# SDR 2005FA0000437

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 16, 2004
- Submitted: March 28, 2005
- Operation: General aviation
- Aircraft: [N1999U](https://openairdocs.org/aircraft/N1999U), registered now
- Make and model: Cessna A185E
- Registry model: [Cessna A185E](https://openairdocs.org/model/cessna-a185e) (OpenAirDocs)
- Aircraft serial: 18501768
- Engine: Cont IO520*
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: 962830A1S8
- Part serial: 058
- Condition: Malfunctioned
- Location: Cockpit
- Part time: 563 hours
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2005FA0000437

## Discrepancy

ADC PROVIDING ERRONEOUS HEADING AND ALTITUDE READINGS.  ADC INSTALLED AS PART OF FLIGHT SYSTEM EFIS-SV SYSTEM.  UNDER STC NR SA02203AK.  (K)

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