Loss of the ADR 1 BUS 3 Output Identified by the ECAM 1

TASK 34-13-00-810-828-A
Loss of the ADR 1 BUS 3 Output Identified by the ECAM 1

1. Possible Causes

ADIRU-1 [1FP1]
wiring of the ADR OUTPUT BUS 3 bus from the ADIRU 1 (1FP1) to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-50-00-710-001	Ground Scanning of the Central Warning System
AMM 34-12-34-000-001	Removal of the ADIRU
AMM 34-12-34-400-001	Installation of the ADIRU
ASM 341301

3. Fault Confirmation
Subtask 34-13-00-710-074-A

A. Test
Do the operational test of the central warning systems (system 1) AMM 31-50-00-710-001.

4. Fault Isolation
Subtask 34-13-00-810-077-A

A. If the test gives the maintenance message FWC1 : NO DATA FROM ADC1:

(1) If the fault continues:

do a check and repair the wiring of the ADR OUTPUT BUS 3 bus from the ADIRU 1 (1FP1) to the first terminal block, ASM 341301.

Subtask 34-13-00-710-075-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:32:22 UTC