# SDR AALA20120126DFW01

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 2012
- Submitted: January 31, 2012
- Operation: Air carrier
- Aircraft: N9407R
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 49400
- Aircraft time: 67,267 hours, 33,488 cycles
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Computer
- Condition: Activated
- Location: Flight Guidance
- Stage of operation: CR
- How discovered: O
- Nature of condition: G
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20120126DFW01

## Discrepancy

DFW - CREW REPORTED AUTO PILOT FAILURE, DIGITAL FLIGHT GUIDANCE SYSTEM FAILURE, AND FAULTING VERTICAL GYRO.  FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  REPLACED ONE AND TWO DIGITAL FLIGHT GUIDANCE COMPUTERS.  SYSTEM GROUND CHECK NORMAL OPERATION.

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