Super 80 Professional – AOM
FLIGHT MANAGEMENT
Section 15 Page 7
Super 80 Professional – Aircraft Operating Manual
Coolsky, 2018
FMS FLIGHT GUIDANCE MODES
The FMS is capable of providing fully
automatic guidance along a lateral flight
path (NAV) and a vertical flight path
(VNAV). These modes are coupled to the
flight director and/or autopilot and
autothrottles by engaging the NAV and
VNAV switches on the Flight Guidance
Control Panel (FGCP).
NAV Mode
In NAV mode the AFMC outputs lateral
guidance steering commands along great
circle courses between the waypoints
making up the active route. However, when
a procedure stored in the AFMC database is
entered onto the active route, the AFMC
can supply commands to fly a constant
heading, track, or follow a DME arc (not
simulated).
NAV Engagement
NAV mode may be coupled to the DFGS by
selecting NAV on the FGCP as long as the
following conditions are satisfied:
•
Valid input data (DFGC, IRS/AHRS,
CADC, etc)
•
The following FMS data is present
and valid:
o
Aircraft position
o
True airspeed and altitude
data from CADC
o
Active route
o
GWT, cost index and cruise
altitude
•
Autopilot and/or Flight Director
engaged
NAV mode will automatically disengage
when:
•
Another roll mode is selected, such
as HDG HLD.
•
An armed mode becomes
engaged, such as e.g. the transition
from LOC armed to LOC CAP.
•
Input data required for NAV mode
operation is lost.
•
Navigation data (position and
velocity) is lost.
•
The Autopilot and both Flight
Directors are disengaged.
•
Switching from an active to an
inactive route.
•
A DISCONTINUITY or END OF ROUTE is
encountered.