Garmin G1000 NXi Pilot's Manual page 416

AUTOMATIC FLIGHT CONTROL SYSTEM
ALTITUDE-CRITICAL MODES (ALT, GS, GP, GA, FLC)
As the aircraft slows, within 5 to 10 seconds from reaching stall warning, an aural "AIRSPEED" alert will
sound. If the aircraft decelerates to stall warning, the lateral and vertical flight director modes will change
from active to armed, and the autopilot will provide input causing the aircraft to pitch down and the wings
to level.
An aural "AIRSPEED" alert will sound every five seconds and a red "UNDERSPEED PROTECT ACTIVE"
annunciation will appear to the right of the vertical speed indicator. The pitch down force will continue until
the aircraft reaches a pitch attitude at which IAS equals the IAS at which stall warning turns off, plus two
knots.
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Figure 7-31 Underspeed Annunciation
Figure 7-32 Underspeed Protect Active Annunciation
Garmin G1000 NXi Pilot's Guide for the Cessna NAV III
190-02177-02 Rev. A