Airplane Flight Manual Supplement

190-00682-02 Rev. C Hawker Beechcraft C90A and C90GT King Air
Page 31 of 95
RUDDER MISTRIM (amber or annunciation on PFD)
Indicates a mistrim of the rudder while the autopilot is engaged. During large changes in
airspeed, engine failure, or single engine operation, illumination of this message may occur. If
the autopilot is disconnected while this message is displayed, high rudder pedal forces and
yawing motion are possible. The following procedure should be followed:
1. Rudder Pedals ...........................................................................................................HOLD FIRMLY
2. Rudder Tab Knob....................................ROTATE SLOWLY IN THE DIRECTION OF INDICATED
MISTRIM UNTIL ANNUNCIATION EXTINGUISHES
IF THE ANNUNCIATOR STAYS EXTINGUISHED AND NO OTHER ANNUNCIATIONS ILLUMINATE
• Continue to operate the autopilot in a normal manner after the annunciation extinguishes.
IF THE ANNUNCIATOR REMAINS ILLUMINATED OR REAPPEARS WITH NO CHANGE IN
AIRSPEED, CONFIGURATION, OR ENGINE POWER FROM THE PREVIOUS TRIMMED
CONDITION:
3. Rudder Pedals ...........................................................................................................HOLD FIRMLY
4. Rudder Tab Knob....................................ROTATE SLOWLY IN THE DIRECTION OF INDICATED
MISTRIM UNTIL ANNUNCIATION EXTINGUISHES
5. YD Button...............................................................................................PRESS on Mode Controller
6. Rudder Tab Knob..........................................................................MANUALLY RETRIM AIRPLANE
Yaw Damper should be considered inoperative until the cause of the mistrim has been
investigated and corrected. The Autopilot can continued to be used normally without the Yaw
Damper.