# SDR SIMA20251022002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 22, 2025
- Submitted: October 27, 2025
- Operation: Air carrier
- Aircraft: [N770JM](https://openairdocs.org/aircraft/N770JM), registered now
- Make and model: Emb ERJ 170-100 LR
- Registry model: [EMB ERJ 170-100 LR](https://openairdocs.org/model/embraer-erj-170-100-lr) (OpenAirDocs)
- Aircraft serial: 17000025
- Aircraft time: 41,580 hours, 34,057 cycles
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Iru
- Condition: Faulted
- Location: Nr 1
- Stage of operation: AP
- 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/SIMA20251022002

## Discrepancy

IRS 1 FAIL EMERGENCY DECLARED. RAR #1 MICRO IRU IAW ERJ AMM 34-26-01 OPS CHECK GOOD

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