Loss of the Data from the ADIRUs to the AFS

TASK 22-66-00-810-835-A
Loss of the Data from the ADIRUs to the AFS

1. Possible Causes

FAC-1 [1CC1]
wiring of the ADC SW and ATT SW discretes (from the FAC 1 (1CC1) to the first terminal block)
FAC-2 [1CC2]
wiring of the ADC SW and ATT SW discretes (from the FAC 2 (1CC2) to the first terminal block)
FMGC-1 [1CA1]
wiring of the ADC 3 SW and ATT 3 SW discretes (from the FMGC 1 (1CA1) to the first terminal block)
FMGC-2 [1CA2]
wiring of the ADC SW and ATT SW discretes (from the FMGC 2 (1CA2) to the first terminal block)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 22-66-34-000-002	Removal of the FAC
AMM 22-66-34-400-002	Installation of the FAC
ASM 226801
AMM 22-83-34-000-001	Removal of the FMGC
AMM 22-83-34-400-001	Installation of the FMGC
ASM 228504
AMM 22-97-00-710-001	Operational Test of the LAND CAT III Capability

3. Fault Confirmation
Subtask 22-66-00-710-190-A

A. Test
Do the operational test of the LAND CAT III capability AMM 22-97-00-710-001.

4. Fault Isolation
Subtask 22-66-00-810-085-A

A. If the test gives the maintenance message AFS : CHK ADIRU 1/2/3 (ISSUED BY : FAC 1):

(1) If the fault continues:

do a check and repair the wiring of the ADC SW and ATT SW discretes (from the FAC 1 (1CC1) to the first terminal block) ASM 226801.

Subtask 22-66-00-810-146-A

B. If the test gives the maintenance message AFS : CHK ADIRU 1/2/3 (ISSUED BY : FAC 2):

(1) If the fault continues:

do a check and repair the wiring of the ADC SW and ATT SW discretes (from the FAC 2 (1CC2) to the first terminal block) ASM 226801.

Subtask 22-66-00-810-147-A

C. If the test gives the maintenance message AFS : CHK ADIRU 1/2/3 (ISSUED BY : FMGC 1):

(1) If the fault continues:

do a check and repair the wiring of the ADC 3 SW and ATT 3 SW discretes (from the FMGC 1 (1CA1) to the first terminal block) ASM 228504.

Subtask 22-66-00-810-148-A

D. If the test gives the maintenance message AFS : CHK ADIRU 1/2/3 (ISSUED BY : FMGC 2):

(1) If the fault continues:

do a check and repair the wiring of the ADC SW and ATT SW discretes (from the FMGC 2 (1CA2) to the first terminal block) ASM 228504.

Subtask 22-66-00-710-191-A

E. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:25:18 UTC