Failure of the ADIRS CDU

TASK 34-14-00-810-974-A
Failure of the ADIRS CDU

1. Possible Causes

CDU-ADIRS [2FP]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-12-12-000-001	Removal of the ADIRS CDU
AMM 34-12-12-400-001	Installation of the ADIRS CDU
AMM 34-14-00-740-001	Interface Test of the IR

3. Fault Confirmation
Subtask 34-14-00-740-343-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the interface test of the IR (system 1, 2 and 3) AMM 34-14-00-740-001.

4. Fault Isolation
Subtask 34-14-00-810-230-A ** ON A/C NOT FOR ALL

A. If the BITE tests give the maintenance messages
ADIRS CONTROL PANEL (2FP)/ADIRU1(1FP1),
ADIRS CONTROL PANEL (2FP)/ADIRU2(1FP2),
ADIRS CONTROL PANEL (2FP)/ADIRU3(1FP3) and if the STS - CDU FAULT message is shown on the ADIRS CDU (2FP) on the overhead panel 20VU:

replace the CDU-ADIRS [2FP] AMM 34-12-12-000-001 and AMM 34-12-12-400-001

Subtask 34-14-00-740-344-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:32:53 UTC