** ON A/C NOT FOR ALL
121VU	COM NAV/MMR/2	42RT2	L07
** ON A/C NOT FOR ALL
121VU	T/TISS	2004SG	K07

4. Procedure
Subtask 34-52-00-720-071-A ** ON A/C NOT FOR ALL

A. Functional Test of the ATC MODE S

NOTE: Do the test for the system 1.
Then, do the test for the system 2.

NOTE: There are many different types of test benches. This procedure gives a typical test sequence. The test sequence can change with the test bench used.

NOTE: For Elementary Surveillance (ELS) and Enhanced Surveillance (EHS) capable transponders, use an Extended Squitters (ES) capable test set.

(1) Put the test antenna in position in the line sight of the ATC1(2) top antenna.

ACTION	RESULT
1.Set the test set (or bench) for:	The test set must show:
- Interrogation MODE S	- MODE S aircraft code: XXXXXX (the aircraft code has 6 digits and agrees with the 24-bit Mode S address).

Subtask 34-52-00-720-071-B ** ON A/C NOT FOR ALL

A. Check of the "MODE S ADDRESS"
(1) Get access to the "SYSTEM REPORT/TEST NAV" page (Ref. AMM TASK 31-32-00-860-010).

ACTION	RESULT
1. On the Multipurpose Control and Display Unit (MCDU):	On the MCDU:
- On the "SYSTEM REPORT/TEST NAV" page, push the line select key adjacent to the "ATC1(ATC2)" indication.	- The "ATC1(ATC2)" page comes into view.
2. On the "ATC1(ATC2)" page, push the line select key adjacent to the "DISCRETE CONFIG" indication.	- The "ATC1(ATC2) 1/2" page comes into view.
3. On the "ATC1(ATC2) 1/2" page:
- Push the line select key adjacent to the "MODE S ADDRESS" indication.	- The "MODE S ADDRESS" page comes into view.
- Make sure that "MODE S ADDRESS: XXXXXX (HEX)" is correct.
4. Push the line select key adjacent to the "RETURN" indication.	- The "ATC1(ATC2) 1/2" page comes into view.
5. Push the line select key adjacent to the "RETURN" indication.	- The "ATC1(ATC2)" page comes into view.
6. Push the line select key adjacent to the "RETURN" indication.	- The "SYSTEM REPORT/TEST NAV" page comes into view.

Subtask 34-52-00-720-071-D ** ON A/C NOT FOR ALL

A. Check of the "MODE S ADDRESS"
(1) Get access to the "SYSTEM REPORT/TEST NAV" page (Ref. AMM TASK 31-32-00-860-010).

ACTION	RESULT
1. On the Multipurpose Control and Display Unit (MCDU):	On the MCDU:
- On the "SYSTEM REPORT/TEST NAV" page, push the line select key adjacent to the "ATC1(ATC2)" indication.	- The "ATC1(ATC2)" page comes into view.
2. On the "ATC1(ATC2)" page, push the line select key adjacent to the "DISCRETE CONFIGURATION" indication.	- The "ATC1(ATC2) 1/2" page comes into view.
3. On the "ATC1(ATC2) 1/2" page:
- Push the line select key adjacent to the "MODE S ADDRESS" indication.	- The "MODE S ADDRESS" page comes into view.
- Make sure that "MODE S ADDRESS: XXXXXX (HEX)" is correct.
4. Push the line select key adjacent to the "RETURN" indication.	- The "ATC1(ATC2) 1/2" page comes into view.
5. Push the line select key adjacent to the "RETURN" indication.	- The "ATC1(ATC2)" page comes into view.
6. Push the line select key adjacent to the "RETURN" indication.	- The "SYSTEM REPORT/TEST NAV" page comes into view.

Subtask 34-52-00-720-071-E ** ON A/C NOT FOR ALL

A. Check of the "MODE S ADDRESS"
(1) Get access to the "SYSTEM REPORT/TEST NAV" page (Ref. AMM TASK 31-32-00-860-010).

ACTION	RESULT
1. On the Multipurpose Control and Display Unit (MCDU):	On the MCDU:
- On the "SYSTEM REPORT/TEST NAV" page, push the line select key adjacent to the "ATC1(ATC2)" indication.	- The "ATC1(ATC2)" page comes into view.
2. On the "ATC1(ATC2)" page, push the line select key adjacent to the "DISCRETE DATA" indication.	- The "ATC1(ATC2) 1/2" page comes into view.
3. On the "ATC1(ATC2) 1/2" page:
- Push the line select key adjacent to the "MODE S ADDRESS" indication.	- The "MODE S ADDRESS" page comes into view.
- Make sure that "MODE S ADDRESS: XXXXXX (HEX)" is correct.
4. Push the line select key adjacent to the "RETURN" indication.	- The "ATC1(ATC2) 1/2" page comes into view.
5. Push the line select key adjacent to the "RETURN" indication.	- The "ATC1(ATC2)" page comes into view.
6. Push the line select key adjacent to the "RETURN" indication.	- The "SYSTEM REPORT/TEST NAV" page comes into view.

5. Close-up
Subtask 34-52-00-860-105-B ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) On the center pedestal, on the ATC/TCAS control unit, set:

the ALT RPTG ON/OFF switch to OFF
the ON/AUTO/STBY switch to STBY.

(2) Remove the test antenna and the test set.
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 34-52-00-860-105-E ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) On the center pedestal, on the ATC/TCAS control unit, set:

the ALT RPT ON/OFF switch to OFF
the SBY/ON/TA/RA-TA switch to SBY.

(2) Remove the test antenna and the test set.
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 34-52-00-860-105-I ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) On the center pedestal, on the ATC/TCAS control unit, set:

the STBY/ALT RPTG OFF/XPNDR/TA ONLY/TA/RA switch to STBY.

(2) Remove the test antenna and the test set.
(3) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

Subtask 34-52-00-080-052-A

B. Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:23:32 UTC