Loss of the ADM BUS 2 Input Data to the ADIRU 3

TASK 34-11-00-810-811-A
Loss of the ADM BUS 2 Input Data to the ADIRU 3

1. Possible Causes

ADM-STBY STATIC PRESSURE [19FP8]
ADIRU-3 [1FP3]
wiring of the ADM BUS 2 INPUT bus from the standby static pressure ADM (19FP8) to the ADIRU 3 (1FP3)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-11-17-000-001	Removal of the Air Data Module
AMM 34-11-17-400-001	Installation of the Air Data Module
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
ASM 341303

3. Fault Confirmation
Subtask 34-11-00-740-070-A

A. Test
Do the Interface test of the ADR (system 3) AMM 34-13-00-740-002.

4. Fault Isolation
Subtask 34-11-00-810-060-B

A. If the test gives the maintenance message ADM8 (19FP8)/ ADIRU3 (1FP3):

replace the ADM-STBY STATIC PRESSURE [19FP8] AMM 34-11-17-000-001 and AMM 34-11-17-400-001.

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring of the ADM BUS 2 INPUT bus from the standby static pressure ADM (19FP8) to the ADIRU 3 (1FP3) ASM 341303.

Subtask 34-11-00-740-071-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:32:14 UTC