# SDR MEX2003154

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 3, 2003
- Submitted: May 14, 2003
- Operation: Air carrier
- Aircraft: N491SH
- Make and model: Doug MD 83
- Registry model: [Doug MD 83](https://openairdocs.org/model/mcdonnell-douglas-md-83) (OpenAirDocs)
- Aircraft serial: 49150
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Valve
- Part number: 3927141
- Condition: Failed
- Location: Left
- 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/MEX2003154

## Discrepancy

DURING COCKPIT CHECK THE CAPTIAN FOUND PROBLEMS WITH (AUTO LAND) BUTTON AND LEFT PRESSURE REGULATOR VALVE.  THE BUTTON WAS DEFERRED BY MEL CATEGORY C AD THE VALVE WAS REPLACED IAW MM.

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