# SDR AALA202512229285

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 19, 2025
- Submitted: December 22, 2025
- Operation: Air carrier
- Aircraft: [N186US](https://openairdocs.org/aircraft/N186US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1701
- Aircraft time: 76,279 hours, 29,782 cycles
- System (JASC): [2560 · Emergency Equipment](https://openairdocs.org/jasc/2560)
- Part: Deu
- Part number: Z040H000820A
- Part serial: 040H00008933
- Condition: Fault Message
- Location: Zone 200
- Part time: 72,710 hours, 27,361 cycles
- Stage of operation: NR
- 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/AALA202512229285

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: CIDS CAUTION LIGHT AND EVACUATION LIGHTS ON CIDS PANEL ARE ILLUMINATED. MAINTENANCE FOUND FAULTED DEU-B 300RH01, REPLACED DEU-B 300RH01 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 23-73-47.

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