# SDR COEA0802912

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 11, 2008
- Submitted: August 20, 2008
- Operation: Air carrier
- Aircraft: [N912FX](https://openairdocs.org/aircraft/N912FX), registered now
- Make and model: Aerosp ATR 42-300
- Registry model: [Aerosp ATR 42-300](https://openairdocs.org/model/aerospatiale-aeritalia-atr-42-300) (OpenAirDocs)
- Aircraft serial: 047
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: 7000700942
- Part serial: 89013080
- Condition: Intermittent
- Location: Nr 1
- 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/COEA0802912

## Discrepancy

OVER FLY KTN & SIT:   FLT 7202 SEA-KTN-SIT-JNU.  EN ROUTE TO KTN FROM SEA THE NR 1 AIR DATA COMPUTER (ADC) STARTED TO INTERMITTENTLY FAIL.  SINCE THE NR 2 ADC AND STANDBY SYSTEM WERE OPERATING NORMALLY, A DECISION TO BYPASS KTN AND SIT SO MAINTENANCE COULD BE ACCOMPLISHED WAS MADE.  REMOVED AND REPLACED NR 1 ADC.  (S)

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