# SDR GTIA020730

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 2, 2002
- Submitted: August 29, 2002
- Operation: Air carrier
- Aircraft: N806NK
- Make and model: Doug DC-9-81(MD-81)
- Registry model: [Doug DC-9-81(MD-81)](https://openairdocs.org/model/mcdonnell-douglas-dc-9-81-md-81) (OpenAirDocs)
- Aircraft serial: 48051
- System (JASC): [3460 · Flight Management Computing Hardware System](https://openairdocs.org/jasc/3460)
- Part: Computer
- Part number: 4034241971
- Part serial: 81100375
- Condition: Malfunctioned
- Location: Cockpit
- Stage of operation: CR
- How discovered: O
- Nature of condition: F, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/GTIA020730

## Discrepancy

FLT 1453 - ORD - AUTO PILOT WILL NOT ENGAGE ON NR 1 OR NR 2 DFGC.  FOUND A/P HEAR BEAT FAILS ON BOTH NR 1 AND NR 2 DFGC.  REMOVED AND REPLACED NR 1 AND NR 2 DFGC.  OPS CHECKED GOOD PER MD80 MM 22-01-05.  NO OTHER DISCREPANCIES NOTED.  (M)

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