Nuisance Warning Shown on the Post Flight Report (PFR)

TASK 30-31-00-810-873-A
Nuisance Warning Shown on the Post Flight Report (PFR)

1. Possible Causes

WARNING MALFUNCTION - NO FURTHER ACTION REQUIRED
ADIRU-3 [1FP3]
ADIRU-1 [1FP1]

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 341302

3. Fault Confirmation
Subtask 30-31-00-710-187-A ** ON A/C NOT FOR ALL

A. Test
Not applicable.

4. Fault Isolation
Subtask 30-31-00-810-128-A ** ON A/C NOT FOR ALL

A. If the PFR gives the ECAM warning messages that follow:

NOTE: No trouble shooting is necessary if the fault occurred on on a runway with snow or fluid contamination.

NOTE: If the radio-altitude label and the No Computed Data (NCD) come on intermittently during the taxiing on runways with snow or fluid contamination, the FWC computes an in-flight phase although the aircraft is still on the ground. Thus the FWC removes the inhibition of the ECAM warnings.

* ANTI ICE F/O TAT
without the CFDS Fault message (CLASS 1)
* GND TAT SENSOR 11FP1(2),
or/and
without the CFDS Fault message(s) related to
* PHC 6DA1(2, 3) or the TAT probe 11FP1(2),
or/and
without crew observation
* PHC 6DA1(2, 3) or TAT probe 11FP1(2) during the flight related to the PFR messages (ECAM warnings)
WARNING MALFUNCTION - NO FURTHER ACTION REQUIRED .
(1) If the fault continues:
(a) Disconnect connector A from PHC1 and remove ADIRUs 1 and 3.
(b) Do a check for continuity and for short circuit of the TAT signal wiring ASM 341302 between:

Pin A/<A of PHC1 and pin AA/4F of ADIRU1
Pin AA/4F of ADIRU3 and the first branch point.

1 If there is no continuity:

Repair the wiring.
Install ADIRU1 and ADIRU3.

2 If there is continuity:

Install ADIRU1.
Replace ADIRU-3 [1FP3] , AMM 34-12-34-000-001 and AMM 34-12-34-400-001.

a If the fault continues:

Replace ADIRU-1 [1FP1] , AMM 34-12-34-000-001 and AMM 34-12-34-400-001.

[Rev.8 from Aug 2018] 2026.04.04 04:29:39 UTC