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The airspeed indicator supplies non-corrected (indicated) airspeed. It uses the standby
pitot source P3 and the standby static ports S3.
Standby Airspeed Indicator
Figure 11-27
400
350
300 250
200
150
100
60
KTS
IAS
Speed Pointer
Indicates speed readout
in knots indicated
P604_11_019
FLIGHT INSTRUMENTS
11-48 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
Standby Altimeter
The standby altimeter incorporates an altitude pointer and an altitude counter. The
altitude pointer and altitude counter operate through a mechanical linkage connected
to a pressure capsule. The pressure capsule moves with changes in static pressure.
Barometric correction is selected by a knob at the bottom right of the instrument and
displayed in inches of mercury and hectopascals. The instrument receives its static
pressure from the standby static ports S3.
Standby Altimeter
Figure 11-28
Standby Attitude Indicator
The standby attitude indicator has an electrically-operated vertical gyroscope. The
gyroscope is mechanically connected to the sphere to show attitude information. To
cage or uncage the instrument, the PULL TO CAGE knob is pulled and turned. When
the instrument is uncaged, the cage knob is turned to adjust the pitch reference.
Standby Attitude Indicator
Figure 11-29
2 000
2
3
4
ALT
0
7 3
2
1
4
9
6 2992
5
1014
mb/hPa in Hg
Altitude Pointer and Scale
Pointer indicates altitude in
100-foot increments as read
from scale. Full circle for
each 1,000 feet of altitude.
Altitude Counter
Indicates barometric altitude
from - 1,000 to 50 000 feet,
in 1,000 foot increments.
Barometric Pressure
Indicators
Indicates selected barometric
pressure as expressed in
hectopascals or inches of
mercury.
P604_11_020
Barometric Set Knob
Used to change
barometric pressure
values as read at hPa/in Hg
readouts.
Range for this standby
Instrument is as follows:
from 952 to 1049 mb/hPa
and
from 28.02 to 30.99 in Hg.
PU
LL
TO
CAGE
CLI MB
DI VE
OFF
Roll/Sky Pointer
Indicates bank angles
referenced against
index.
roll
Roll Scale and Index
Markings at 10, 20, 30,
45 and 90 degrees.
Sphere
Indicates airplane movement in pitch.
Marked at 5-degree increments
Fixed Airplane Symbol
Indicates roll and pitch
attitude relative to the
horizon.
Power Off Flag
Appears when power to
indicator is lost or
during gyro failure. Gyro
will continue to run for
approximately 9
minutes after power is
lost.
Horizon Line
Caging/Pitch -
Adjust Knob
P604_11_021
FLIGHT INSTRUMENTS
For Training Purposes Only
May 03
11-49
P I LOT T R A I N I N G GU I D E
Standby Compass
The standby magnetic compass is a self-contained dry unit, which uses eddy current
damping to prevent overshooting. The standby compass is installed below the
overhead panel.
Standby Compass
Figure 11-30
N
33
30
W
24
21
S
15
12
E
6
3
TO FLY
STEER
N 30 E 120 W
Fixed Airplane
Symbol
Compensating
Screws
Rotating Compass Dial
Magnetic Compass
Indicates heading of
airplane in relation to
magnetic north.
P604_11_022
60 150 S 210 240 300 330
STANDBY COMPASS WITH ALL RADIOS ON SWUNG BY
FLIGHT INSTRUMENTS
11-50 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
Aircraft Clocks
The digital clocks are located on the side panels of the pilot and copilot.
The clocks can display local time, flight time and elapsed time.
Starting with A/C 5331, the clocks have been changed to add a GMT time display.
Clock Prior to A/C 5331
Figure 11-31
P604_11_026
TIME DAVTRON ZERO
UP D B
SET DIM
E.T. RUN
stop
F.
T.
1hr
up
Set Switch
UP
D
Sprung to center position.
Hold to left ( ) position
advances clock 1 second
for every second held.
Hold to right ( ) position
retards clock 1 second for
every second held.
Time Switch
TIME
F.T.
E.T.
Select to display
local or standard time.
Select to display
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