# SDR SWAA2016071853894

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 2016
- Submitted: July 19, 2016
- Operation: Air carrier
- Aircraft: N492WN
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33866
- Aircraft time: 42,299 hours, 24,427 cycles
- System (JASC): [2711 · Aileron Tab Control System](https://openairdocs.org/jasc/2711)
- Part: Spring
- Condition: Missing
- Location: Aileron Sys
- Component: Centering Unit
- Component part number: 6939429
- Stage of operation: TO
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2016071853894

## Discrepancy

AIR TURNBACK AT TAKEOFF, FLIGHT CONTROLS FELT VERY LIGHT AND UNRESPONSIVE.  FOUND LOWER SPRING MISSING ON AILERON FEEL AND CENTERING UNIT.   REPLACED UNIT IAW AMM.

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