PROCEDURE TROUBLESHOOTING REFERENCE
AVIONICS FLIGHT CHECKS (CONT)
Test procedure: Observe screen for proper display. Test
display consists of two green, two yellow, and a red band
on a 120° scan. The word TEST will be displayed in upper
right corner. Operating mode selected by MODE switches
(either MAP, WX, or WXA) has been displayed in lower left
corner. If WXA has been selected, red band in the test
pattern will flash on and off. Range will be displayed in
upper right corner beneath TEST and appropriate range
mark distances will appear along right edge of the screen.
Complete test patterns may be seen only on 80 mile range
or higher. Flying level at an altitude of 8,000 to 10,000 feet
will allow mapping of ground targets to a range of
approximately 100 miles.
Antenna stabilization check: