Loss of the IR 3 BUS 2 Output Identified by the EIS 2

TASK 34-14-00-810-864-A
Loss of the IR 3 BUS 2 Output Identified by the EIS 2

1. Possible Causes

ADIRU-3 [1FP3]
wiring of the INERTIAL REFERENCE OUTPUT BUS 2 bus from the ADIRU 3 (1FP3) to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-60-00-740-002	Perform Electronic Instrument System (EIS) Input Test
AMM 31-60-00-740-007	GROUND SCANNING Test of the DMC
AMM 34-12-34-000-001	Removal of the ADIRU
AMM 34-12-34-400-001	Installation of the ADIRU
ASM 341401

3. Fault Confirmation
Subtask 34-14-00-740-154-A ** ON A/C NOT FOR ALL

A. Test
Do the EIS input test (system 2) AMM 31-60-00-740-002.

Subtask 34-14-00-740-154-B ** ON A/C NOT FOR ALL

A. Test
Do the Ground Scanning Test of the DMC (system 2) AMM 31-60-00-740-007.

4. Fault Isolation
Subtask 34-14-00-810-113-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message DMC2 : NO IRS3 DATA:

(1) If the fault continues:

do a check and repair the wiring of the INERTIAL REFERENCE OUTPUT BUS 2 bus from the ADIRU 3 (1FP3) to the first terminal block ASM 341401.

Subtask 34-14-00-810-113-B ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message ADIRU3(1FP3)BUSX IR/DMC2(1WT2)

(1) If the fault continues:

do a check and repair the wiring of the INERTIAL REFERENCE OUTPUT BUS 2 bus from the ADIRU 3 (1FP3) to the first terminal block ASM 341401.

Subtask 34-14-00-740-155-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:32:47 UTC