Section 16. Autoflight Eclipse 5OO Systems Manual
Copyright © — Eclipse Aviation Corporation
418 Version 2.0 April 2007
ENGAGEMENT
The Autothrottle (ATS) engagement envelope is the same as the autopilot.
Autothrottle engagement is accomplished by pressing the ATS button on the autopilot
control panel.
AUTOMATIC DISENGAGEMENT
The autothrottle will automatically disconnect if one of the following occurs:
1. Both engines OFF
2. Weight-On-Wheels (on ground) and airspeed less than 45 knots
3. Stick pusher is activated
4. Stall Warning issued
5. Autothrottle failure
MANUAL DISENGAGEMENT
The autothrottle will manually disconnect if:
1. ATS OFF/ON button on autopilot control panel is pressed
2. A/T DISC button on left throttle is pressed
3. Autopilot disengaged
4. ALL INTERRUPT switch on either sidestick is pressed
5. Pilot manually pushes throttles- actual position and autothrottle position vary by
>10° for three seconds
16.5.7 Flight Envelope Protection
The autoflight system continuously monitors airspeed trends and uses the
autothrottles to prevent an aircraft overspeed or stall as the aircraft nears overspeed
(V
MO
, M
MO
) or underspeed (stall). In addition to speed protection the autoflight
systems also uses the autothrottles to aid the stall protection system in preventing a
deep stall.
OVERSPEED PROTECTION
If the aircraft will exceed maximum speeds by 6 knots (.02 mach) or another
maximum speed based on aircraft configuration (i.e. V
FE
), the autothrottle system will
automatically reduce the position of the throttles. A red SPD PROT appears in the
speed portion of the flight mode annunciation window. Overspeed protection (OPS)
function is based on whether or not the autopilot is engaged; outlined below.
Table 44. Overspeed Protection Based on Autopilot Engagement
Autopilot ENGAGED Autopilot DISENGAGED
Autothrottle-
-Automatically engages to control and limit
airspeed
Autothrottle-
-Automatically engages to control and limit
airspeed
Autopilot-
-Used to reduce and control airspeed using
pitch (elevator)
-Autopilot-
Will NOT automatically engage, pilot must
manually control airspeed using pitch
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