02-22-10
F2000EX EASY
PAGE 20 / 22
CODDE 1
ISSUE 3
ATA 22 – AUTO FLIGHT
DESCRIPTION
DGT94085
DASSAULT AVIATION Proprietary Data
AUTOPILOT CAT II APPROACH
The EASy installation contains two dual Flight Directors.
This standard dual configuration and the fail operational design for the AFCS provide
automatic reversion and interface capabilities sufficient to maintain full AFCS functionality in
case of failure of one FD.
The reversion is annunciated to the crew via an advisory CAS message, but will result in no
changes to the mode selection or engage status.
Aproach mode (APP) is selected by pressing the APP pushbutton on the GP. Approach
Category must be selected in the Landing data base of the Flight Management Window.
FIGURE 02-22-10-23 GUIDANCE PANEL CONTROL
The AFCS enters dual sensor mode if the following conditions are met:
-
both PDU display the same approach guidance source (ILS),
-
both navigation sources are valid,
-
both PDU indicate they are receiving the same radio frequency from the NAV receivers,
-
both PDU receive radio information from independent radios.
Whilst operating in this dual sensor mode, the AFCS utilizes approach navigation data as
follows:
-
the AFCS uses averaged deviation data as long as both sources are unflagged and
tracking (no miscompares detected),
-
the AFCS reverts to single PDU status using the unflagged source, if one PDU or the radio
data is invalid,
-
the AFCS reverts to single PDU status using the most reasonable source if both are
unflagged, but not tracking (miscompare detected).
If during the dual approach track mode, the displayed data on one of the two PDU become
invalid, the AFCS continues the approach using the valid data from the remaining PDU.
After a transition from dual approach track status, the AFCS reverts to the selected single
PDU status (couple) in effect prior to acquisition of dual PDU status.
