User's Manual

Chapter 3 – Operating Instructions
SKY899 Pilot’s Guide
3-7
Preliminary
When the SKY899 issues a TA, look outside for the intruder
aircraft. When you spot an intruder aircraft, use normal right-
of-way procedures to maintain separation.
Turn Off the SKY899 and the Optional WX-1000
Rotate the OFF/BRT knob on the display bezel counterclock-
wise until the switch turns off.
Operate the WX-1000 Without the SKY899
After removing the SKY899 for maintenance, maintenance
personnel must install a jumper plug if you want to continue
using the
WX-1000.
Operate the SKY899 Without the WX-1000
After removing the WX-1000 for maintenance, maintenance
personnel will move the
WX-1000 maintenance switch to the
OVERRIDE (WX-1000 maintenance) position to allow contin-
ued operation of the
SKY899.
Message Response
When the SKY899 detects a fault, it determines whether the
system has failed or is just degraded. A failed system can not
perform any collision warning functions. A degraded system
can perform some collision warning functions but may not be
able to provide some features such as intruder position en-
hancement via
ADS-B (due to the loss of GPS communications).
Respond to a Failed System
In the case of a failed system, the SKY899 displays a Failed
screen (figure
3-4). All errors indicated by a Failed screen
prevent continued operation of the
SKY899 in SKYWATCH
mode; however, error #20, Barometric Altitude Input, is a
recoverable error. For example, if you turn on and try to
operate the
SKY899 before you turn on the barometric altitude
source and it comes on line, a
SKY899 Failed screen appears
with error
#20 and continued operation of the SKY899 in
SKYWATCH mode is not possible; but when you eventually
turn on the barometric altitude source, the
Failed screen
disappears and operation returns to normal.
Message Response