Aspen Avionics Evolution EFD 1000 C3 Pro PFD - Ground Speed >50 Kts Annunciation

CHAPTER 4 REFERENCE GUIDE
Page 4-11
091-00019-001 REV B
EFD1000 C3 Pro PFD Pilot’s Guide
Indicated airspeed is displayed in knots, miles per hour or mach number, set at
installation, with tick marks rendered on the Airspeed tape every ten (10) units. Speed
Bands and Speed Markers are congured during installation and cannot be changed
or removed by the pilot. The textual Vspeeds are pilot-congurable and are discussed
in Chapter 5, Customizing the PFD. Although the pilot can set the selected airspeed
(bug), there is no visual or aural annunciation provided when the actual airspeed
deviates from the selected airspeed value.
The numerical airspeed value is displayed in a rolling drum format in the center of the
airspeed tape with numbers moving downward as speed increases, and upward as
speed decreases. The display range of the indicated airspeed is 20–450 (knots or miles
per hour). The numerical airspeed value is displayed in red when Vne is exceeded or
when the airspeed drops below Vs0 during stalls or landing roll-outs (Figure 4-8).
Figure 4-8
Actual Airspeed Greater Than the Vne
Figure 4-9
Pitot Obstruction Monitoring Airspeed
<30kts, Ground Speed >50kts
Annunciation
NOTE
When airspeed is less than 30 knots but ground GPS speed is greater than 50 knots, a
red X and annunciation of CHECK PITOT HEAT is displayed on the Attitude Indicator
(Figure 4-9).