throughout the frequency range of 200 to
Single or double bearing pointer source
selector switch (display controller) - ADF.
Both single and double needle pointers on
both the pilots and copilots EHSI should be
Verify accuracy of ADF indications on pilots
and copilots EFIS displays over a known
ground reference point approximately every
90 throughout 360.
Navigation receivers (VOR/localizer/
glideslope/marker beacon) - Check as follows:
VOR receivers - Check each VOR receiver
NAV A control (audio control panel) -
Depress on and rotate clockwise to set
navigation receiver control unit) - ON.
receiver control unit) - As required.
Tuning knobs - Set test frequency.
switch (display controller) - Depress to
select VOR1 or VOR2 navigation