# SDR HNAA2023112200453

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 21, 2023
- Submitted: November 24, 2023
- Operation: Air carrier
- Aircraft: [N642AE](https://openairdocs.org/aircraft/N642AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145193
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA2023112200453

## Discrepancy

PRESSURIZATION AUTOMATIC MODE FAILURE AT 13,000 FT CABIN ALT PRESENTED RED  HISTORY: YES MEL   21NOV23  10:06  MDT  C32507  21-12-3 PRESS CONTROL AUTO AND MANUAL.  TROUBLESHOT PER FIM TASK 21-31-00-810-809-A. FOUND RELAY K0412 INOP. R/R'D K0412 RELAY IAW AMM 20-13-02  OPS CHECKS GOOD. CLEAR MEL 21-12-3.

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