Loss of the IR 3 BUS 3 Output Identified by the RADAR 1

TASK 34-14-00-810-857-A
Loss of the IR 3 BUS 3 Output Identified by the RADAR 1

1. Possible Causes

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

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 341401
AMM 34-41-00-740-002	BITE Test of the Weather Radar

3. Fault Confirmation
Subtask 34-14-00-740-142-A

A. Test
Do the BITE test of the weather radar (system 1) AMM 34-41-00-740-002.

4. Fault Isolation
Subtask 34-14-00-810-106-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message RADAR 1 NO DATA FROM ADIRU:

(1) If the fault continues:

do a check and repair the wiring of the INERTIAL REFERENCE OUTPUT BUS 3 bus from the ADIRU 3 (1FP3) to the first terminal block: for pins AB/10C, 11C of the ADIRU 3 ASM 341401.

Subtask 34-14-00-810-106-C ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message ADIRU3 (1FP3) IR BUS/WXR1 (1SQ1):

(1) If the fault continues:

do a check and repair the wiring of the INERTIAL REFERENCE OUTPUT BUS 3 bus from the ADIRU 3 (1FP3) to the first terminal block: for pins AB/10C, 11C of the ADIRU 3 ASM 341401.

Subtask 34-14-00-740-143-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:32:46 UTC