# SDR SWAA2017022712103

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 26, 2017
- Submitted: February 27, 2017
- Operation: Air carrier
- Aircraft: [N8313F](https://openairdocs.org/aircraft/N8313F), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 38810
- Aircraft time: 17,166 hours, 7,234 cycles
- System (JASC): [2731 · Elevator Tab Control System](https://openairdocs.org/jasc/2731)
- Part: Valve
- Part number: 251A24207
- Condition: Malfunctioned
- Location: Elevator Tab
- Stage of operation: CL
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2017022712103

## Discrepancy

AIRFRAME VIBRATION FELT AT 170KTS AFTER TAKEOFF.  VIBRATION INCREASED WITH AIR SPEED. RETURNED TO DEPARTURE.   R & R THE ELEVATOR TAB CONTROL VALVE IAW MM.

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