IFD500 Series Pilot Guide
Aux Subsystem 5-27
Once issued, the alert will not be eligible to be issued again
unless the aircraft has descended more than 500 feet below the
transition altitude.
If the aircraft is above and then descends to within 250 feet of the
transition level, the IFD will issue the “Transition Level” alert.
Once issued, the alert will not be eligible to be issued again
unless the aircraft has climbed more than 500 feet above the
transition level.
Switch Tanks Alert
This setting controls whether the IFD will issue an alert to switch
fuel tanks. The setting varies the time interval between alerts.
Time intervals of 15, 30, 45, and 60 minutes can be selected, or
the alert can be disabled by selecting “Never”. The factory
default setting is “Never”.
Top of Descent (TOD) Aural
This setting controls whether the IFD will generate a chime when
the aircraft reaches the top of descent point. The factory default
setting is “On”.
Airspace Aural
This setting controls whether the IFD will generate an aural
message saying “Airspace Ahead” whenever an airspace alert is
issued. The factory default setting is “Off”.
Waypoint Aural
This setting controls whether the IFD will generate an aural
message as waypoints in the flight plan are sequenced. The
factory default setting is “Off”.
If the waypoint being sequenced is the final approach fix, the
aural is “Final Approach”. If the waypoint being sequenced is the
missed approach point, the aural is “Missed Approach”. For all
other waypoints, the aural is “Waypoint”.
Altitude Callouts
This setting controls whether the IFD will generate aural
messages as the aircraft descends through certain AGL altitudes
(see page 4-47). The factory default setting is “On”. If the IFD is
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