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is less than 10% of the full scale (under 0.2 dot).
REV 56, Jan 31/03
Vol. 1 03--20--16
AUTOMATIC FLIGHT CONTROL SYSTEM
Flight Control and Guidance
Flight Crew Operating Manual MASTER
CSP A--013
Glideslope mode is automatically selected when in an approach mode, inbound,
with a valid localizer as the lateral navigation source. Glideslope mode is
automatically cleared by the loss of approach mode. When armed, glideslope
mode is also cleared by turning outbound, or by the loss of a valid localizer as the
lateral navigation source. When captured, glideslope mode is cleared by
changing the source of the lateral navigation signal to an invalid localizer.
Glideslope arming is annunciated with a white GS message in the vertical arm
field on the PFD. Glideslope capture is annunciated with a green GS message in
the vertical capture field on the PFD.
(8) Vertical Go-Around Mode
Go-around mode generates a 10-degree pitch-up command.
Selection of vertical go-aroundmode turns on both flight directors, disengages
autopilot, clears all other vertical modes and switches the flight guidance
commands to a dual-independent configuration. Vertical and lateral modes are
coincident.
When a go-around causes the autopilot to disengage, the autopilot warning can
be cancelled by another push to the TOGA switch, or by pushing the AP
disconnect switch.
Vertical go-around mode is selected by pushing either one of the thrust
lever-mounted TOGA switches while airborne. Go-around mode is cleared by
engaging the autopilot, by selecting FD SYNC or by the selection or capture of
another active mode.
Go-around mode is annunciated with a green GA message in the vertical capture
field on the primary flight display.
F. Altitude Alert System
The primary flight displays (PFD’s) alert the pilots that the aircraft is approaching the
preselected altitude, or that the aircraft is deviating from a previously selected and
acquired altitude. Altitude advisories are indicated on the altimeter portion of the PFD’s
at the preselect altitude digital readouts (above the barometric tape). It is also
displayed at the preselect bugs, including the double bars (across the fine and coarse
tapes).
The altitude alert system processes data from the air data computers and is
independent of autopilot or flight director mode. The ALT knob on the flight control
panel is used to set the desired altitude.
The preselect digital readout and bugs change state and color as follows:
S At the altitude alert threshold, the readout and bugs flash magenta for approximately
four seconds, and a one-second aural tone sounds. The threshold is approximately
1,000 feet from the selected altitude.
Vol. 1 03--20--17
REV 56, Jan 31/03
AUTOMATIC FLIGHT CONTROL SYSTEM
Flight Control and Guidance
Flight Crew Operating Manual
CSP A--013
MASTER
S When within 200 feet from the selected altitude, the readout and bugs come on
steady to indicate altitude capture.
S If the aircraft subsequently deviates more than 200 feet from the selected altitude,
the readout and altitude bugs (double bars) will flash amber and a one second tone
will be heard. The readout and altitude bugs will continue to flash amber as long as
the aircraft is deviated more than 200 feet or cancelled.
S When the airplane is --200 feet below selected altitude the flashing magenta bugs
and readout will cancel.
S If the airplane subsequently continues to deviate (±1000 feet) from the selected
altitude, a one second tone will be heard.
S When the airplane is again within 200 feet of the selected altitude, the readout and
bugs will turn magenta and stop flashing.
Altitude alerts can be cancelled by pushing the ALT switch or selecting a different
altitude. Altitude alerts are inhibited if the glideslope is captured.
Altitude Alert System
Figure 03---20---6
+200 FT
+100 FT
PRESELECT ALT
--100 FT
--200 FT
--1000 FT
ALTITUDE DEVIATION
(DIGITAL READOUT AND BUG
FLASH YELLOW CAN BE
CANCELLED BY PILOT.
MAJOR ALT DEVIATION
AT +/-- 1000 FEET.)
DEVIATION
NOTICE
CAPTURE
DEVIATION NOTICE
(SELECTED ALTITUDE BUG
(DOUBLE BARS) FLASHES
IS MAGENTA)
CAPTURE
(SELECTED
ALTITUDE BUG
AND READOUT
BOTH MAGENTA)
(FLASHING WARNING
CANCELS IF NOT
PREVIOUSLY
CANCELLED
BY THE PILOT.)
ALTITUDE AQUISITION
(DIGITAL READOUT AND 1BUG
FLASH MAGENTA--MAY BE
CANCELLED BY PILOT;
AURAL TONE SOUNDS FOR 1 SEC.)
AURAL TONE
FOR 1 SECOND
AURAL TONE
FOR 1 SECOND
　
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