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CSP A--013
MASTER
D. Standby Magnetic 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. The compass can be illuminated by operating the
standby compass switch on the miscellaneous lights panel.
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.
REV 56, Jan 31/03
Vol. 1 12--60--8
FLIGHT INSTRUMENTS
Standby Instruments and Clocks
Flight Crew Operating Manual MASTER
CSP A--013
Standy Magnetic Compass
Figure 12---60---6
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--9
REV 56, Jan 31/03
FLIGHT INSTRUMENTS
Standby Instruments and Clocks
Flight Crew Operating Manual
CSP A--013
MASTER
E. Clocks
Effectivity:
S Airplanes 7002 to7672
A digital electronic clock is installed on the pilot and copilot side panels. Each clock
contains its own time base and each has GMT, CHR, local and ET functions. The clocks
are the time base source for the aircraft avionics equipment. The clocks receive
air/ground information from the PSEU to control the elapsed time function (flight time).
The Pilots clock is powered from the DC battery bus and the copilots clock is powered
from DC bus 2. In the event of a power failure, both clocks will be powered by the main
battery direct bus. Current time is also displayed on the multifunctional displays.
Effectivity:
S Airplanes 7673 and subsequent
A digital electronic clock is installed on the pilot and copilot side panels. Each clock is
capable of displaying date (GPS or internal 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.
REV 56, Jan 31/03
Vol. 1 12--60--10
FLIGHT INSTRUMENTS
Standby Instruments and Clocks
Flight Crew Operating Manual MASTER
CSP A--013
Clock Display <Airplanes 7002 to 7672>
Figure 12---60---7
Time Setting/Display Selector
Used in conjunction with
ET/CHR buttons to set
applicable readouts.
SET cycles through GMT,
LOC and day/month/year.
GMT/LOC/DATE displays time
or date at upper readout.
Time/Date Display
Displays Greenwich
mean time, local time or
date.
GMT is displayed in
hours and minutes.
LOC is displayed in
hours and minutes.
Date; alternately indicates
month/day on
the GMT display (for
first second) and year
(for next second).
DATE alternately
displays month/day
(for first second) and
year (for next second).
ET/CHR Display
Displays elapsed time
or chronometer time.
ET time is displayed
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