Only the NAV ADR3 FAULT ECAM Warning is shown in the POST FLIGHT REPORT (PFR)

TASK 34-13-81-810-820-A
Only the NAV ADR3 FAULT ECAM Warning is shown in the POST FLIGHT REPORT (PFR)

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-10-00-860-005	ADIRS Stop Procedure
AMM 34-12-12-000-001	Removal of the ADIRS CDU
AMM 34-12-12-400-001	Installation of the ADIRS CDU
AMM 34-12-34-000-001	Removal of the ADIRU
AMM 34-12-34-400-001	Installation of the ADIRU
ASM 341302

3. Fault Confirmation
Subtask 34-13-81-700-053-A

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

4. Fault Isolation
Subtask 34-13-81-810-070-B ** ON A/C NOT FOR ALL

A. If the POST FLIGHT REPORT gives the NAV ADR3 FAULT ECAM warning:

(1) If the pilot pushed the ADR3 pushbutton switch during the flight:

(2) If the pilot did not push the ADR3 pushbutton switch during the flight:

remove the ADIRU-3 [1FP3] AMM 34-12-34-000-001
remove the CDU-ADIRS [2FP] AMM 34-12-12-000-001
do a check for a short to ground on the wiring between the ADIRS CDU (2FP) and the ADIRU3 (1FP3) between pin C/9 of the ADIRS CDU and pin AA/4C of the ADIRU3 ASM 341302.

(a) If there is a short to ground:

(b) If there is no short to ground:

1 If the fault continues:

Subtask 34-13-81-810-070-C ** ON A/C NOT FOR ALL

A. If the POST FLIGHT REPORT gives the NAV ADR3 FAULT ECAM warning:

(1) If the pilot pushed the ADR3 pushbutton switch during the flight:

(2) If the pilot did not push the ADR3 pushbutton switch during the flight:

Remove the ADIRU-3 [1FP3] AMM 34-12-34-000-001
Do a check for a short to ground of the wiring between pin A/A1 of the ADIRS/ADR3 pushbutton switch (26FP3) and pin AA/4C of the ADIRU3 (1FP3) ASM 341302.

(a) If there is a short to ground:

(b) If there is no short to ground:

1 If the fault continues:

5. Close-up
Subtask 34-13-81-860-053-A

A. Do the ADIRS stop procedure AMM 34-10-00-860-005.

[Rev.8 from Aug 2018] 2026.04.04 04:32:35 UTC