# SDR CHI1488

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 27, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N239CH](https://openairdocs.org/aircraft/N239CH), registered now
- Make and model: Boeing 234
- Registry model: [Boeing 234](https://openairdocs.org/model/boeing-vertol-234) (OpenAirDocs)
- Aircraft serial: MJ006
- System (JASC): [2211 · Autopilot Computer](https://openairdocs.org/jasc/2211)
- Part: Computer
- Part number: 234VS1007
- Condition: Failed
- Location: Nr 1 Afcs
- Component: Honeywell
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHI1488

## Discrepancy

AT MORNING START-UP DURING THE AFCS CHECK, WHEN THE AFCS WAS TURNED ON, THE ROLL EXTENSIBLE LINK STARTED MOVING ERRATICALLY.  THE PROBLEM WAS ISOLATED TO THE NR 1 AFCS, AT THIS TIME, THE ROLL LINK STARTED MOVING MORE ERRATICALLY UP AND DOWN.  UPON FURTHER TROUBLESHOOTING, FOUND THE PROBLEM WAS IN THE 'AIR SENSING' SIDE OF THE NR 1 AFCS COMPUTER.  THE COMPUTER WAS REPLACED AND OPS CHECKED GOOD.

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