# SDR BSYA2010051

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 28, 2010
- Submitted: January 6, 2011
- Operation: Air carrier
- Aircraft: [N474AN](https://openairdocs.org/aircraft/N474AN), registered now
- Make and model: Lear 35A
- Registry model: [Lear 35A](https://openairdocs.org/model/gates-learjet-35a) (OpenAirDocs)
- Aircraft serial: 295
- Aircraft time: 16,515 hours, 12,570 cycles
- System (JASC): [3421 · Attitude Gyro and Indicating System](https://openairdocs.org/jasc/3421)
- Part: Vertical Gyro
- Part number: 50112041
- Condition: Failed
- Location: Cockpit
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/BSYA2010051

## Discrepancy

AIRCRAFT DEPARTED LCK WHEN THE V-G MONITOR LIGHT CAME ON, RETURNED TO LCK.  MAINTENANCE REMOVED AND REPLACED VERTICAL GYRO, OPS CHECKED GOOD.

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