Loss of DC Supply of the ADIRU3 During Power Transfer on Ground

TASK 34-14-00-810-971-A
Loss of DC Supply of the ADIRU3 During Power Transfer on Ground

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-30-00-040-001	Do a Charging Cycle of the Battery Connected with the Battery Charge Limiter (BCL) or Replacement of the Battery
ASM 341101

3. Fault Confirmation
Subtask 34-14-00-710-087-A

A. Test
Not applicable, the fault is evident.

4. Fault Isolation
Subtask 34-14-00-810-227-A ** ON A/C NOT FOR ALL

A. If the FAULT annunciator light of the IR3 comes on, on the Control and Display Unit (CDU) during power transfer on ground:

(1) If the battery 1 charge is correct:

(a) If the fault continues:

do a check and repair the wiring between the circuit breaker (6FP3) and the ADIRU3 (1FP3): for pin AC/7 of the ADIRU3 ASM 341101.

Subtask 34-14-00-810-227-B ** ON A/C NOT FOR ALL

A. If the FAULT legend of the IR3 pushbutton switch comes on, on the Mode Selector Unit (MSU) during power transfer on ground:

(1) If the battery 1 charge is correct:

(a) If the fault continues:

Do a check and repair the wiring between the ADIRS/ADIRU/3/28VDC circuit breaker (6FP3) and pin AC/7 of the ADIRU3 (1FP3) ASM 341101.

[Rev.8 from Aug 2018] 2026.04.04 04:32:53 UTC