# SDR SIMA20180407002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 7, 2018
- Submitted: April 9, 2018
- Operation: Air carrier
- Aircraft: [N918AE](https://openairdocs.org/aircraft/N918AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 14500902
- Aircraft time: 32,578 hours, 27,577 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: 7014700626
- Part serial: 02056279
- Condition: Failed
- Location: Left
- Stage of operation: DE
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA20180407002

## Discrepancy

CAPTAIN`S AIRSPEED UNRELIABLE DURING DESCENT.  LOST 40KTS ACCORDING TO IT THEN A GAIN OF AROUND 60KTS WITH NO THRUST CHANGE. REMOVED AND REPLACED THE NR 1 ADC IAW AMM 34-15-01, OPERATES OK IAW AMM 34-15-00,  PITOT/STATIC LEAK CHECKED OK IAW AMM 34-13-00.

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