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T
SECTION
7
AIRPLANE & SYSTEMS DESCRIPTION
lvncuuu
cAUcE
CESSNA
MODEL
182S
The
vacuum gauge
is
part
of
the
vacuum
gauge/ammeter'
located
on the lõwei left
corner
of the
instrument panel.
lt
is
atmospheric pressures
at
higher altitudes, the vacuum gauge
may
indicate as low as 4.0 in. Hg.
at
20,000 feet and still
be
adequate
for normal system operation.
LOW VACUUM ANNUNCIATION
Each
engine-driven
vacuum pump
is
plumbed
to a
common
manifold,
located
forward of the firewall.
From
the tee, a single
line
runs into
the
cabin
to
operate
the
various vacuum
system
instruments. This
tee contains
check valves
to
prevent back
flow
into
a
pump
if
it fails. Transducers are
located
just
upstream
of
the
tee and measure vacuum output of each pump.
approximately
10
seconds before turning steady
on.
7-46
Nov
15/00
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