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Section VII
Sensors & Interfaces
2423sv602 TOC-iii
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TABLE OF CONTENTS - CONTINUED
RADAR/MFD INTERFACE ...................................................... 7-54
Radar Waypoints ................................................................... 7-54
COLLINS EFIS INTERFACE ................................................... 7-55
Two-Way Interface with Heading Bug................................... 7-55
Go-Around Function .............................................................. 7-55
The Creation and Use of ILS Approaches ............................ 7-56
Automatic Display of Second Course.................................... 7-56
Enroute VNAV Pitch Commands........................................... 7-56
Section VII
Sensors & Interfaces
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INTRODUCTION
The FMS is capable of interfacing with a variety of sensors providing
data used for navigation. These sensors range from complicated
devices capable of autonomous navigation to simple ratio sensors.
The philosophy is to allow the pilot to control the function of each
sensor to allow control and selection for use by the FMS. The
following table summarizes sensor selection and deselection
occurring at various events.
Powerup On Ground Select IRS, and any GPS that is in nav
or altitude mode. All other sensors are
deselected.
Powerup In Air Select all sensors.
On Ground Select any GPS that is in nav or altitude
aiding mode and deselect any GPS that
is not in nav or altitude aiding mode.
Takeoff Select all sensors except ones that had
been previously manually deselected.
Non-VFR Approach
Armed
If a GPS or GPS overlay approach
contained in the navigation data base is
in use, deselect all sensors except IRS,
ADS, radios, and the GPS that is
currently being used for navigation.
Otherwise, deselect all sensors except
IRS, ADC and radios.
Approach Canceled (In
Air)
Reselects all previously deselected
sensors.
Landing Deselect all sensors except IRS and any
GPS that is in nav or altitude aiding
mode.
This section contains those operating procedures required to
manually select or deselect sensors or stations and procedures to
manually input certain flight parameters in the event of a sensor
failure.
Section VII
Sensors & Interfaces
7-2 2423sv602
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AIR DATA
ADC Status
The ADC status page, accessed from DATA page 2, displays the
status of the air data computer (ADC). The ADC is automatically
deselected during ground operations and is automatically selected at
liftoff. The ADC can be manually deselected or reselected by using
line select key [4R].
The top of the page shows the page title (ADC) and the status of the
system. The status field (beneath "ADC") will show NORMAL if the
ADC is operational and selected, FAILED if the ADC has failed,
XFILL if the data is cross-filled from a second ADC, and (D) if the
ADC has been deselected.
TAS - The true airspeed being used by the navigation computer.
Dashes will be displayed if there is no TAS input, (MAN) will be
displayed if the TAS is a manual entry and (XFL) will be displayed if
the XFILL option has been selected. A manually selected TAS
overrides a sensor supplied TAS input and will be used even if the
ADC is deselected or failed. A manual TAS entry is deleted by
pressing the BACK and ENTER keys with the cursor over the TAS
entry field.
BARO and TAS ALT - The altitude in feet as supplied by the air
data computer. Dashes will be displayed if there is no altitude input,
(MAN) will be displayed if the altitude is a manual entry and (XFL)
will be displayed if the XFILL option has been selected. A manually
selected altitude overrides a sensor supplied altitude. A manual ALT
entry is deleted by pressing the BACK and ENTER keys with the
cursor over the ALT entry field.
Section VII
Sensors & Interfaces
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Change 1
IAS - The indicated airspeed in knots as supplied by the air data
computer. IAS will not be displayed on installations, which do not
receive IAS from the air data computer.
MACH - The Mach number as supplied by the air data computer.
Mach will not be displayed on installations, which do not receive
Mach from the air data computer.
XFILL/LOCAL - XFILL will be a line select key option when a
second FMS is installed. This will cause TAS, SAT and ALT to be
displayed from the other ADC. When [XFILL] is selected "(XFL)" will be
displayed next to the TAS, SAT and ALT values, the IAS and MACH
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