# SDR DHL97721001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N721DH
- Make and model: Boeing 727228
- Aircraft serial: 19545
- System (JASC): [3422 · Directional Gyro and Indicating System](https://openairdocs.org/jasc/3422)
- Part: Directional Gyro
- Part number: 25883024
- Condition: Malfunctioned
- Location: Nr 2
- Component: 2588381901
- Stage of operation: CR
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DHL97721001

## Discrepancy

NR 2 COMPASS SYSTEM UNUSEABLE WITH DG SELECTED NR 1.  HSI'S WORKS NORMALLY.  F/O'S RMI SPUN 360 DEGREES.  REPLACED NR 2 DIRECTION GYRO.  REPLACED F/O'S RMI INDICATOR.  PERFORMED COMPASS SLAVING TEST.  OPERATIONAL CHECK NORMAL.

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