# SDR SIMA20260721001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 21, 2026
- Submitted: July 22, 2026
- Operation: Air carrier
- Aircraft: [N329DD](https://openairdocs.org/aircraft/N329DD), registered now
- Make and model: Emb ERJ 170-200 LR
- Registry model: [EMB ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr) (OpenAirDocs)
- Aircraft serial: 17000457
- Aircraft time: 27,567 hours, 19,021 cycles
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Warning Message
- Condition: False Activation
- Stage of operation: CL
- 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/SIMA20260721001

## Discrepancy

AVNX MAU 3A FAIL RIGHT AFTER TAKEOFF. CAUSED MANY OTHER EICAS MESSAGES EMERGENCY DECLARED. C/W FIM TASK 31-42-00-810-812-A AND AMM 27-00-00/200 FLIGHT CONTROL RETURN TO SERVICE NO FAULTS FOUND OK FOR SERVICE

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