Operational Test of the Indicator Lights and Displays of the FCU

TASK 22-10-00-710-005-A
Operational Test of the Indicator Lights and Displays of the FCU

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

ZONE: 210

1. Reason for the Job
To do a check of the indicator lights and displays of the FCU.
2. Job Set-up Information
A. Work Zones and Access Panels

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

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)

3. Job Set-up
Subtask 22-10-00-861-054-A

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

Subtask 22-10-00-865-054-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FCU/1	9CA1	B05
49VU	AUTO FLT/FMGC/1	10CA1	B02
** ON A/C NOT FOR ALL
49VU	AUTO FLT/FCU/1	9CA1	H11
49VU	AUTO FLT/FMGC/1	10CA1	H08
** ON A/C ALL
121VU	AUTO FLT/FCU/2	9CA2	M21
121VU	AUTO FLT/FMGC/2	10CA2	M17
122VU	LIGHTING/TST/BOARD/SPLY	30LP	X06

4. Procedure
Subtask 22-10-00-710-055-B

A. Do this test:

ACTION	RESULT
1.On the overhead panel, on the panel 25VU: Make sure that the ANN LT switch is set to DIM.
2.On the panel 25VU: Set the ANN LT switch to TEST.	On the FCU: The 3 green bars on the pushbutton switches come on. All the segments in the display windows and the three associated green indicator lights come on.
3.Set the ANN LT switch to DIM.	You must get the same result as in step 1.

5. Close-up
Subtask 22-10-00-862-054-A

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

[Rev.10 from 2021] 2026.03.31 23:09:53 UTC