King Air C90GTi, Pilot Training Manual

Page: 396 / 557

Finally, the RADIO ID field is the xM sub-
scription number. This is needed when the xM
feature needs to be turned ON initially or re-
instated after it fails to communicate with the
satellite system.
Each press of the CCP ESC key will remove
one submenu at a time until all menus are re-
moved and the dedicated graphical weather
page is in view.The graphical weather page can
be moved using the CCP joystick to the full
extent of the US borders and is not limited by
aircraft position or FMS waypoints. Addition-
ally, each press of the CCP ZOOM key will
provide three levels of zoom. Each level of
zoom is indicated above the weather map
(Figure 16-115). The zoom levels are indicated
with these labels: x1=Entire CONUS; x4 = ¼
of CONUS; x16 = 1/16 of CONUS.
Figure 16-115. MFD Graphical Weather
Time Stamps
Time entries are also displayed above the
weather map. The current UTC time is used to
provide a reference for the age of each chosen
overlay. Once an affected overlay exceeds a set
age, the time below the label will turn yellow
with a yellow box. The pilot cannot request a
specific update since xM weather is designed
to continuously receive weather information.
Caution should be exercised when referencing
the affected overlay for weather information.
If an overlay is selected OFF then the label
and time stamp are removed.
UNIVERSAL WEATHER
(GWX-5000)
The Universal weather provider is labeled as
the GWx-5000 system for the Collins IFIS.
Universal weather uses an additional VHF
COM3 radio and an additional VHF antenna.
The antenna is located under the empennage
of the aircraft and is attached to a Collins
Communications Management Unit (CMU-
4000) in the aft avionics shelf. The CMU han-
dles all outbound and inbound COM3 VHF
transmissions that are requested from the pilot
through an additional CDU page. The COM3
system is not connected to the audio panels or
audio controls in the cockpit. Optionally, the
CMU unit is capable of datalink communica-
tions (e.g., ACARS or AFIS) using an HF,
SATCOM and/or VHF radio.
The Universal weather provider is a request
only system. Each weather image or weather
data is first requested by the pilot through the
CDU datalink page. If the aircraft is within
radio coverage of an appropriate ground-
based station, the image or information is sent
via VHF communication to the CMU unit. A
CDU and MFD message will appear when the
image is available for view.
To access the CDU graphical weather page,
press IDx
MCDU MENU. On this page, a
Datalink (DL) option is available that will
show the Graphical Weather request page
(Figure 16-116). The images shown only con-
tain the graphical weather selection, but each
page may contain other optional items such as
textual weather, digital ATIS, received ATC
messages, etc. Selecting the REQ field for
GRAPHICAL Wx, will display the available
weather products (Figure 16-117). Navigating
between the two available pages allows selec-
tion of the desired weather image. Pressing the
left side keys will select the main image and
turn it green. Pressing the right side keys will
display a new page where the desired Region,
Altitude, or Forecast time options can be set
for the selected image. Once the selections are
complete pressing the SEND line select key
will initiate the CMU communication with an
available VHF datalink station. The RE-
QUEST STATUS option can be used to iden-
tify which images are still downloading and
which images have been received. If the CDU
is used for other functions while the informa-
tion is downloading a “GWx RCVD” message
will appear on the CDU message line.
16-63
FOR TRAINING PURPOSES ONLY
KING AIR C90GTi/C90GTx PILOT TRAINING MANUAL
16
A
VIONICS