TIME button - Press then check that
correct day is displayed; press again and
check for correct hours and minutes, then
a third time and check for correct minutes
Frequency - Select operating frequency
(or channel) of an FM station of known
MODE selector - HOM.
HSI select switch panel (instrument panel)
HSI (instrument panel) Observe bearing
to station displayed on course pointer and
signal strength displayed on glideslope
When possible, check
frequency-hop (FH MODE) operations for loud
and clear communications.
*18. UHF/FM voice security sets
(TSEC/KY-58) - Check as follows:
Ensure associated radio set (FM liaison,
17. above, or UHF command, 13.
above) is operable.
MODE switch (voice security set) - C