
a green ALT. The green bar next to the ALT
mode switch will also illuminate.
When ALT is engaged, the FD commands pitch
to hold the existing altitude at the time the ALT
button was depressed, or at the ASEL refer-
ence altitude if ALT automatically engages.
ALT may be disengaged by depressing the
ALT button a second time or by selecting an-
other vertical mode (SPD, FLC, VS, or VNV).
If the autopilot is engaged, ALT will also dis-
engage if a pitch change is commanded through
the AP manual pitch control (i.e. moving the
control wheel trim switch forward or aft with-
out depressing the arming button.
GA (Go-around)
The go-around (GA) button is located on the
side of the left thrust lever. Depressing the
GA button disconnects the AP (not YD), if en-
gaged, and cancels all other vertical modes ex-
cept altitude preselect arm. With GA selected,
the FD provides a wings level command bar
with a fixed pitch attitude of + 9°.
The GA pitch attitude has no significance in
relation to airplane performance. It is strictly
a pitch reference for takeoff or go-around.
When selected, “GA” is annunciated on the
PFDs in the vertical mode area and “ROL” is
annunciated in the lateral mode area.
GA is canceled with ASEL capture or by en-
gaging any other vertical mode. It can also be
canceled by depressing the TCS button.
Maximum Speed (MAX SPD)
The FD/AP incorporates an overspeed pro-
tection mode that is functional in the SPD and
VS modes. When overspeed protection mode
is active, MAX SPD is annunciated on the PFD
and the system attempts to prohibit excursions
beyond VMO/MMO. During MAX SPD an-
nunciation, the FD/AP will prevent overspeed
by commanding a nose up pitch change. The
engaged vertical flight director mode status
and reference on the PFD do not change, even
though the computer is not providing guid-
ance to this selected value. Once the overspeed
is exited, the MAX SPD annunciation is re-
L E A R J E T 4 5
P I L O T T R A I N I N G M A N U A L
16-90
FOR TRAINING PURPOSES ONLY
FlightSafety
international
Figure 16-49. Descent Profiles (FLC/FLCH)