Aircraft Systems
AUTOMATIC FLIGHT
AL250 Flight Manual
MEP
1. Enter the desired flight plan and activate a leg betwee n two waypoints.
Then verify that the autopilot is connected to the HSI which is connected
to this flight plan.
2. Set manually the HSI course pointer to the current desired track value.
3. Engage the AP, mode NAV. NAV CPLD will illuminate.
4. Autopilot will follow automatically each flight points inserted in current
flight plan.
6-10-3 AUTOPILOT MODES
When one of the modes is being engaged, an aural signal will sound. When a mode
is active, the corresponding push button on the FCP is illuminated and there will be
an indicator above the attitude indicator.
The following modes are available:
• ROLL: This mode is engaged by default, if no other lateral mode is selected.
The current aircraft bank angle is held according these conditions:
– Initial bank angle <6°: flight director maintains wing level.
– Initial bank angle between 6° and 25°: flight director maintains initial
aircraft bank angle.
– Initial bank angle >25°: flight director limits bank angle to 25°.
• HDG: In heading se lec t mode the autopilot searches and follows the heading
set with the orange heading bug on the HSI. To use heading select mode, set
the heading bug to the desired heading, then engage AP (if not yet active) and
HDG. You can also set the bug with the AP engaged.
• NAV (GNS CDI in VLOC mode): In NAV mode the autopilot follows a VOR
signal. Use it as follows:
1. Set the VOR frequency on one of the NAVs and verify that the autopilot
is connecte d to the HSI whic h is c onnecte d to this NAV.
2. Search the VOR by means of the course pointer on the HSI and set the
heading bug in the desired position.
3. Engage the AP, mode HDG and NAV. NAV ARM will illuminate.
4. When the VOR signal has been captured, HDG disengages (if engaged
before), NAV ARM will disappear and NAV CPLD illuminate.
Rev. 1.8 © 2021 ALSIM - All Rights Reserved 6-60
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