# SDR DHL2001717001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 9, 2001
- Submitted: January 9, 2001
- Operation: Air carrier
- Aircraft: [N717DH](https://openairdocs.org/aircraft/N717DH), registered now
- Make and model: Boeing 727-23
- Registry model: [Boeing 727-23](https://openairdocs.org/model/boeing-727-23) (OpenAirDocs)
- Aircraft serial: 19389
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Gyro
- Part number: 25883024
- Part serial: B2675746
- Condition: Unserviceable
- Location: Cockpit
- Stage of operation: TX
- How discovered: C
- Nature of condition: L
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DHL2001717001

## Discrepancy

CAPT HSI FAILED ON TAXI OUT.  REMOVED AND REPLACED NR 2 DIRECTIONAL GYRO PER M/M 34-21-21,SYS OPS CHK GOOD

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