Cirrus Perspective
™
by Garmin – Pilot’s Guide for the SR20/SR22/SR22T
190-00820-08 Rev. A
478
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 ALT, GS or GP Modes.
While Pitch Hold, Vertical Speed, Indicated Airspeed, 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. The autopilot, if engaged, will follow the pitch up
command from the flight director. Engine power should be reduced and/or the pitch reference adjusted to slow
the aircraft. The annunciation disappears when the overspeed condition is resolved.
NOTE:
When the autopilot is outside normal operating limits, it uses more aggressive commands to return
to normal limits.
Figure 7-44 Overspeed Annunciation
Airspeed
Indicator
UNDERSPEED PROTECTION
NOTE:
While underspeed protection is active, the aircraft will deviate from the selected reference.
Underspeed Protection is designed to discourage aircraft operation below minimum established airspeeds and
is available when the autopilot is on.
When the aircraft reaches a predetermined airspeed (Table 7-6), a yellow MINSPD annunciation (Figure 7-45)
will appear above the airspeed indicator. When the airspeed trend vector reaches a predetermined airspeed
(Table 7-6), a single aural “AIRSPEED” will sound, alerting the pilot to the impending underspeed condition.
TKS FIKI * Flaps
MINSPD Annunciation
Aural AIRSPEED Alert
OFF
0%
80 kt
85 kt
50%
76 kt
80 kt
100%
70 kt
80 kt
ON
0%
85 kt
90 kt
50%
81 kt
85 kt
* The optional TKS Flight Into Known Icing (FIKI) Anti-Ice System is only
available on SR22 Models
Table 7-6 MINSPD Annunciation and AIRSPEED Alert
Summary of Contents for Cirrus Perspective SR20
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