# SDR DXTA200500799

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 17, 2005
- Submitted: June 24, 2005
- Operation: Air carrier
- Aircraft: [N909QS](https://openairdocs.org/aircraft/N909QS), registered now
- Make and model: Cessna 750
- Registry model: [Cessna 750](https://openairdocs.org/model/cessna-750) (OpenAirDocs)
- Aircraft serial: 7500009
- Aircraft time: 7,330 hours, 4,786 cycles
- System (JASC): [2720 · Rudder Control System](https://openairdocs.org/jasc/2720)
- Part: Dmu
- Part number: 972260
- Condition: Malfunctioned
- Location: Rudder
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA200500799

## Discrepancy

AT CRUISE ALTITUDE, HEARD CLICK OR SNAP AND FELT ABRUPT JERK OF NOSE TO LT . RUDDER TRIM RAN AWAY WITH 50 PERCENT DEFLECTION AND STOPPED RETRIMMED RUDDER WITH NO FURTHER INCIDENT.  CHECKED RUDDER CABLE TENSIONS AND DMU FOR A PCU FORCE FLIGHT.  CONNECTED DMU AND FOUND NO INDICATIONS OF A FORCE FIGHT ON ANY PCU.  REMOVED DMU AND RESTORED ACFT TO ORIGINAL POSITION CONFIGURATION.  NEED TO LOCATE RUDDER CONTOUR BOARDS TO PERFORM RUDDER CONTROL SYSTEM CHECK.

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