FAA Approved Airplane Flight Manual Supplement

Hawker Beechcraft King Air 300/300LW 190-00716-02 Rev.2
Page 30 of 135 FAA APPROVED
Bolded checklist steps in the EMERGENCY PROCEDURES section indicate pilot
memory action items. The pilot shall perform these items without reference to the
checklist in this section.
AUTOMATIC FLIGHT CONTROL SYSTEM
AUTOPILOT MALFUNCTION / PITCH TRIM RUNAWAY
These procedures supersede the airplane’s UNSCHEDULED ELECTRIC ELEVATOR TRIM
ACTIVATION AFM checklist items.
If the airplane deviates unexpectedly from the planned flight path:
1. Control Wheel .................................................................................................................. GRIP FIRMLY
2. AP/YD DISC / TRIM INTRPT Button ....................................................................... PRESS AND HOLD
(Be prepared for possible high elevator control forces)
3. Aircraft Attitude ............................................................... MAINTAIN/REGAIN AIRCRAFT CONTROL
use standby attitude indicator if necessary
NOTE
Do not release the AP/YD DISC / TRIM INTRPT Button until after pulling the AFCS SERVOS Circuit
Breaker. The rudder boost will also be interrupted when the disconnect button is depressed.
4. Elevator Trim .............................................................. RE-TRIM if necessary using Elevator Tab Wheel
5. AFCS SERVOS Circuit Breaker ...................................................................................................... PULL
(Right circuit breaker panel)
NOTE
Pulling the AFCS SERVOS circuit breaker will render the autopilot, yaw damper and rudder boost
systems inoperative.
6. AP/YD DISC / TRIM INTRPT Button ....................................................................................... RELEASE
IN FLIGHT, DO NOT OVERPOWER THE AUTOPILOT. THE TRIM WILL OPERATE IN THE
DIRECTION OPPOSING THE OVERPOWER FORCE, WHICH WILL RESULT IN LARGE
OUT-OF-TRIM FORCES.
DO NOT ATTEMPT TO RE-ENGAGE THE AUTOPILOT OR USE MANUAL ELECTRIC PITCH
TRIM UNTIL THE CAUSE OF THE MALFUNCTION HAS BEEN CORRECTED.
WARNING