# SDR YENA2025121001192

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 9, 2025
- Submitted: December 10, 2025
- Operation: Air carrier
- Aircraft: [N2156J](https://openairdocs.org/aircraft/N2156J), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 11342
- Aircraft time: 9,921 hours, 1,814 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Decoder/Encoder
- Part number: Z043H0100110
- Part serial: 043H01053290
- Condition: Failed
- Location: Zone 900
- Part time: 9,935 hours, 1,817 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA2025121001192

## Discrepancy

FLT 115, JFK-SFO. (ETOPS)  SMOKE LAV DETECTION FAULT ( CABIN INTERCOMMUNICATION DATA SYSTEM (CIDS) 1) CIDS DEU B ); REMOVED AND REPLACED DEU DECODER ENCODER UNIT B (300RH7) IAW AMM 23-73-47.OPS CHK GOOD MDDR CLRD MX-4 UPDATED PLACARD RMVD.

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