Learjet 60 - Page 201

Learjet
60

Pilot's Manual
NAV (navigation) -
The NAV mode provides flight director com-
mands to capture and
track
the navigational
course selected on the
PFD .
APPR (approach) - The APPR mode provides flight director com-
mands
to capture and track the navigational course selected on the PFD
with approach
accuracy .
During ILS
approaches, commands to capture
and track the glideslope will be generated after the localizer
has been
captured .
ALTS (altitude select)
-
The
ALTS mode provides flight director com-
mands to track the selected altitude displayed
above
the
altitude tape
on the PFD .
ALT (altitude
hold) - The ALT mode provides flight director
commands to track the indicated
altitude
present at
the
time
of mode
engagement .
LVL CHG (level
change) - The LVL CHG mode provides flight direc-
tor commands to maneuver the airplane
ona customized
level
change
profile toward the preselected altitude . If the airplane's altitude is
be-
low
the preselect altitude, commands will be generated to climb to and
capture that
altitude . If the airplane's altitude is above the preselect al-
titude, commands will
be generated to descend to and capture that al-
titude .
VS (vertical speed hold) -The VS mode provides flight director com-
mands to maintain the vertical speed selected on the air data reference
panel
(ARP) .
In the absence of a preselected vertical speed, flight direc-
tor commands will
be generated to maintain the vertical speed present
at the time of engagement .
SPD (speed hold) - The SPD mode provides flight director com-
mands to
maintain the existing airspeed (IAS or Mach) when the mode
is selected . The speed hold reference
value can be changed by rotating
the IAS knob on the air data reference panel (ARP) . SPD will
automatically engage if a significant overspeed occurs .
VNAV (vertical navigation) - VNAV
allows
the
pilot to program the
FMS to provide vertical guidance in descent planning or to meet alti-
tude crossing restrictions . VNAV is enabled for aircraft equipped with
dual
FMS .
With
dual UASC FMS, VNAV for enroute, terminal, and
approach is approved . With dual Collins
FMS,
VNAV for
enroute only
is approved .
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