# SDR HSYA201212310002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 2012
- Submitted: January 3, 2013
- Operation: Air carrier
- Aircraft: [N904FE](https://openairdocs.org/aircraft/N904FE), registered now
- Make and model: Cessna 208B
- Registry model: [Cessna 208B](https://openairdocs.org/model/cessna-208b) (OpenAirDocs)
- Aircraft serial: C208B0004
- Aircraft time: 10,488 hours, 14,608 cycles
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Condition: Malfunctioned
- 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/HSYA201212310002

## Discrepancy

PILOT REPORTED AN ADC FAILURE, LOSS OF AIRSPEED, ALTIMETER, VERTICAL SPEED, TAS AND OAT DISPLAYS DURING CRUISE.  AIRCRAFT LANDED WITHOUT INCIDENT.  MX TROUBLESHOOT AND INSPECTED ACFT AHRS 1 TAS ALERT IAW STC ICAW A0-01080-05, REV 1 AND REFERENCING FLIGHT-LINE MM A0-00601-05, REV A, PAGE 3-13.  MX RESET GTP-59 AND GDC-74 CONNECTOR PLUGS AND PERFORMED GROUND OPS AND FUNCTIONAL CHECKS AND SELF-TESTS.  ALL CHECKS WERE GOOD.  ACFT RETURNED TO SERVICE - THREE FLIGHTS HAVE BEEN COMPLETED WITH NO FURTHER DEFECTS NOTED.

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