# SDR TWAA0008602

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 31, 2000
- Submitted: June 2, 2000
- Operation: Air carrier
- Aircraft: N951U
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49245
- Aircraft time: 50,505 hours, 26,360 cycles
- System (JASC): [3420 · Attitude and Direction Data System](https://openairdocs.org/jasc/3420)
- Part: Gyro
- Part number: 199111C
- Part serial: 45145
- Condition: Failed
- Location: Cockpit Hsi
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/TWAA0008602

## Discrepancy

DURING CRUISE, F/O''S RMI AND CAPT''S HSI BECAME ERRATIC THEREAFTER VG NUMBER 1 FAILED AND WOULD NOT RESET.   REPLACED VG (PN 19911-C1) (S/N 45145) AND DG (P/N 17265-2A) (S/N 55485).  AC03  04-04-00  JFK.

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