Preliminary Report: CRJ crew has bad vibrations | Aviation International News

Preliminary Report: CRJ crew has bad vibrations

BOMBARDIER CL-600-2B19, CHATTANOOGA, TENN., MAY 8, 2003–At approximately 12:28 p.m.

By David A. Lombardo • Contributor

August 5, 2008

BOMBARDIER CL-600-2B19, CHATTANOOGA, TENN., MAY 8, 2003–At approximately 12:28 p.m. EDT Canadair Regional Jet N829AS encountered an uncommanded roll during cruise climb in VMC. The aircraft, registered to State Street Bank of Connecticut and operated by Atlantic Southeast Airlines, was operating as Flight 4690 on a Part 121 scheduled flight. The crew elected to make a precautionary diversion to Chattanooga. There were no injuries and the aircraft did not sustain any damage. The flight had departed Atlanta at 12:19 p.m. en route to Montreal.

According to investigators, the first officer (who was flying the aircraft) felt and heard a high-frequency vibration immediately after liftoff. The engine indication and crew alert system did not display any messages. When the airspeed was increased to 250 knots, the vibration started again. The pilot reported the vibration was slow and increased in intensity.

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