DOC AIRBUS | TSM A320FLoss of the ADR or IR Data
TASK 22-83-00-810-874-A
Loss of the ADR or IR Data
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 22-83-00-710-175-A
Subtask 22-83-00-810-156-A
[Rev.8 from Aug 2018]
2026.04.04 04:25:34 UTC
Loss of the ADR or IR Data
1. Possible Causes
discrepency between ADR/IR parameters
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 34-13-81-810-823-A | Runaway or Drift of One ADR1 Parameter Identified by the ELACs and the SECs |
| TSM TASK 34-13-81-810-824-A | Runaway or Drift of One ADR2 Parameter Identified by the ELACs and the SECs |
| TSM TASK 34-13-81-810-825-A | Runaway or Drift of One ADR3 Parameter Identified by the ELACs and the SECs |
| TSM TASK 34-14-00-810-926-A | Disagree between the FMS and the IRS Positions/Excessive drift |
| AMM 22-91-00-710-001 | Ground Scanning of the AFS |
| AMM 34-13-00-720-009 | Functional Test of the Altitude and Airspeed Data (A/C without RVSM capability on ADIRU 3) |
| AMM 34-13-00-740-002 | INTERFACE TEST of the ADR |
| AMM 34-14-00-740-001 | Interface Test of the IR |
Subtask 22-83-00-710-175-A
A. Test
(1) Do the Ground Scanning of the AFS AMM 22-91-00-710-001 and check ofdiscrepency between ADR/IR parameters .
4. Fault Isolation(1) Do the Ground Scanning of the AFS AMM 22-91-00-710-001 and check of
Subtask 22-83-00-810-156-A
A. If the test gives the maintenance message AFS : ADIRU 1/2/3 DISAGREE:
(b) If the fault continues:
Subtask 22-83-00-810-177-A - do a check of the presence, at the same time, of the message ADIRU RTOK.
- no maintenance action is necessary.
- do the INTERFACE test of the ADR system AMM 34-13-00-740-002
- do the INTERFACE test of the IR system AMM 34-14-00-740-001.
(b) If the fault continues:
- do the functional test of the altitude and airspeed data AMM 34-13-00-720-009.
- do the trouble shooting related to the monitoring of the IR parameters at the end of the flight (Ref. TSM TASK 34-14-00-810-926).
B. If the test does not confirm the fault:
Subtask 22-83-00-710-176-A - read the Post Flight Report (PFR) for maintenance messages related to the ADR with the EFCS source.
- do this trouble shooting procedure: (Ref. TSM TASK 34-13-81-810-823).
- do this trouble shooting procedure: (Ref. TSM TASK 34-13-81-810-824).
- do this trouble shooting procedure: (Ref. TSM TASK 34-13-81-810-825).
C. Do the test given in Para. 3.