02-22-15
F2000EX EASY
PAGE 6 / 10
CODDE 1
ISSUE 3
ATA 22 – AUTO FLIGHT
SPEED PROTECTION MODE
DGT94085
DASSAULT AVIATION Proprietary Data
Auto-Throttle Speed Protection mode disengagement
The ASP is disengaged when:
-
the normal speed flight envelope has been re-entered, and
o
the speed bug is moved, or
o
the AT is disengaged.
FIGURE 02-22-15-04 DISENGAGEMENT OF THE ASP MODE
PITCH SPEED PROTECTION (PSP)
Engagement
The Pitch Speed Protection (PSP) mode can be activated in every vertical mode other
than ASEL, ALT, VALT, G/S, TO, GA, WS and VGP and it will protect the airplane from
overspeed only. It is automatically activated when the ASP is not able to make the
airplane re-enter within the limits of the normal speed flight envelope.
NOTE
In ASEL, ALT, VALT, G/S, VGP modes, holding the path is considered more important than
speed control so PSP is not available in these modes. PSP is not available for low speeds.
The PSP is always activated after ASP engagement. In that case, the vertical AutoPilot
mode is automatically changed (PROT indication in the Flight Mode Annunciator FMA).
Then, when the PSP is activated, two PROT modes is displayed in the FMA (one for ASP
as AT mode and one for PSP as vertical AP mode).
When the PSP is activated, the AutoPilot will track a nose up Flight Director (FD)
command, calculated by the system. The AutoPilot maintains speed at the tear drop bug
level (VMO / MMO); in the same time, engines are maintained at idle power.