SKY899
Installation Manual
009-11900-001
Installation - Page 2-33
Revision F
July 18, 2013
2.24.1 SKYWATCH/Stormscope Mode Switch
The SKYWATCH/
Stormscope
mode switch (SW1) is required only if a WX-1000
Stormscope
Weather
Mapping System is installed. This switch permits the flight crew to switch the display between the
SKY899 and WX-1000. If a TA (Traffic Advisory) is detected while in the
Stormscope
mode, the display
will switch to the SKYWATCH mode. Refer to Figure 2-3 for interconnect wiring information.
Any general purpose SPST toggle switch (1/2 Amp @ 28 V dc) may be used. Display mode switch cable
routing and length are not critical to system operation. Mount the switch at a location easily accessible to
the pilot.
SKYWATCH/
Stormscope
mode switch connections:
SMS
P1-15
SMS_RET
P1-23
2.24.2 External Overide Switch
This external over-ride switch (SW2) is required if a WX-1000
Stormscope
Weather Mapping System is
installed. The override switch enables the SKYWATCH HP to be powered-up if the WX-1000 processor
has been removed for maintenance. During normal operation the switch should remain in the NORMAL
position and moved to OVERRIDE only if the WX-1000 processor has been removed for service or if it
is necessary to access the WX-1000 service menu. Connect per Figure 2-3.
Any general purpose DPDT toggle switch (1/2 Amp @ 28 V dc) may be used to switch the WX-
1000/SKY497 display PWSWHI and PWSWLO signals from the WX-1000 processor to the TRC
ON/OFF control lines. The maintenance switch cable routing and length are not critical to system
operation. The switch can be located in the avionics bay near the WX-1000 processor.
TRC ON/OFF power
control switch connection:
ON/OFF
P1-4
ON/OFF_RET
P1-5
2.25 ANTENNA INSTALLATION
The following paragraphs provide installation details for directional antenna. Standard installation
practices prescribed in FAA Advisory Circular No. 43.13 must be followed. The installer must ensure the
immediate antenna installation area is clean and prepared so that the antenna is electrically bonded
(metal-to-metal contact) to the aircraft. To provide optimum bonding through the mounting holes, prepare
the surfaces with Alodine No. 1001.
To facilitate mounting to the airframe, the dimensions shown in Figure 2-10 can be used to locate and
drill mounting and connector access holes. Connection to the antenna should be made in accordance with
the system interconnect diagram (Figure 2-2, Figure 2-3 or Figure 2-4).
NOTE
A doubler plate (not supplied) is required to reinforce the aircraft skin.
1.
Connect each of the three antenna cables. Check to ensure that each cable is connected to the correct
antenna connector. Each connector/cable has a matching color band (see note par.2.6.1).
2.
Attach the antenna to the aircraft, with the special adapter plate and o-ring, using 10-32 hardware
provided. See Figure 2-11.
The document reference is online, please check the correspondence between the online documentation and the printed version.