# SDR SWAA2019012428881

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 22, 2019
- Submitted: January 24, 2019
- Operation: Air carrier
- Aircraft: N7851A
- Make and model: Boeing 737-7Q8
- Registry model: [Boeing 737-7Q8](https://openairdocs.org/model/boeing-737-7q8) (OpenAirDocs)
- Aircraft serial: 28240
- Aircraft time: 50,677 hours, 33,822 cycles
- System (JASC): [2741 · Stabilizer Position Indicating](https://openairdocs.org/jasc/2741)
- Part: Limit Switch
- Part number: 251A4700
- Condition: Faulty
- Location: Horiz Stab
- Stage of operation: CL
- How discovered: O
- Nature of condition: F
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2019012428881

## Discrepancy

AIR TURNBACK/DECLARED EMERGENCY, ON CLIMBOUT THE NOSE STARTED TO PITCH UP WITHOUT A/P ENGAGED, TRIED NOSE DOWN TRIM AND WOULD NOT WORK. MANUALLY TRIMMED A/C - NO C/B'S POPPED.  R&R NOSE DOWN LIMIT SWITCH IAW AMM.

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