Failure of the ADIRU Signal to the BCL1 and the BCL2

TASK 24-38-00-810-819-A
Failure of the ADIRU Signal to the BCL1 and the BCL2

1. Possible Causes

ADIRU-1 [1FP1]

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-38-00-710-001	Operational Test of the Battery Charge Limiter (BCL), (with the CFDS)
AMM 34-12-34-000-001	Removal of the ADIRU
AMM 34-12-34-400-001	Installation of the ADIRU
AMM 34-13-00-740-002	INTERFACE TEST of the ADR

3. Fault Confirmation
Subtask 24-38-00-700-052-A

A. Test
Do the operational test of the BCL1 and BCL2 AMM 24-38-00-710-001.
(1) If the test gives the maintenance messages BCL1 : LGCIU/ADIRU1 SIGNAL DISAGREE and BCL2 : LGCIU/ADIRU1 SIGNAL DISAGREE:

do the Interface test of the ADR system (system 1) AMM 34-13-00-740-002.

(a) If the test gives the maintenance message ADIRU1:

do the trouble shooting given in Para. 4.A.

(b) If the test gives another maintenance message:

do the related trouble shooting.

4. Fault Isolation
Subtask 24-38-00-810-068-A

A. If the test confirms the failure:

replace the ADIRU-1 [1FP1] AMM 34-12-34-000-001 and AMM 34-12-34-400-001.

[Rev.8 from Aug 2018] 2026.04.04 04:26:48 UTC