Check of the ADIRS CDU Brightness and Display

TASK 34-10-00-710-001-A
Check of the ADIRS CDU Brightness and Display

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
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
210	CKPT,FWD COMPT BHD TO FLT COMPT BULKHEAD
822

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 34-10-00-860-063-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) On the panel 20VU, on the ADIRS CDU, make sure that the three OFF/NAV/ATT selector switches are at OFF.

Subtask 34-10-00-010-063-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Put the ACCESS PLATFORM 1M(3 FT) in position at the access door 822.
(2) Open the access door 822.
(3) On the battery power center 105VU:

Loosen the two screws and remove the protective cover.

Subtask 34-10-00-865-050-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	NAV PROBES/ADIRU3/PWR/SWTG	8FP	F09
49VU	NAV PROBES/ADIRU 1/AND AOA 1/26VAC	5FP1	F07
49VU	NAV PROBES/ADIRU1/115VAC	4FP1	F06
105VU	ADIRS/ADIRU1/28VDC	6FP1	C02
121VU	ADIRS/ADIRU/2PWR/SHED	10FP	N10
121VU	ADIRS/ADIRU/3PWR/SWTG	9FP	N09
121VU	ADIRS/ADIRU/2/26VAC AND AOA	5FP2	N08
121VU	ADIRS/ADIRU/3/26VAC AND AOA	5FP3	N07
121VU	ADIRS/ADIRU/2/115VAC	4FP2	N06
121VU	ADIRS/ADIRU/3/115VAC	4FP3	N05
121VU	ADIRS/ADIRU/2/28VDC	6FP2	N04
121VU	ADIRS/ADIRU/3/28VDC	6FP3	N03

4. Procedure
Subtask 34-10-00-710-050-A ** ON A/C NOT FOR ALL

A. Check from the ADIRS CDU:

ACTION	RESULT
1.On the ADIRS CDU: Set the three OFF/NAV/ATT selector switches to NAV.
Set the DATA DISPLAY selector switch to TEST and keep it in this position.	The display (LCD) segments come on The ENT and CLR keys come on green.
2.Release the DATA DISPLAY selector switch.

Subtask 34-10-00-710-051-A ** ON A/C NOT FOR ALL

B. Check from the INT LT ANN LT switch:

ACTION	RESULT
1.On the panel 25VU, set the INT LT ANN LT switch to TEST.	On the ADIRS CDU: The display (LCD) segments come on The ENT and CLR keys come on green The ON BAT light comes on The FAULT/OFF legends of the ADR pushbutton switches come on. The FAULT/ALIGN legends of the IR annunciators come on.
2.Set the INT LT ANN LT switch to BRT or DIM.

5. Close-up
Subtask 34-10-00-860-064-A ** ON A/C NOT FOR ALL

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

Subtask 34-10-00-410-063-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Install the protective cover on the battery power center 105VU.
(2) Tighten the two screws.
(3) Close the access door 822.
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 07:14:02 UTC