Loss of the ADM BUS 3 Input Data to the ADIRU 1

TASK 34-11-00-810-806-A
Loss of the ADM BUS 3 Input Data to the ADIRU 1

1. Possible Causes

ADM-R STATIC PRESSURE [19FP4]
ADIRU-1 [1FP1]
wiring of the ADM BUS 3 INPUT bus from R static pressure ADM (19FP4) to the ADIRU1 (1FP1)

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 34-11-00-740-060-A

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

4. Fault Isolation
Subtask 34-11-00-810-055-B

A. If the test gives the maintenance message ADM4 (19FP4)/ADIRU1 (1FP1):

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring of the ADM BUS 3 INPUT bus from R static pressure ADM (19FP4) to the ADIRU1 (1FP1) ASM 341303.

Subtask 34-11-00-740-061-A

B. Do the test given in Para. 3.

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