# SDR SIMA20261031002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 31, 2026
- Submitted: November 4, 2026
- Operation: Air carrier
- Aircraft: [N267NN](https://openairdocs.org/aircraft/N267NN), 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: 17000771
- Aircraft time: 20,772 hours, 14,037 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Mau
- Condition: Failed
- Location: Nr 3 A
- 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/SIMA20261031002

## Discrepancy

AVNX MAU 3A FAIL WHILE CRUISING AT FL340. FOLLOWED QRH PROCEDURE. EMERGENCY DECLARED. RESET AIRCRAFT AND PERFORMED RESET TEST IAW FIM TASK 45-45-00-810-852-A, FOUND CONDITION TO BE TRANSITORY. NO FURTHER DISCREPANCY NOTED.

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