Deactivation of the Traffic Collision Avoidance System (TCAS)

TASK 34-43-00-040-802-A
Deactivation of the Traffic Collision Avoidance System (TCAS)

ZONE: 211

1. Reason for the Job
MMEL 34-40-05A
TRAFFIC COLLISION AVOIDANCE SYSTEM (TCAS) (FAA ONLY)
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
211	COCKPIT

C. 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 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 34-10-00-860-004-A	Inertial Reference (IR) Alignment-Procedure
TASK 34-10-00-860-004-A-01	Automatic Inertial Reference (IR) Alignment-Procedure
TASK 34-10-00-860-004-A-02	Inertial Reference (IR) Alignment-Procedure to do a Check of the Links between each Flight Management and Guidance Computer (FMGC) and the three Air Data/Inertial Reference Units (ADIRUs)
TASK 34-10-00-860-005-A	ADIRS Stop Procedure

3. Job Set-up
Subtask 34-43-00-860-161-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).
(2) Do the Electronic Instrument System (EIS) start procedure (PFDs and NDs only) (Ref. AMM TASK 31-60-00-860-001).
(3) Do the Inertial Reference (IR) alignment procedure (Ref. AMM TASK 34-10-00-860-004).
(4) On the Electronic Flight Instrument System (EFIS) control sections of the Flight Control Unit (FCU):

Set the mode selector switches to ROSE.
Set the scale selector switches to 10.

Subtask 34-43-00-865-161-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM NAV/ATC/1	5SH1	G11
121VU	COM NAV/TCAS	4SG	K10
121VU	COM NAV/ATC/2	5SH2	K07

4. Procedure
Subtask 34-43-00-040-056-A ** ON A/C NOT FOR ALL

A. Deactivation of the TCAS
(1) On rear circuit-breaker panel 121VU:
(a) Open, safety and tag this(these) circuit breaker(s):
1 4SG (ignore the related warnings).
(b) Put an applicable placard in position in the cockpit (refer to your standard practices and local regulations).

5. Close-up
Subtask 34-43-00-860-212-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the Air Traffic Control (ATC)/TCAS control unit:

Put the WARNING NOTICE(S) to tell persons not to operate the TCAS.

(2) Make an entry in the logbook.

Subtask 34-43-00-860-162-A ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) Do the Air Data/Inertial Reference System (ADIRS) stop procedure (Ref. AMM TASK 34-10-00-860-005).
(2) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(3) Make an entry in the logbook.
(4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(5) Make sure that the work area is clean and clear of tools and other items.

[Rev.10 from 2021] 2026.04.02 06:23:26 UTC