Level Mode With (Optional) Electronic Stablility And Protection; Overspeed Protection; Underspeed Protection - Garmin G1000 NXi Reference Manual

AFCS

LEVEL MODE WITH (OPTIONAL) ELECTRONIC STABLILITY AND PROTECTION

Level (LVL) mode can also becomes active as a function of the optional Electronic
Stability and Protection (ESP) feature.
When the normal flight envelope thresholds have been exceeded for more than 50%
of the last 20 seconds, Level mode is activated. The autopilot will engage and provide
input to bring the aircraft back into straight and level flight based on zero degrees roll
angle and zero feet per minute vertical speed. An aural engaging autopilot alert sounds
and the lateral and vertical flight director annunciations will display "LVL". The AFCS
will remain in Level mode until the pilot selects another mode.

OVERSPEED PROTECTION

NOTE:
Overspeed protection is not active in ALT, GS or GP modes.
While Pitch Hold, Vertical Speed, Flight Level Change, Vertical Path Tracking, or an
altitude capture mode is active, airspeed is monitored by the flight director. Overspeed
protection is provided to limit the flight director' s pitch command in situations where
the flight director cannot acquire and maintain the mode reference for the selected
vertical mode without exceeding Vne.
When Overspeed Protection is active, the Airspeed Reference appears in a box
above the Airspeed Indicator, flashing a amber 'MAXSPD' annunciation. Engine
power should be reduced and/or the pitch reference adjusted to slow the aircraft. The
annunciation disappears when the overspeed condition is resolved.

UNDERSPEED PROTECTION

Underspeed Protection is available when the optional Electronic Stability and
Protection (ESP) system is installed and the autopilot is on. It is designed to protect
the airplane from stalls. When the aircraft reaches a predetermined airspeed, a yellow
MINSPD annunciation will appear above the airspeed indicator.
For airplanes that have ESP installed, the AFCS can detect and protect against
underspeed situations while the autopilot is engaged. It is designed to discourage
aircraft operation below minimum commandable airspeeds.
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Garmin G1000 NXi Cockpit Reference Guide for the Cessna NAV III
190-02178-02 Rev. A