# SDR DALA2021011300206

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 11, 2021
- Submitted: January 13, 2021
- Operation: Air carrier
- Aircraft: [N315DN](https://openairdocs.org/aircraft/N315DN), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 7436
- Aircraft time: 11,137 hours, 5,547 cycles
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Computer
- Condition: Failed
- Location: Nr 2 Mmr
- Stage of operation: DE
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2021011300206

## Discrepancy

ON DESCENT TO ATL, TOTAL FAILURE, FLIGHT PLAN DUMPED.  UNABLE TO RELOAD ANYTHING, NO QRH PROCEDURE.  PERFORMED RAW DATA ILS APPROACH TO ATL.  CORRECTIVE ACITON: REMOVED AND REPLACED MMR2, PER A321 AMM 34-36.  OPERATIONS CHECKS GOOD LAND CAT III TEST OK.

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