Deactivation of the Air Data Reference (ADR) 2 or 3 (FAA only)

TASK 34-10-00-040-003-A
Deactivation of the Air Data Reference (ADR) 2 or 3 (FAA only)

ZONE: 210
FIN: 1FP2
FIN: 1FP3

1. Reason for the Job
MMEL 34-10-01
ADR 2 OR 3 (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	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD

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)

3. Job Set-up
Subtask 34-10-00-861-064-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 34-10-00-865-098-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	ADIRS/ADIRU/2/26VAC AND AOA	5FP2	N08
121VU	ADIRS/ADIRU/3/26VAC AND AOA	5FP3	N07

4. Procedure
Subtask 34-10-00-040-051-A

A. Deactivation of the ADR 2 and ADR 3
(1) Do the step that follows to do the deactivation of the ADR 2.

ACTION	RESULT
1.On overhead panel 20VU, on the ADIRS CDU: Push the ADR 2 pushbutton switch.	On overhead panel 20VU, on the ADIRS CDU: The OFF legend of the ADR 2 pushbutton switch comes on.
	On the STATUS SD page: The message 'F/CTL MAINTENANCE' and the message 'SFCS MAINTENANCE' are shown.
2.On center pedestal 11VU, on SWITCHING panel 8VU: Set the AIR DATA selector switch on the F/O 3 position.
3.On circuit breaker panel 121VU: Open, safety and tag this(these) circuit breaker(s): 5FP2

(2) Do the step that follows to do the deactivation of the ADR 3.

ACTION	RESULT
1.On overhead panel 20VU, on the ADIRS CDU: Push the ADR 3 pushbutton switch.	On overhead panel 20VU, on the ADIRS CDU: The OFF legend of the ADR 3 pushbutton switch comes on.
	On the STATUS SD page: The message 'F/CTL MAINTENANCE' is shown.
2.On circuit breaker panel 121VU: Open, safety and tag this(these) circuit breaker(s): 5FP3

5. Close-up
Subtask 34-10-00-860-085-A

A. Put the aircraft back to its initial configuration.
(1) On overhead panel 20VU, on the ADIRS CDU, put a WARNING NOTICE(S) on the ADR 2 or ADR 3 pushbutton switches.
(2) Make an entry in the logbook.

Subtask 34-10-00-862-065-A

B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:23:00 UTC