Airplane Flight Manual Supplement

Hawker Beechcraft C90A and C90GT King Air 190-00682-02 Rev. D
Page 40 of 117
If still inoperative:
• Pitch Trim ............................................................. MANUALLY TRIM AIRPLANE IN PITCH
(Using Elevator Tab Wheel)
NOTE
Autopilot and yaw damper may also be inoperative.
If Operative:
• Use as required
ELEVATOR MISTRIM (amber or annunciation on PFD)
Indicates a mistrim of the elevator tab while the autopilot is engaged. The autopilot will normally
trim the airplane as required. However, during rapid acceleration, deceleration, or configuration
changes, momentary illumination of this message may occur accompanied by minor fluctuations
in flight path. If the autopilot is disconnected while this message is displayed, high elevator
control forces are possible. In the event of sustained illumination, the following procedure
should be followed:
1. Control Wheel .............................................................................................................GRIP FIRMLY
2. Elevator Tab Wheel.................................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 changes in airspeed or configuration from the
previous trimmed condition:
3. Control Wheel .............................................................................................................GRIP FIRMLY
4. Elevator Tab Wheel.................................ROTATE SLOWLY IN THE DIRECTION OF INDICATED
MISTRIM UNTIL ANNUNCIATION EXTINGUISHES
5. AP/YD DISC / TRIM INTRPT Button ............................................................PRESS and RELEASE
(Pilot’s or Copilot’s control wheel)
6. Pitch Trim.............................. USING ELEVATOR TAB WHEEL, MANUALLY RETRIM AIRPLANE
Autopilot should be considered inoperative until the cause of the mistrim has been investigated
and corrected. Yaw damper may be re-engaged and used normally.