# SDR DXTA2024030711122

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 5, 2024
- Submitted: March 7, 2024
- Operation: Air carrier
- Aircraft: [N620QS](https://openairdocs.org/aircraft/N620QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0162
- Aircraft time: 4,981 hours, 3,236 cycles
- System (JASC): [2740 · Stabilizer Control System](https://openairdocs.org/jasc/2740)
- Part: Switch
- Part number: 99142912
- Condition: Failed
- Location: Stab Disconnect
- Stage of operation: CL
- How discovered: O
- Nature of condition: F, J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2024030711122

## Discrepancy

SHORTLY AFTER TAKEOFF, PRI STAB TRIM FAIL AND AP FAIL CAS MESSAGES ILLUMINATED, THEN WE EXPERIENCED A NOSE-UP TRIM RUNAWAY, COUPLED WITH A TRIM SW FAULT L CAS MESSAGE. AIRPLANE WAS BARELY CONTROLLABLE WITH TWO PILOTS ON THE CONTROLS. RETURNED FOR EMERGENCY LANDING.  REMOVED AND REPLACED THE L/R AUTOPILOT DISCONNECT SWITCHES IAW CE680A AMM 22M 10-50, OPERATIONAL CHECKS ARE GOOD AT THIS TIME. NO FURTHER DEFECTS NOTED.

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