# SDR 200606161

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 14, 2006
- Submitted: June 16, 2006
- Operation: Air carrier
- Aircraft: N646RW
- Make and model: Emb ERJ 170-100
- Registry model: [EMB ERJ 170-100](https://openairdocs.org/model/embraer-empresa-brasileira-de-erj-170-100) (OpenAirDocs)
- Aircraft serial: 17000064
- Aircraft time: 3,419 hours, 2,248 cycles
- System (JASC): [3436 · Wind Shear Detection System](https://openairdocs.org/jasc/3436)
- Part: Warning System
- Condition: Malfunctioned
- Location: Windshear Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/200606161

## Discrepancy

AFTER LIFTOFF APPROX 300 FT, ENCOUNTERED WAKE TURBULENCE FROM PRECEDING AIRCRAFT.  THERE WAS NO -CAUTION WAKE TURBULENCE- STATEMENT FROM ATC.  CREW REPORTED -TURBULENCE WASN'T EXTREMELY VIOLENT; CAUSED VERY ABRUPT LEFT AND RIGHT ROLLING MOTIONS THAT VERY BRIEFLY MADE THE AIRCRAFT SOMEWHAT UNCONTROLLABLE LASTING ABOUT 2-3 SECONDS.  DURING THE WAKE TURBULENCE EVENT, THE CREW RECEIVED A MASTER CAUTION ALARM AND 3 AMBER MESSAGES ON THE EICAS: -SHAKER, ANTICIPATED AOA LIMIT FAIL, AND WINDSHEAR FAIL-.  RETURNED TO ORD, DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT.  MX CYCLED A/C POWER, MESSAGES CLEARED.  FHDB DOWNLOADED FOR FURTHER TROUBLESHOOTING.  AIRCRAFT HAS NO HISTORY, DISCREPANCY HAS NOT REPEATED.

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