Model 560XL Section III – Operating Procedures
Abnormal Procedures
190-02313-03 Rev. 8 Textron Aviation Citation 560XL
FAA Approved 3-33
RUDDER MISTRIM
RUD or RUD Annunciator displayed
Indicates a mistrim of the rudder while the yaw damper is engaged. The servo is providing force in
the indicated direction. The system cannot trim the airplane in yaw. This message may be
displayed during conditions of high asymmetric thrust. If the yaw damper is disconnected while this
message is displayed, high rudder pedal forces and yawing motion are possible. The following
procedure should be followed:
1. Rudder Trim – AS REQUIRED in the direction of indicated mistrim until annunciation
extinguishes.
IF THE ANNUNCIATOR STAYS EXTINGUISHED
2. Continue to operate the autopilot and yaw damper in a normal manner after the annunciator
extinguishes.
Procedure completed
IF THE ANNUNCIATOR REMAINS ILLUMINATED OR REAPPEARS WITH NO CHANGES IN
AIRSPEED OR CONFIGURATION FROM THE PREVIOUS TRIMMED CONDITION
CAUTION
HIGH RUDDER FORCES MAY BE PRESENT WHEN THE YAW DAMPER IS
DISENGAGED.
2. Rudder Pedals – HOLD FIRMLY
3. AP YD DISC/TRIM INT button – PRESS AND RELEASE
4. Rudder Trim – AS REQUIRED
5. Do not attempt to engage the autopilot or yaw damper. The yaw damper should be
considered inoperative until the cause of the mistrim has been investigated and corrected.
6. With autopilot inoperative, perform appropriate RVSM contingency procedures for the loss of
automatic altitude hold capability.
Procedure completed
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