Only the NAV ADR1 FAULT ECAM Warning is shown in the POST FLIGHT REPORT (PFR)

TASK 34-13-81-810-817-A
Only the NAV ADR1 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 34-12-12-000-001	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 34-13-81-700-051-A

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

4. Fault Isolation
Subtask 34-13-81-810-066-A ** ON A/C NOT FOR ALL

A. If the POST FLIGHT REPORT gives the NAV ADR1 FAULT ECAM warning:

(1) If the pilot pushed the ADR1 pushbutton switch during the flight:

(2) If the pilot did not push the ADR1 pushbutton switch during the flight:

remove the ADIRU-1 [1FP1] 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 ADIRU1 (1FP1) between pin A/9 of the ADIRS CDU and pin AA/4C of the ADIRU1 ASM 341302.

(a) If there is a short to ground:

(b) If there is no short to ground:

1 If the fault continues:

Subtask 34-13-81-810-066-B ** ON A/C NOT FOR ALL