# SDR SIMA201804254002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 24, 2018
- Submitted: April 25, 2018
- Operation: Air carrier
- Aircraft: [N228NN](https://openairdocs.org/aircraft/N228NN), registered now
- Make and model: Emb ERJ 170-200 LR
- Registry model: [EMB ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr) (OpenAirDocs)
- Aircraft serial: 17000545
- Aircraft time: 5,214 hours, 3,624 cycles
- System (JASC): [2700 · Flight Control System](https://openairdocs.org/jasc/2700)
- Part: Unknown
- Condition: Malfunctioned
- Location: Flt Controls
- 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/SIMA201804254002

## Discrepancy

DURING CLIMB OUT AT 20,000FT, 290 KNOTS,  AN UNCOMMANDED ROLL TO THE LEFT, THEN RIGHT, 20 DEGREES WITH SHUDDER & VIBRATION.  HAPPENED AGAIN 5 MINUTES LATER.   TURNED AUTOPILOT OFF AND CONTINUED FOR ANOTHER 10 SECS. DIVERTED BACK TO DEPARTURE WITH NO FUTHER ISSUES, ENGINE PARAMATERS NORMAL.  PERFORMED A RUDDER DEFLECTION CHECK IAW AMM 27-20-00,  CHECKED GOOD.  PERFORMED GUIDANCE PANEL OPERATIONAL TEST IAW AMM 22-11-01-710-801-A. OPS TESTED GOOD.  PERFORMED  AILERON DEFLECTION CHECK IAW AMM 27-12-01, CHECKED GOOD.  REMOVED RIG PIN IAW AMM 22-11-04.   REMOVED AND REPLACED AILERON SERVO IAW AMM 22-11-04, AND PERFORMED AN OPS CHECK IAW 22-11-04-710-801-A, OPS CHECKED GOOD. AND ACCOMPLISHED DEFLECTION AND OPERATIONAL CHECKS WITH NO DISCREPANCIES FOUND OPS CHECKED GOOD.  ACFT OK FOR RETURN TO SERVICE.

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