# SDR DALA2020111003652

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 6, 2020
- Submitted: November 10, 2020
- Operation: Air carrier
- Aircraft: [N357DN](https://openairdocs.org/aircraft/N357DN), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 8339
- Aircraft time: 5,926 hours, 2,600 cycles
- System (JASC): [2200 · Auto Flight System](https://openairdocs.org/jasc/2200)
- Part: Adiru
- Condition: Faulted
- Location: Nr 3
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2020111003652

## Discrepancy

MISC/DE.  CREW RECEIVED AN NAV ADR DISAGREE, AP AND A/T KICKED OFF, AIRCRAFT REVERTED TO ALTERNATE LAW PASSING FL240 ON CLIMB OUT.  ADR 3 WAS ALREADY ON MEL.  DECLARED EMERGENCY.  CORRECTIVE ACTION: REPLACED ADIRU NR 3.

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