# SDR SIMA20201017001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 17, 2020
- Submitted: October 18, 2020
- Operation: Air carrier
- Aircraft: N841AE
- Make and model: Emb EMB-135KL
- Registry model: [EMB EMB-135KL](https://openairdocs.org/model/embraer-emb-135kl) (OpenAirDocs)
- Aircraft serial: 145667
- Aircraft time: 31,745 hours, 31,158 cycles
- System (JASC): [3150 · Central Warning](https://openairdocs.org/jasc/3150)
- Part: Display
- Condition: Unreliable
- Location: Nr 1
- Stage of operation: CL
- 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/SIMA20201017001

## Discrepancy

AFTER TAKE OFF, UNRELIABLE POSITION ON FMS 1.  MFD 1 DID NOT UPDATE.  NON-ALERTED DECLARED EMERGENCY INBOUND TXK FOR NAVIGATION FAILURE.  C/A: PERFORMED ADC SYSTEM OPERATIONS CHECK, IAW AMM 34-15-00.  OPERATIONS CHECK GOOD.  POSITION INDICATION SHOWN ON MFD 1 DURING ADC SYSTEM.  OPERATIONS CHECK.

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