TM 55-1510-215-MTF
PROCEDURE
TROUBLESHOOTING
REFERENCE
c.
HSI's/RMI's - Set to display NAV/VOR.
d.
Frequency selectors - Set test
K26
frequency: Verify station identification
(audio).
e.
Fly directly toward a VOR station of
known direction and near enough to
provide a reliable signal.
f.
Course selector knob (HSI) -
K27,K28
Set indicator needle on course to station.
The course deviation bar should be
centered and the to/from indicator should
read to. The GS off indicator should be
visible but the NAV off warning flag
should be concealed.
g.
Course selector knob (HSI) -
K28
Set indicator needle on reciprocal of
course to station. The course deviation
bar should be centered and the
to/from indicator should read from.
h.
Course selector knob (HSI) - Set indicator
needle on course to station. The course
deviation bar should be centered and the
to/from indicator should read to.
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