Vibration?

[Will]

Any chance this will be modeled?  

From the QRH: "As the airplane transitions from cruise to landing, there can be multiple, narrow regions of altitudes and airspeeds where the vibration level can become severe. In general, airframe vibrations can best be reduced by descending and reducing airspeed. However, if after descending and reducing airspeed, the existing vibration level is unacceptable, and if it is impractical to further reduce airspeed, the vibration level may be reduced to a previous, lower level by a slight increase in airspeed."

[Hardy Heinlin]

Engine vibration: yes. Airframe vibration: no.