# SDR 29GA2013122000001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 18, 2013
- Submitted: December 20, 2013
- Operation: Air carrier
- Aircraft: N350AG
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340450
- Aircraft time: 29,007 hours, 32,589 cycles
- System (JASC): [2731 · Elevator Tab Control System](https://openairdocs.org/jasc/2731)
- Part: Potentiometer
- Part number: D97439
- Part serial: 91J143499
- Condition: Failed
- Location: Elevator Trim
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/29GA2013122000001

## Discrepancy

IN LEVEL FLIGHT, AT 6,000 FT AND 185 KIAS, AIRCRAFT EXHIBITED UNCOMMANDED PITCH DOWN OF 2 DEGREES, FOLLOWED BY UNCOMMANDED PITCH UP OF APPROXIMATELY 2 DEGREES, BELOW 185 KIAS THIS MOTION CEASED.  REPLACED LT ELEVATOR TRIM ACTUATOR COMPLIED WITH FUNCTIONAL AND RIG CHECK NO DEFECTS FOUND.

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