Cessna 172P - Page 316

16
cEssNA
S00
NAV/COM
(TYPE
RT-88õA)
PILOT'S
OPERATING
HANDBOOK
SUPPLEMENT
VOR
SELF-TEST
OPER,ATION:
t.
COM
OFF/VOL
Control
-- TURN
ON.
2.
NAV
Freguency
Selector
Switches
--
SELECT
usable
VOR, station
sigaal.
3.
OBS Knob
--
SET for Oo course
at course
index;
course deviation
pointor
centers o¡
deflects
left
or
right,
depending on bearing of
signal;
NAV/TO-FROM indiaator
shows TO or FIìOM.
4.
ID/VOX/T
Switob
-- PRESS
to
T and HOLD at T; course deviation
pointer
centers and NAV/TO-FROM indicator
shows
FROM.
5.
OBS
Knob
--
TIJRN to displace course
approximately
10"
to
either
side of
0o
(while
holdlng ID/VOX/T to T).
Course
deviation
pointer
deflects full
scale in dircction corresponding
to
course
displace-
ment. NAV/TO-FIìOM indicator shows
FROM.
NOTE
\llhen the 300
NAV/COM ie ooupled to the ANS-3õ1C
R NAV
system the TEST
operation
ie non-fuuctional.
Refer
to the
"Ground
Check Procedures" in the Area Navigation
System
(Type
ANS-3õlC)
Supplement in
thts
section
to
verify VOR, operation
of
the
CDI.
6.
ID/VOX/T
Switch
-- RELEASE for nomal operetion.
NOTE
This
test does not fulfill the
requirements
of
FAR,
91.25.
sEcTroN 5
PERFORMANCE
There is no change
to
the airplane
performance
when this avionic
equipment
is installed. However,
the
installation of
an externally
mounted
antenna or several related exterual
autennF,s, will
result
in
a
minor
reduction
in cruise
performance.
I
30
May 1980