# SDR MEX2003161

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 6, 2003
- Submitted: May 23, 2003
- Operation: Air carrier
- Aircraft: XASWW
- Make and model: Doug MD 83
- Registry model: [Doug MD 83](https://openairdocs.org/model/mcdonnell-douglas-md-83) (OpenAirDocs)
- Aircraft serial: 49848
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Computer
- Part number: 4034241974
- Condition: Failed
- 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/MEX2003161

## Discrepancy

THE DIGITAL FLIGHT GUIDANCE COMPUTER DFGC FAILED DUE TO THE MACH SPEED INDICATOR DOES NOT APPEAR AND ALTITUDE HOLD INDICATOR WAS AFFECTED.  THE DFGC WAS DEFERRED BY MEL 22-15.  DURING OVERNIGHT SERVICE THE DFGC WAS REPLACED IAW MM 22-01-01 AND WIRING WAS VERIFIED IAW WDM 22-16-11, TEST CORRECT.

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