# SDR 2003UALA00687

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2003
- Submitted: September 23, 2003
- Operation: Air carrier
- Aircraft: [N197UA](https://openairdocs.org/aircraft/N197UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 26901
- Aircraft time: 23,751 hours, 2,993 cycles
- Engine: Pwa PW4090
- System (JASC): [7230 · Turbine Engine Compressor Section](https://openairdocs.org/jasc/7230)
- Part: Actuator
- Condition: Failed
- Location: Nr 3 Eng Vsv
- Stage of operation: DE
- How discovered: O
- Nature of condition: Y, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2003UALA00687

## Discrepancy

TOP OF DESCENT, NR 3 ENGINE SHUT DOWN.  THE CAUSE OF THE IFSD WAS THE FAILURE OF THE STATOR VANE ACTUATOR. THE ACTUATOR EXPERIENCED A DUAL CHANNEL TRACK CHECK FAULT AND DID NOT GO TO THE COMMANDED POSITION. THE STATOR VANE ACTUATOR WAS CHANGED AND AIRCRAFT RETURNED TO SERVICE.

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