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if the airplane was previously outside of this region.
) It flashes for two seconds the first time the airplane crossed the selected altitude.
) If flashes continuously in the 200 to 1000 feet region if the airplane was previously inside of
this region (i.e., at the selected altitude). Associated with the visual alerting is an aural alert
(5 short tones) which occurs 1000 feet from the selected altitude upon approaching the
altitude and 200 feet from the selected altitude on leaving the altitude.
) Altitude alerter/vertical speed/baro setting display. This feature is used only if the altitude
preselect option is installed. Normally the altitude alerter selected altitude is displayed. If the UP
or DN button is pushed while in VS hold, the display changes to the command reference for the
VS mode in FPM for 3 seconds. If the BARO button is pushed, the display changes to the
autopilot baro setting in either IN HG or HPA for 3 seconds.
The flight control computer has these controls on the front panel:
) Rotary knobs (only if altitude preselect option is installed). These are used to set the altitude
alerter reference altitude; or may be used immediately after pressing the BARO button, to adjust
the autopilot baro setting to match that of the airplane´s altimeter when manual adjustment is
required.
) AP (autopilot engage/disengage) button. When pushed, it engages the autopilot if all logic
% conditions are met. This button is the only button that can engage the autopilot (only for P/N´s
% 065-00176-5403 and 065-00176-7703). The autopilot will engage in the basic roll (ROL) mode
which functions as a wing leveler and in the vertical speed (VS) hold mode. The commanded
vertical speed may be displayed manually in the upper right corner of autopilot display area if
either UP or DN button is pressed. The captured VS will be the vertical speed present at the
moment of AP button press. When pressed again, it will disengage the autopilot.
) HDG (heading) mode selector button. When pushed, it will select the 'heading' mode, which
commands the airplane to turn to and maintain the heading selected by the heading bug on the
HSI. A new heading may be selected at any time and will result in the airplane turning to the new
heading. The button can also be used to toggle between HDG and ROL modes. This button may
% be used to engage the autopilot (only for P/N´s 065-00176-5402 and 065-00176-7702).
AIRCRAFT
DA 40 Series
AMM
Auto Flight
Doc # 6.02.01
Rev. 5 22-10-00 Page 7
20 Sep 2007
) NAV (navigation) mode selector button. When pushed, will select the navigation mode. The
mode provides automatic beam capture and tracking of VOR, LOC or GPS as selected for
presentation on the HSI. NAV mode is recommended for enroute navigation tracking.
) APR (approach) mode selector button. When pushed, it will select the navigation mode. The
mode provides automatic beam capture and tracking of VOR, GPS, LOC, and Glideslope (GS)
on an ILS, as selected for presentation on the HSI. APR mode tracking sensitivity is
recommended for instrument approaches.
) REV (back course approach) mode selector button. When pushed, it will select the Back course
approach mode. This mode functions identically to the approach mode except that the autopilot
response to LOC signals is reversed.
% ) ALT (altitude hold) mode select button. When pushed, it will select the altitude hold mode. This
% mode provides capture and tracking of the selected altitude. The selected altitude is the altitude
% at the moment the ALT button is pressed. If the ALT button is pressed with an established VS
% rate present, there will be approximately a 10 % (of VS rate) overshoot, with the airplane
% returned positively to the selected altitude. This button may be used to engage the autopilot (only
% for P/N´s 065-00176-5402 and 065-00176-7702).
) UP/DN (vertical trim) buttons. The action of these buttons is dependent upon the vertical mode
present when pressed. If VS mode is active, the initial button stroke will bring up the
commanded vertical speed in the display. Subsequent immediate button strokes will increment
the vertical commanded either up or down at the rate of 100 ft/min per button press, or at the
rate of approximately 300 ft/min per second if pressed continuously. If the ALT mode is active,
incremental button strokes will move the altitude hold reference altitude either up or down by
20 feet per press, or if held continuously will command the airplane up or down at the rate of
500 ft/min, synchronizing the altitude hold reference to the actual airplane altitude upon button
release. (Note that the altitude hold reference is not displayed. The display will continue to show
　
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