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页码 632
190-00498-07  Rev. A
Garmin G1000 Pilot’s Guide for Cessna Nav III
477
AUTOMATIC FLIGHT CONTROL SYSTEM
SY
STEM
O
VER
VIEW
FLIGHT
INSTRUMENTS
EIS
AUDIO P
ANEL
& CNS
FLIGHT
MANA
GEMENT
HAZARD
AV
OID
ANCE
AFCS
ADDITIONAL
FEA
TURES
APPENDICES
INDEX
OVERSPEED PROTECTION
 NOTE: 
Overspeed protection is not active in Altitude Hold, Glideslope or Glidepath 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. Pitch commands are not changed until overspeed protection
becomes active. Overspeed protection is provided in situations where the flight director cannot acquire and
maintain the mode reference for the selected vertical mode without exceeding the certified maximum autopilot
airspeed.
When an autopilot overspeed condition occurs, the Airspeed Reference appears in a box above the Airspeed
Indicator, flashing a yellow ‘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.
Figure 7-41  Overspeed Annunciation
Airspeed 
Indicator