FAA Approved Airplane Flight Manual Supplement

Hawker Beechcraft King Air 300/300LW 190-00716-02 Rev. 1
Page 118 of 137
ELECTRONIC STABILITY & PROTECTION (ESP)
Electronic Stability and Protection (ESP) is an optional function on a GFC-700-equipped airplane that
uses the autopilot servos to assist the pilot in maintaining the airplane in a safe flight condition within the
aircraft’s normal pitch, roll and airspeed envelopes. Additionally, ESP uses the aircraft’s existing lift
computer and stall warning system to protect against stalling the aircraft.
Electronic Stability and Protection is invoked when the pilot allows the airplane to enter one or more
conditions beyond normal flight defined below:
• Pitch attitude beyond normal flight (+22°, -17°)
• Roll attitude beyond normal flight (45°)
• High airspeed beyond normal flight (Above 263 KIAS or .58M)
The conditions that are required for ESP to be available are:
• Pitch and Roll servos available
• Autopilot not engaged
• The Global Positioning System (GPS) altitude above ground (based on TAWS terrain data base)
is more than 200 feet
• Aircraft is within the autopilot engagement envelope (+/-50° in pitch and +/-75° in roll)
Protection for excessive Pitch, Roll, and Airspeed is provided when the limit thresholds are first exceeded,
which engages the appropriate servo in ESP mode at a nominal torque level to bring the airplane back
within the normal flight envelope. If the airplane deviates further from the normal flight envelope, the
servo torque will increase until the maximum torque level is reached in an attempt to return the aircraft
into the normal flight envelope. Once the aircraft returns to within the normal flight envelope, ESP will
deactivate the autopilot servos.
When the normal flight envelope thresholds have been exceeded for more than approximately 10
seconds, ESP Autolevel Mode is activated. Autolevel Mode engages the AFCS to bring the airplane
back into straight and level flight based on 0° roll angle and 0 fpm vertical speed. An aural “ENGAGING
AUTOPILOT” alert sounds and the Flight Director mode annunciation will indicate LVL for the pitch and
roll modes.
Anytime an ESP mode is active, the pilot can interrupt ESP by using either the Control Wheel Steering
(CWS) or Autopilot Disconnect (AP DISC) switch, or simply override ESP by overpowering the AFCS
servos. The pilot may also disable ESP by accessing the Multi-Function Display (MFD) AUX – SYSTEM
SETUP 2 page on the MFD and manually disabling ESP. Once the flight has ended and power is
removed from the G1000 system, ESP will default to “Enabled” on the next power-up.