Learjet 60 - Flight Management System (FMS)

Pilot's Manual
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FLIGHT MANAGEMENT SYSTEM (FMS)
The Learjet 60 may be equipped with a dual Universal Avionics Sys-
tems Corporation (UASC), a dual Collins, or a single Collins flight
management system . The FMS is an integrated navigation manage-
ment
system
that provides the
pilot
with centralized control for the air-
plane's navigation sensors, computer based flight planning, and fuel
management .
The FMS provides worldwide point-to-point and great circle naviga-
tion
.
The system uses a combination of DME, VOR/DME, single or
dual VLF/Omega, single or dual GPS, and DEN (dead reckoning) to de-
termine the best estimate of present position . VOR and multiple chan-
nel DME are the primary navigation sensors in the FMS . The FMS
contains a subscription
data base which has the appropriate navaids
and airports . When operating with all navigation data available, the
FMS scans for DME signals which, according to its data base present
position, are expected to be received . The outputs of the two DMEs are
multiplexed into
dove channels
for
each DME allowing up to six DMEs
to be scanned . As navigation station signals are received, their Morse
code
identifiers
are decoded for station verification . If at least three
properly positioned DME signals are received, the airplane position
can be determined . When
less than
three DMEs are available, then VOR
bearing, VLF /Omega, GPS, and DR
data are used
as necessary to pro-
vide the most accurate position
fix
possible . In addition to the naviga-
tional inputs, the system also receives true airspeed and altitude
information
from
an air data computer and fuel flow data from the fuel
flow sensors .
Flight management capabilities include VFR/IFR RNAV operation,
direct-to functions, VNAV, approach, and fuel management .
The following two switch/annunciators
are located
on the pedestal
and are used with the FMS .
This switch is used when a checklist is displayed on
the
MFD . Pressing the LINE ADV switch
acknowledg-
es to
curswed line and
advances
it down one line on
the page . This switch also advances the cursored line
on the MID (pilot's or copilot's) as selected by the
JOYSTICK 1/2 switch .
This switch connects the joystick to either the
#1 (left)
or #2 (right) MFD . The joystick is never connected to
both MFDs at once . Press the JOYSTICK select switch
to
connect the joystick to one of the MFDs . The 1 (left)
or 2 (right) annunciator illuminates
to show the
selected MFD .
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