# SDR 2004FA0000925

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 21, 2004
- Submitted: December 21, 2004
- Operation: General aviation
- Aircraft: [N47AK](https://openairdocs.org/aircraft/N47AK), registered now
- Make and model: Dhav DHC2*
- Aircraft serial: 726
- System (JASC): [3417 · Air Data Computer](https://openairdocs.org/jasc/3417)
- Part: Adc
- Part number: 962830A1S8
- Part serial: 097
- Condition: Malfunctioned
- Location: Cockpit
- 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/2004FA0000925

## Discrepancy

DURING GROUND FUNTIONAL TEST OF THE INITIAL INSTALLATION OF AIR DATA COMPUTER (ADC) INSTALLED AS PART OF THE CHELTON FLIGHT SYSTEMS EFIS-SV SYSTEM UNDER STC SA02203AK, ENCOUNTERED 100FT ALTITUDE DRIFT WITHIN 5 MINUTES AFTER BAROMETRIC PRESSURE HAD BEEN SET.

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