FAA Approved Airplane Flight Manual Supplement

190-00716-02 Rev. 2 Hawker Beechcraft King Air 300/300LW
FAA APPROVED Page 45 of 135
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:
3. 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 RE-TRIM 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.
In RVSM Airspace and Autopilot Inoperative:
7. Altitude ....................................... MONITOR AND MAINTAIN ASSIGNED ALTITUDE MANUALLY
Record each altimeter reading for contingency procedure use
NOTE
The standby altimeter must be corrected for position error using the Altimeter Correction –
Standby System chart in the Performance section of this supplement.
8. Advise ATC of loss of the autopilot system. Perform appropriate RVSM contingency procedures
outlined in the operator’s RVSM manual for the loss of automatic altitude hold capability.