Installation of the ADIRU

TASK 34-12-34-400-001-A
Installation of the ADIRU

ZONE: 120
ZONE: 127
ZONE: 128
FIN: 1FP1
FIN: 1FP2
FIN: 1FP3

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
120	AVIONICS COMPARTMENT
127	REAR AVIONIC COMPARTMENT
128	REAR AVIONIC COMPARTMENT
824
FOR [1FP1] (ADIRU-1)
822

C. Referenced Information

REFERENCE	DESIGNATION
TASK 22-97-00-710-001-A	Operational Test of the LAND CAT III Capability
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 34-12-34-610-801-A	Uploading of Software to the ADIRUs
TASK 34-12-34-610-801-B	Uploading of Software to the ADIRUs
TASK 34-13-00-740-003-A	SYSTEM TEST of the ADR
TASK 34-14-00-740-004-A	SYSTEM TEST of the Inertial Reference (IR)
TASK 52-41-00-410-002-A	Close the Avionics Compartment Doors after Access
Air Data/Inertial Reference Unit (ADIRU)

3. Job Set-up
Subtask 34-12-34-860-050-A

A. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position at the access door 824.
(2) Make sure that the access door 824 is open.

Subtask 34-12-34-010-051-A

B. Get Access
(1) FOR [1FP1] (ADIRU-1)
(a) Make sure that the access platform is in position at the access door 822.
(b) Make sure that the access door 822 is open.
(c) Make sure that the protective cover is removed from the battery power center 105VU.

Subtask 34-12-34-865-051-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 1FP1 (ADIRU1)
49VU	NAV PROBES/ADIRU 1/AND AOA 1/26VAC	5FP1	F07
49VU	NAV PROBES/ADIRU1/115VAC	4FP1	F06
105VU	ADIRS/ADIRU1/28VDC	6FP1	C02
** ON A/C NOT FOR ALL
FOR FIN: 1FP2 (ADIRU2)
121VU	ADIRS/ADIRU/2PWR/SHED	10FP	N10
** ON A/C ALL
121VU	ADIRS/ADIRU/2/26VAC AND AOA	5FP2	N08
121VU	ADIRS/ADIRU/2/115VAC	4FP2	N06
121VU	ADIRS/ADIRU/2/28VDC	6FP2	N04
** ON A/C NOT FOR ALL
121VU	ADIRS/2PWR/SHED &/AOA2 MON	10FP	N10
** ON A/C NOT FOR ALL
FOR FIN: 1FP3 (ADIRU3)
49VU	NAV PROBES/ADIRU3/PWR/SWTG	8FP	F09
** ON A/C NOT FOR ALL
49VU	NAV PROBES/ADIRU3/PWR/SWTG	8FP	F08
** ON A/C ALL
121VU	ADIRS/ADIRU/3PWR/SWTG	9FP	N09
121VU	ADIRS/ADIRU/3/26VAC AND AOA	5FP3	N07
121VU	ADIRS/ADIRU/3/115VAC	4FP3	N05
121VU	ADIRS/ADIRU/3/28VDC	6FP3	N03

4. Procedure
Subtask 34-12-34-420-050-A

A. Installation of the ADIRU (1FP1, 1FP2, 1FP3)
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that all the ventilation holes of the rack (3) are not clogged with unwanted material (paper, masking tape, plugs, etc.).
(4) Remove the blanking caps from the electrical connectors (1).
(5) Make sure that the electrical connectors (1) are clean and in the correct condition.
(6) Push the ADIRU (6) on its rack (3) to connect the electrical connectors (1).

NOTE: Make sure that the ADIRU (6) engages correctly in the centering pins (2).

(7) Engage the nuts (4) on the lugs (5) and tighten.

Subtask 34-12-34-865-052-A

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 1FP1 (ADIRU1)
49VU	NAV PROBES/ADIRU 1/AND AOA 1/26VAC	5FP1	F07
49VU	NAV PROBES/ADIRU1/115VAC	4FP1	F06
105VU	ADIRS/ADIRU1/28VDC	6FP1	C02
** ON A/C NOT FOR ALL
FOR FIN: 1FP2 (ADIRU2)
121VU	ADIRS/ADIRU/2PWR/SHED	10FP	N10
** ON A/C ALL
121VU	ADIRS/ADIRU/2/26VAC AND AOA	5FP2	N08
121VU	ADIRS/ADIRU/2/115VAC	4FP2	N06
121VU	ADIRS/ADIRU/2/28VDC	6FP2	N04
** ON A/C NOT FOR ALL
121VU	ADIRS/2PWR/SHED &/AOA2 MON	10FP	N10
** ON A/C NOT FOR ALL
FOR FIN: 1FP3 (ADIRU3)
49VU	NAV PROBES/ADIRU3/PWR/SWTG	8FP	F09
** ON A/C NOT FOR ALL
49VU	NAV PROBES/ADIRU3/PWR/SWTG	8FP	F08
** ON A/C ALL
121VU	ADIRS/ADIRU/3PWR/SWTG	9FP	N09
121VU	ADIRS/ADIRU/3/26VAC AND AOA	5FP3	N07
121VU	ADIRS/ADIRU/3/115VAC	4FP3	N05
121VU	ADIRS/ADIRU/3/28VDC	6FP3	N03

Subtask 34-12-34-860-066-A

C. Do the ADIRS start procedure (Ref. AMM TASK 34-10-00-860-002).
(1) If one of the ECAM warnings that follow comes into view:

NAV IR 1 FAULT
NAV IR 2 FAULT
NAV IR 3 FAULT.

(a) Ignore the ECAM warnings because the steps you follow to load the applicable software remove the ECAM warnings.

NOTE: The ECAM warnings NAV IR 1 FAULT or NAV IR 2 FAULT or NAV IR 3 FAULT come into view if the ADIRU part number is in format HG2030BEXX. This is because the installed ADIRU does not agree with the minimum applicable standard.

Subtask 34-12-34-740-056-A ** ON A/C NOT FOR ALL

D. LRU Identification
(1) Get access to the SYSTEM REPORT/TEST NAV page (Ref. AMM TASK 31-32-00-860-010).

NOTE: The actions and results of this procedure occur on the MCDU used.

NOTE: It is not possible to do a full LRU identification immediately, approximately three minutes are necessary after the power-up.

ACTION	RESULT
1.Push the line key adjacent to the NAV indication.	The NAV page comes into view.
2.Push the line key adjacent to the ADR1(2, 3) indication.	The ADR1(2, 3) page comes into view.
3.Push the line key adjacent to the LRU IDENT indication.	The LRU IDENTIFICATION page comes into view.

(a) On the LRU IDENTIFICATION page, do a check of the ADIRU part number:

If the ADIRU part number is of format HG2030BEXX, go to Step (b).
If the ADIRU part number is not of format HG2030BEXX, make sure that the installed ADIRU1(2, 3) agrees with the airline configuration management document and go to Para. "BITE test".

(b) On the LRU IDENTIFICATION page, make sure that:

The P/N-SWAPP (OP SW) shown is correct.
The P/N-SWA/C (OPC1 table) shown is correct.
The P/N-SWMAG (OPC2 table) shown is correct.

(c) If one of these software components is not correct, remove the computer and send it to the shop.
(2) Put the aircraft back to its initial configuration:

On the MCDU, push the line key adjacent to the RETURN indication until the MAINTENANCE MENU page 1/2 comes into view.
On the MCDU, fully decrease the brightness of the MCDU screen (display off).

Subtask 34-12-34-740-056-C ** ON A/C NOT FOR ALL

D. LRU Identification
(1) Get access to the SYSTEM REPORT/TEST NAV page (Ref. AMM TASK 31-32-00-860-010).

NOTE: The actions and results of this procedure occur on the MCDU used.

NOTE: It is not possible to do a full LRU identification immediately, approximately three minutes are necessary after the power-up.

ACTION	RESULT
1.Push the line key adjacent to the NAV indication.	The NAV page comes into view.
2.Push the line key adjacent to the ADR1(2, 3) indication.	The ADR1(2, 3) page comes into view.
3.Push the line key adjacent to the LRU IDENT indication.	The LRU IDENTIFICATION page comes into view.

(a) On the LRU IDENTIFICATION page, do a check of the part number of the ADIRU:

If the ADIRU part number is of format HG2030BEXX, go to Step (b).
If the ADIRU part number is not of format HG2030BEXX, make sure that the installed ADIRU1(2, 3) agrees with the airline configuration management document and go to Para. "BITE test".

(b) On the LRU IDENTIFICATION page, make sure that:

The P/N-SWAPP (OP SW) shown is correct.
The P/N-SWA/C (OPC1 table) shown is correct.
The P/N-SWMAG (OPC2 table) shown is correct.

(c) If one of these software part numbers is not the same as the one read on the disk(s) or in the Operators Aircraft Loadable Software list: upload of the applicable software to the ADIRU (Ref. AMM TASK 34-12-34-610-801).
(2) Put the aircraft back to its initial configuration:

On the MCDU, push the line key adjacent to the RETURN indication until the MAINTENANCE MENU page 1/2 comes into view.
On the MCDU, fully decrease the brightness of the MCDU screen (display off).

Subtask 34-12-34-280-053-A ** ON A/C NOT FOR ALL

E. Check of the ADIRU Software P/N through the AVIONICS CONFIG REPORT Page
(1) On the MCDU MENU page, push the line key adjacent to the CFDS indication: the MAINTENANCE MENU page 1/2 comes into view.
(2) On the MCDU, push the next page function key.
(3) On the MAINTENANCE MENU page 2/2, push the line key adjacent to the AVIONICS CONFIG REPORT indication.
(4) Enter 34 (the applicable ATA number) in the scratchpad.
(5) On the AVIONICS CONFIG REPORT page, push the line key adjacent to the START indication.
(6) On the AVIONICS CONFIG REPORT page, push the line key adjacent to the ATA 341234 ADIRU (1, 2 or 3) indication.
(7) On the AVIONICS CONFIG REPORT/ATA 341234 ADIRU (1, 2 or 3) page, make sure that the correct software (software DB/N1) component is uploaded.
(8) Push the line key adjacent to the RETURN indication until the MAINTENANCE MENU page 1/2 comes into view.

Subtask 34-12-34-740-050-B

F. BITE Test
(1) Do the system test of the ADR (Ref. AMM TASK 34-13-00-740-003).
(2) Do the system test of the IR (Ref. AMM TASK 34-14-00-740-004).
(3) If the airline operates the aircraft in CAT 3 conditions, do the operational test of the LAND CAT III capability (Ref. AMM TASK 22-97-00-710-001).

5. Close-up
Subtask 34-12-34-860-051-A

A. Put the aircraft back to its initial configuration.
(1) On the overhead panel 23VU, release and push the FLT CTL/ELAC1 and FLT CTL/SEC1 pushbutton switches (the OFF legend comes on and goes off).
(2) On the overhead panel 24VU, release and push the FLT CTL/ELAC2, FLT CTL/SEC2 and FLT CTL/SEC3 pushbutton switches (the OFF legend comes on and goes off).
(3) Make sure that the work area is clean and clear of tools and other items.

Subtask 34-12-34-410-050-A

B. Close Access
(1) Close the access door 824 (Ref. AMM TASK 52-41-00-410-002).
(2) FOR [1FP1] (ADIRU-1)
Install the protective cover on the battery power center 105VU and tighten the two screws.
(3) FOR [1FP1] (ADIRU-1)
Close the access door 822.
(4) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 06:46:00 UTC