# SDR SIMA202301221002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2023
- Submitted: January 24, 2023
- Operation: Air carrier
- Aircraft: [N260NN](https://openairdocs.org/aircraft/N260NN), 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: 17000699
- Aircraft time: 13,469 hours, 8,689 cycles
- System (JASC): [3444 · Ground Proximity System](https://openairdocs.org/jasc/3444)
- Part: Radar
- Part number: 066011534001
- Condition: Failed
- Location: Altimeter
- 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/SIMA202301221002

## Discrepancy

RECEIVED TERRAIN TOO LOW ALERT AT APPROX. 400' AGL ON TAKEOFF. RADAR ALT 1 READING UNRELIABLE. AT CRUISE RECEIVED LANDING GEAR AURAL WARNING ALERT WHEN POWER WAS REDUCED. RADAR ALT 1 READING UNRELIABLE AGAIN.  PERFORMED QRH PROCEDURE, LANDING GEAR AURAL WARNING CANNOT BE CANCELED.    R & R RADAR ALT 1 IAW AMM 34-31-01 OPS CHECKED GOOD.  ORIG SUBMISSION DATE: 1/22/2023.

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