SA160
AIRCRAFTA I R C R A F T
Symphony
AIRCRAFT
7of15
SECTION 9
SUPPLEMENT 2
SECTION 4
NORMAL PROCEDURES
4.1 POWERING ON THE GNC 420
Normal operating procedures are completely described in the GARMIN
GNC 420Pilot's Guide, P/N 190-00140-20, Rev. A, dated July 1999, or later
appropriaterevision.
TheGNC420isshowninfigure7-1.NOTE:
(a) Rotate the Com power/volume knob clockwise to turn the unit
onandsetthedesiredradiovolume.
(c) A welcome page appears briefly and the unit will conduct a self-testto
ensureproperoperation.Duringtheself-testcheck for:
(1) CDI-halfleft/noflag
(2) G/S-half/no flag
(3) TO/From flag-to
(4) Bearingto-135°
Feb 25, 2005
approach course guidance may still be available with 1 nautical mile
CDIsensitivitybyexecutingthemissedapproach.
(e) Emergency Frequency of 121.500 MHz
In an in-flight emergency,depressing and holding the Comm transfer
button for 2 seconds will select the emergency frequency of 121.500
MHzintothe"Active"frequency window.
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