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Displayed when both localizer
and glideslope functions fail.
Localizer and glideslope
scales and pointers are
removed.
ATT Flag (red)
Displayed when an attitude
failure is detected.
Blue and brown background,
pitch and roll scales and
roll/sky pointer are removed.
ALT Flag (red)
Displayed when a
computation or display
malfunction is detected.
Altitude scale is removed.
IAS Flag (red)
Displayed when airspeed
cannot be computed or
displayed. Airspeed tape and
pointer are removed.
Standby Instrument
Center Instrument Panel
ALIGNING Flag
Displayed during
power--up and
initialization.
CAGE
+
_
BARO
STD
Standby Instrument
Center Instrument Panel
Vol. 1 12--60--5
FLIGHT INSTRUMENTS
Standby Instruments and Clocks Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
B. Standby Compass
The standby compass is independent and does not interface with other systems. It is a
self contained dry compass which uses eddy current damping to prevent overshooting.
A miniature aircraft pointer indicates aircraft heading in relation to magnetic north on a
rotating vertical compass card.
A compass correction card, mounted above the instrument, is used to record the values
that must be added to or subtracted from the compass indications to correct for the
influence of magnetic materials contained in the aircraft and magnetic fields from the
avionics systems near the compass. The compass can be illuminated by operating the
standby compass switch on the miscellaneous lights panel.
Standby Magnetic Compass
Figure 12---60---4
Standby Magnetic Compass
Windshield Center Post
Compass Correction Card
Used to record compass
instrument errors at the
headings indicated. The
errors are noted during a
compass ”swing” operation.
Magnetic Compass
Indicates heading of
airplane in relation to
magnetic north.
STANDBY COMPASS WITH ALL RADIOS ON SWUNG BY
TO FLY
STEER
N 45 E 135 S 225 W 315
Vol. 1 12--60--6
FLIGHT INSTRUMENTS
Standby Instruments and Clocks REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
C. Clocks
A digital electronic clock is installed on the pilot and copilot side panels. The clocks
have the capability of being synchronized with the Global Positioning System (GPS).
Each clock is capable of displaying date (GPS or internal Universal Time Coordinated
(UTC), current time (GPS, internal UTC, or local), chronometer (CHR), as well as
elapsed time (ET) functions. The clocks are synchronized to the GPS input as soon as
valid GPS information is received. In the case of invalid GPS data or signal loss, the
clocks will operate in internal (INT) mode using the integrated time base of each clock.
If there is a valid GPS signal, the clocks do not need to be set, as this will be done
automatically at power up. The flight crew can disable the the GPS signal by entering
the time setting mode. The clocks will then ignore the GPS signal until the next primary
power reset. The MODE, ET SEL and ET RST buttons are used to set the time and
date. To set the clock, push the MODE button for two seconds, then push the MODE
button again to toggle between UTC hours and minutes (when the INT is lit), year,
month, and day, (when the DT is lit), and local time hours and minutes (when the LT is
lit). In any of these modes, the ET SEL button is used to decrease the data and the ET
RST button is used to increase the data. Data changes are in increments of one digit
for each press of the ET SEL or ET RST button. At any time during the time setting
process, pressing the MODE button for a minimum of two seconds will exit the time
setting mode and restart the clock operation.
Vol. 1 12--60--7
FLIGHT INSTRUMENTS
Standby Instruments and Clocks REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Clock Display with GPS Synchronization
Figure 12---60---5
CHR
Used to start, stop and
reset the chronometer
display. Overrides
existing elapsed time
display.
ET RST
Used to reset the
elapsed time function
when the airplane is on
the ground.
Also used to increase the
data in one digit
increments during
manual setting of the
clock.
ET/CHR Display
Displays elapsed time
or chronometer time.
RST
SEL
ET
MODE
CHR
INT
CHR
Time/Date Display
Displays GPS time,
internal UTC time, local
time or date.
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