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

TASK 34-11-00-810-804-A
Loss of the ADM BUS 1 Input Data to the ADIRU 1

1. Possible Causes

ADM-L TOTAL PRESSURE [19FP1]
ADIRU-1 [1FP1]
wiring of the ADM BUS 1 INPUT bus from the L total pressure ADM (19FP1) to the ADIRU 1 (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 34-11-00-740-056-A

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

4. Fault Isolation
Subtask 34-11-00-810-053-B

A. If the test gives the maintenance message ADM1 (19FP1)/ADIRU1 (1FP1):

(1) If the fault continues:

(a) If the fault continues:

do a check and repair the wiring of the ADM BUS 1 INPUT bus from the L total pressure ADM (19FP1) to the ADIRU 1 (1FP1) ASM 341303.

Subtask 34-11-00-740-057-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:32:13 UTC