# SDR 97UAL900600

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 5, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N7444U
- Make and model: Boeing 727222
- Aircraft serial: 21898
- Engine: Pwa JT8D15
- System (JASC): [2210 · Autopilot System](https://openairdocs.org/jasc/2210)
- Part: Yaw Damper
- Condition: Failed
- Location: E/E Compt
- Component: 2588880902
- Stage of operation: CR
- Nature of condition: F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97UAL900600

## Discrepancy

THREE UNCOMMANDED RUDDER KICKS TO THE LEFT.  APPEARS TO BE BOTH UPPER AND LOWER RUDDERS.  HAPPENED ONLY AT 30,000 FEET.  *S/D*  REPLACED YAW DAMPER COUPLER AND SYSTEM CHECKED OK.

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