SYSTEM TEST of the Inertial Reference (IR)

TASK 34-14-00-740-004-A
SYSTEM TEST of the Inertial Reference (IR)

NOTE: If you do the test while the aircraft is in a hangar, the GPS/MMR faults will be generated if the GPS satellite signal is not available.

ZONE: 210

1. Reason for the Job
Self explanatory
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)
TASK 31-32-00-860-010-A	Procedure to Get Access to the SYSTEM REPORT/TEST NAV Page
TASK 34-10-00-860-002-A	ADIRS Start Procedure
TASK 34-10-00-860-005-A	ADIRS Stop Procedure

3. Job Set-up
Subtask 34-14-00-860-061-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002)
(2) Do the Air Data/Inertial Reference System (ADIRS) start procedure (Ref. AMM TASK 34-10-00-860-002).
(3) Get the SYSTEM REPORT/TEST NAV menu page (Ref. AMM TASK 31-32-00-860-010).

Subtask 34-14-00-875-053-A

B. 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
** ON A/C ALL
49VU	NAV PROBES/ADIRU 1/AND AOA 1/26VAC	5FP1	F07
49VU	NAV PROBES/ADIRU1/115VAC	4FP1	F06
** ON A/C NOT FOR ALL
49VU	NAV PROBES/ADIRU3/PWR/SWTG	8FP	F08
** ON A/C ALL
105VU	ADIRS/ADIRU1/28VDC	6FP1	C02
** ON A/C NOT FOR ALL
121VU	ADIRS/ADIRU/2PWR/SHED	10FP	N10
** ON A/C ALL
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
** ON A/C NOT FOR ALL
121VU	ADIRS/2PWR/SHED &/AOA2 MON	10FP	N10

4. Procedure
Subtask 34-14-00-740-069-A ** ON A/C NOT FOR ALL

A. SYSTEM TEST of the Inertial Reference (IR)

NOTE: - This test is for system 1. For systems 2 and 3, use the indications between the parentheses.
The actions and the results of this procedure occur on the Multipurpose Control and Display Unit (MCDU) that you operate.
- It is not necessary to do an Inertial References (IR) alignment procedure before you start the IR SYSTEM TEST. An automatic alignment of the IRs occurs during the IR SYSTEM TEST.
- If the IRs are aligned before you start the IR SYSTEM TEST, a new alignment is necessary after the IR SYSTEM TEST (only if the ADIRUs must be operative, if not set the ADIRUs to off).

ACTION	RESULT
1.On the MCDU, on the SYSTEM REPORT/TEST : NAV menu page, push the line key adjacent to the IR 1(2, 3) indication.	The IR 1(2,3) page comes into view.
2.On the IR 1(2,3) page, push the line key adjacent to the SYSTEM TEST indication.	The IR 1(2,3) SYSTEM TEST page comes into view.
3.On the IR 1(2,3) SYSTEM PAGE page, push the line key adjacent to the START TEST indication.	The TEST IN PROGRESS 95 s indication comes into view. At the end of the test, the TEST OK indication comes into view.
4.Push the line key adjacent to the TEST CLOSE UP indication.	These indications come into view: * TEST CLOSE UP. IR RE-ALIGNMENT * ENTER PPOS WITH AN UNUSED MCDU. (Refer to the NOTE given in Para A).
5.Push the line key adjacent to the RETURN indication.	The test procedure stops.

Subtask 34-14-00-740-069-B ** ON A/C NOT FOR ALL

A. SYSTEM TEST of the Inertial Reference (IR)

ACTION	RESULT
1.On the SYSTEM REPORT/TEST ATA 34 page, push the line key adjacent to the NAV indication.	The SYSTEM REPORT/TEST : NAV menu page comes into view.
2.Push the line key adjacent to the IR 1(2,3) indication.	The IR 1(2,3) page comes into view.
3.On the IR 1(2,3) page, push the line key adjacent to the SYSTEM TEST indication.	The IR 1(2,3) SYSTEM TEST page comes into view.
4.Push the line key adjacent to the START TEST indication.	The TEST IN PROGRESS 40 s indication comes into view. At the end of the test, the TEST OK indication comes into view.
5.Push the line key adjacent to the TEST CLOSE UP indication.	These indications come into view: * TEST CLOSE UP. IR RE-ALIGNMENT * ENTER PPOS WITH THE OTHER MCDU. (Refer to the NOTE given in Para A).
6.Push the line key adjacent to the RETURN indication.	The test procedure stops.

5. Close-up
Subtask 34-14-00-860-062-A

A. Put the Aircraft back to its Initial Configuration
(1) Do the ADIRS stop procedure (Ref. AMM TASK 34-10-00-860-005).
(2) On the MCDU, push the line key adjacent to the RETURN indication until the MAINTENANCE MENU 1/2 page comes into view.
(3) On the MCDU, set the BRT knob to OFF.
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:23:11 UTC