DOC AIRBUS | TSM A320FSelection of the Mode for the IR3 not Possible
TASK 34-14-00-810-925-A
Selection of the Mode for the IR3 not Possible
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 34-14-00-740-261-A 4. Fault Isolation
Subtask 34-14-00-810-179-B ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:32:50 UTC
Selection of the Mode for the IR3 not Possible
1. Possible Causes
- ADIRU-3 [1FP3]
wiring between the ADIRU3 and the ADIRS CDU (2FP) - wiring between the ADIRU3 and the ADIRS MSU
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ASM 341101 | |
| ASM 341103 | |
| AMM 34-12-34-000-001 | Removal of the ADIRU |
| AMM 34-12-34-400-001 | Installation of the ADIRU |
| AMM 34-14-00-740-001 | Interface Test of the IR |
Subtask 34-14-00-740-261-A 4. Fault Isolation
Subtask 34-14-00-810-179-B ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message ADIRS CTLPNL (2FP/221VU)/ ADIRU3 (1FP3):
Subtask 34-14-00-810-179-D ** ON A/C NOT FOR ALL - remove the ADIRU-3 [1FP3] AMM 34-12-34-000-001
- do a check for a ground signal at pins AB/1F, 2F of the rack connector ASM 341101.
- install a new ADIRU3 AMM 34-12-34-400-001.
- do a check and repair the
wiring between the ADIRU3 and the ADIRS CDU (2FP) : pins AB/1D, 2D, 1F, 2F to pins C/3, 4, 12, 13. - install the ADIRU3.
A. If the test gives the maintenance message ADIRS CTLPNL (2FP/221VU)/ ADIRU3 (1FP3):
Subtask 34-14-00-810-179-E ** ON A/C NOT FOR ALL - Remove the ADIRU-3 [1FP3] AMM 34-12-34-000-001
- Do a check for a ground signal at pins AB/1F, 2F of the rack connector ASM 341103.
- Install a new ADIRU3 AMM 34-12-34-400-001.
- do a check and repair the wiring between the ADIRU3 and the ADIRS MSU ASM 341103:
. pin AB/2D to pins 1 and 9 of the ADIRS/OFF/NAV/ATT selector switch (25FP3)
. pin AB/1F to pins 3 and 11 of the ADIRS/OFF/NAV/ATT selector switch (25FP3)
. pin AB/2F to pins 4 and 12 of the ADIRS/OFF/NAV/ATT selector switch (25FP3) - Install the ADIRU3 AMM 34-12-34-400-001.
A. If the test gives the maintenance message ADIRS CONTROL PANEL (2FP/221VU)/ ADIRU3 (1FP3):
Subtask 34-14-00-740-262-A - Remove the ADIRU-3 [1FP3] AMM 34-12-34-000-001
- Do a check for a ground signal at pins AB/1F, 2F of the rack connector ASM 341103.
- Install a new ADIRU3 AMM 34-12-34-400-001.
- do a check and repair the wiring between the ADIRU3 and the ADIRS MSU ASM 341103:
. pin AB/2D to pins 1 and 9 of the ADIRS/OFF/NAV/ATT selector switch (25FP3)
. pin AB/1F to pins 3 and 11 of the ADIRS/OFF/NAV/ATT selector switch (25FP3)
. pin AB/2F to pins 4 and 12 of the ADIRS/OFF/NAV/ATT selector switch (25FP3) - Install the ADIRU3 AMM 34-12-34-400-001.
B. Do the test given in Para. 3.