# SDR COEA2017010901912

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 9, 2017
- Submitted: January 11, 2017
- 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
- Aircraft time: 36,485 hours, 43,062 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: 7000700942
- Part serial: 86081696
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/COEA2017010901912

## Discrepancy

FLIGHT 7826 ENROUTE TO FCA/AIR TURNBACK. ON CLIMB OUT, THE NR 1 VERTICAL SPEED INDICATOR AND NR 1 AIRSPEED INDICATOR FLAGGED. CREW ELECTED TO RETURN TO FCA, NO EMERGENCY WAS DECLARED. LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE NR 1 AIR DATA COMPUTER. ALL OPS CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.

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