ROCKWELL
COMMANDER
112/B/TC/TCA
MAINTENANCE MANUAL
SECTION vm
INSTRUMENTS
SECTION VIII
INSTRUMENTS
T
ABLE
OF
CONTENTS
Page
GENERAL DESCRIPTION
...•...........•.
..
8-
1
INSTRUMENT SYSTEM MAINTENANCE
......
8-
1
FLIGHT
INSTRUMENTS
....................
8-
2
Pitot-Static
System
....
• • . .
..
.
..
• . . .
..
.•
8-
2
Instrument
Vacuum
System..
.....•..
..
.•.
8-
3
Directional
Gyro (Optional)
.•••.....•...••
8-
7
Attitude Gyro (Optional)
.••...•............
8-
7
Turn
Coordinator
(Optional)..
. . . . . . . . • • .
..
8-
7
Altimeter
Gage
............•..•.......•.
8-
7
Airspeed
Indicator
. . . . . • . . . . . . . . . . . . . . .
.•
8-
7
Rate-of-Climb
Indicator
(Optional)
.•......
8-
8
Magnetic
Compass
.•..........••......•.
8-
8
8-
Day Clock (Optional)
.•.......•.......•.
8-
8
Electric
Clock (Optional)
.••.••...•••.•.••
8-
8
POWER PLANT INSTRUMENTS
.••.•.....•...
8-
8
GENERAL DESCRIPTION
The
standard
equipment
instrument
installation
(Fig-
ure
8-1)
provides
all
instruments
necessary
for
safe
and
efficient
operation
of
the
aircraft.
With the
ex-
ception
of
the
magnetic
compass
and
outside
air
tem-
perature
gage,
all
instruments
are
installed
in
the
main
instrument
panel
and
sub-
panel
areas,
and
are
grouped
according
to
function and
ease
of
surveillance.
Instruments
are
divided
into
three
groups:
Flight
Instruments,
Engine
Instruments
and
Miscellaneous
Instruments.
All
primary
flight
and
gyro
instruments
are
installed
in
the
left
side
of
the
main
instrument
panel.
Carburetor
air
temperature
indicator,
man-
ifold
pressure
and
tachometer
gages
are
mounted
in
the
lower
area
of
the
main
panel
and
the
remaining
engine
instruments
are
grouped
horizontally
across
the
left
instrument
sub-panel.
Optional navigation
and
communications
equipment
is
located
in
the
center
and
right
side
of
the
main
instrument
panel.
The
lower
right
instrument
sub-panel
contains
electrical
system
circuit
breakers
and
heating/ventilation
con-
trol
knobs.
The
manifold
pressure
and
tachometer
gages
and
the
flap
indicator
and
directional
gyro
are
individually
lighted
by
post
lights
and
visible
from
Change 1
Engine
Cluster
Units
...•.•..............
Manifold
Pressure/Fuel
Flow Gage
...•....
Manifold
Pressure/Fuel
Pressure
Gage
.••.
Tachometer
Indicator
...••......•.....•..
Exhaust
Gas
Temperature
Indicator
.•..••••
Carburetor
Air
Temperature
Indicator
.•.••
MISCELLANEOUS INSTRUMENTS
.....•.•.•.•
Suction Gage (Optional)
.•.........•.•••...
Ammeter
••....•.•.•..•.•..•............
Voltmeter
.....•.•....•.....•......•....
Fuel
Quantity
Indicators
.................
.
Flap
Position
Indicator
........•..........
Rudder
Trim
Position
Gage
............•..
STALL WARNING SYSTEM
................
.
Page
8-
8
8-
9
8-
9
8-
9
8-
9
8-
9
8-
9
8-
9
8_
14
1
8-14
8-14A
8-14A
8-14A
8-14A
either
pilots
position.
A dditional
lighting
of
the
in-
strument
and
sub-panel
is
furnished
by flood
lights.
Instrument
and flood
light
brilliance
can
be
controlled
by a
rheostat
control
in
the
instrument
panel.
INSTRUMENT
SYSTEM
MAINTENANCE
Unless
otherwise
specified,
field
maintenance
of
in-
strument
systems
is
limited
to
removal
and
replace-
ment
of
defective
instruments,
transmitters,
and
probes;
authorized
in-
service
adjustment
of
trans-
mitters
and
instruments;
replacement
of
indicator
lamps;
and
repair
of
instrument
systems
between
the
instrument
and
signal
source.
Reliability
of the
various
instruments
and
related
systems
can
be
main-
tained
by
routine
inspection
of
electrical
wiring
for
chafing, and
electrical
connections
for
security.
All
fluid
pressure,
pitot
pressure,
and
static
line
con-
nections
must
be
tight
at
all
times
and
lines
must
be
correctly
routed
and
secured.
Instrument
ports
and
lines
disconnected
during
system
maintenance
must
be
capped
or
plugged
immediately,
to
prevent
the
en-
trance
of
foreign
material
and
consequent
instrument
8-1
Copyright Commander Owners Group 2013 All Rights Reserved
**unofficial copy**
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