Failure of the Input Refresh Rate or Transmission Error from EIU 1 to ADR 3

TASK 34-13-81-810-895-A
Failure of the Input Refresh Rate or Transmission Error from EIU 1 to ADR 3

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-12-34-000-001	Removal of the ADIRU
AMM 34-12-34-400-001	Installation of the ADIRU
ASM 341305
AMM 73-25-34-000-802	Removal of the Engine Interface Unit (EIU)
AMM 73-25-34-400-802	Installation of the Engine Interface Unit (EIU)

3. Fault Confirmation
Subtask 34-13-81-740-211-A ** ON A/C NOT FOR ALL

A. Test
Not applicable, you cannot confirm this fault on the ground.

4. Fault Isolation
Subtask 34-13-81-810-147-A ** ON A/C NOT FOR ALL

A. Replace the EIU-1 [1KS1] AMM 73-25-34-000-802 and AMM 73-25-34-400-802.
(1) After the subsequent flight, if the fault continues:

do a check for continuity of the aircraft wiring from the EIU 1 (1KS1) to the ADIRU 3 (1FP3):
pins AB/5H, 5K to pins AA/13J, 13K for the EIU-1 BUS B ARINC 429 O/P bus ASM 341305.

(a) If there is no continuity:

(b) If there is continuity:

[Rev.8 from Aug 2018] 2026.04.04 04:32:41 UTC