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P I L O T T R A I N I N G G U I D E
When VS mode is active, the pitch angle is limited to ± 20°. The vertical speed
commands are from - 8000 feet/minute to + 6000 feet/minute.
VS mode is activated by selecting VS on guidance panel. VS mode is annunciated in
the vertical capture field on the PFD. VS mode is cleared by selecting another vertical
mode. VS will flash for 5 seconds, when active.
Altitude Select (ASEL) Mode
ASEL mode provides for automatic capture, flare and level off onto a preselected
altitude.
ASEL is armed automatically when the airplane is flying at a continuous vertical rate
of greater than 1 foot/second towards preselected altitude displayed on PFD for 1
second. The preselected altitude is adjusted via the altitude preselect knob on the
guidance panel.
ASEL will capture when ascending toward the preselect altitude and the preselected
altitude is within 2000 feet of current altitude and the altitude rate required to fly a
constant 0.05g capture curve is less than the current airplane inertial climb rate.
ASEL will capture when descending toward the preselect altitude and the preselected
altitude is within 10,000 feet of current altitude and the altitude rate required to fly a
constant 0.05g capture curve is less than the current airplane inertial descent rate.
FGC will generate pitch commands to capture the preselect altitude displayed on the
selected PFD. Pitch angle is limited to ± 20°. Once the reference altitude is reached,
the altitude hold mode is activated.
When ASEL is the active (green) vertical mode, and the ALT
preselector has not been changed, selection of any other vertical
modes other than GS is inhibited.
Attempting to select any vertical mode on the guidance panel
while ASEL is active, the ASEL annunciation on the PFDs shall
flash for five seconds to indicate acknowledgement of the button
press.
While ASEL is active, preselecting the next altitude will enable all
vertical modes.
For Training Purposes Only
Sept 04
AUTOMATIC FLIGHT CONTROL SYSTEM
300
00
23500
Preselect
Altitude
NOTE
ALT
Altitude
Preselect
Knob
2-33
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