Reactivation of the Traffic Alert and Collision Avoidance System (TCAS)

TASK 34-43-00-440-001-A
Reactivation of the Traffic Alert and 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. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
211	COCKPIT

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 34-43-00-740-001-A	BITE Test of the TCAS

3. Job Set-up
Subtask 34-43-00-860-069-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 34-43-00-865-147-A ** ON A/C NOT FOR ALL

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	COM NAV/TCAS	4SG	K10

4. Procedure
Subtask 34-43-00-440-050-A ** ON A/C NOT FOR ALL

A. Reactivation of the TCAS
(1) If the TCAS is deactivated, do the step that follows:
(a) On rear circuit-breaker panel 121VU:
1 Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
a 4SG.
(b) In the cockpit, remove the PLACARD.
(c) Do the BITE test of the TCAS (Ref. AMM TASK 34-43-00-740-001).

5. Close-up
Subtask 34-43-00-860-070-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(2) 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