# SDR SIMA20250722001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 2025
- Submitted: July 23, 2025
- Operation: Air carrier
- Aircraft: [N788CJ](https://openairdocs.org/aircraft/N788CJ), registered now
- Make and model: Emb ERJ 170-100 SE
- Registry model: [EMB ERJ 170-100 SE](https://openairdocs.org/model/embraer-erj-170-100-se) (OpenAirDocs)
- Aircraft serial: 17000051
- Aircraft time: 50,591 hours, 32,454 cycles
- System (JASC): [3130 · Data Recorders (Flight/Maintenance)](https://openairdocs.org/jasc/3130)
- Part: Mau
- Condition: Failed
- Location: Nr 2a
- Stage of operation: CR
- 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/SIMA20250722001

## Discrepancy

AVNX MAU FAIL 2A FAIL, FMS 1 FAIL EICAS MESSAGES IN CRUISE. EMERGENCY DECLARED.   REMOVED AND REPLACED MAU 2 POWER SUPPLY 2 IAW AMM CH 31-41-02 OPS CHECK GOOD..

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