Section 5 Menu Functions and Procedures
5-2
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
Rev A Apr 2019
5.1.1. Menu
Philosophy
The menu system and buttons with an action are clearly labeled. The
following rules are in the design of the menu system:
EXIT (R1)
: Whenever menu system is beyond the top-
level, provides a one-touch escape to the top-level.
BACK (L1)
: Whenever soft menu level is deeper than the
first-level, regresses through the menu system by one level.
Soft menu tiles
: Used (even at the top-level) and are annunciated on the
screen adjacent to the appropriate IDU button or encoder when
appropriate.
Selection list
: Menus adjacent to
are frequently a selection list. Lists
too long to be presented in the space available provide an indication of
location within the list.
Within lists or on a soft menu tile, a two-dot trailer
indicates further menu levels.
Menu messages are displayed for five seconds but are
cleared if no IDU button is pressed or encoder pushed
or scrolled.
Figure 5-2: IDU-450 Input Controls
5.1.2. Avoidance of Autonomous Behavior
TAWS/HTAWS popups
: When an FLTA alert is generated, a popup
function enables PFD SVS TAWS feature and activates terrain at an
appropriate scale and format on the MFD moving map page. This is a
required function of TSO-C194 for Enhanced HTAWS and is enabled in the
other TAWS/HTAWS options integrated in the EFIS software. (See Section
8 Terrain Awareness Warning System for details.)
Traffic popups
: When a traffic alert is generated, a popup function displays
traffic on the PFD, traffic thumbnail and MFD moving map page.
