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H15
Copilots
S
AHRS 2
p H14
System
ATT/HDG 2 MAIN BAT
DIR 5 A9
Inertial
Pilots System
ATT/HDG 1 MAIN BAT
DIR 5 A8
Reference
IRU 1 AC ESS 3 C2
System (IRS)
0025 Copilots
IRU 2 AC BUS 2 2 B14
<0025> System ATT/HDG 2 MAIN BAT
DIR 5 A9
REV 56, Jan 31/03
Vol. 1 12--50--16
FLIGHT INSTRUMENTS
Attitude and Heading Reference System
Flight Crew Operating Manual MASTER
CSP A--013
THIS PAGE INTENTIONALLY LEFT BLANK
Vol. 1 12--60--1
REV 56, Jan 31/03
FLIGHT INSTRUMENTS
Standby Instruments and Clocks
Flight Crew Operating Manual
CSP A--013
MASTER
1. STANDBY INSTRUMENTS AND CLOCKS
A standby attitude indicator and a standby altimeter/airspeed indicator is located between
the EICAS displays on the center instrument panel. A standby compass is located below
the center of the overhead instrument panel. A clock is installed on both the pilot and copilot
side panels.
An integrated standby instrument is located between the EICAS displays on the center
instrument panel. A standby compass is located below the center of the overhead
instrument panel. A clock is installed on both the pilot and copilot side panels. <0083>
A. Standby Attitude Indicator
The standby attitude indicator displays aircraft pitch and bank angles. It is a 28 VDC
driven gyro that provides pitch and roll information for at least nine minutes after a
power failure. It also serves as a standby ILS indicator to provide localizer and
glideslope indications.
B. Standby Altitude/Airspeed Indicator
The standby altimeter/airspeed indicator displays barometric altitude from --1000 to
+50,000 feet (±20). A BARO set knob is provided. The standby airspeed portion of
the indicator displays non--corrected indicated airspeed from 60 to 450 knots
(±3 knots).
C. Integrated Standby Instrument <0083>
The integrated standby instrument (ISI) provides standby attitude, altitude and airspeed
information to the flight crew. To retain full operational capability under emergency
conditions the ISI is powered by the battery bus. The ISI uses inputs from the alternate
pitot probe and static ports.
The ISI displays the following information:
S Attitude display
S ILS deviation
S Altitude display (corrected)
S VMO display
S Airspeed display
S Static source error correction (SSEC)
S Mach number
S Barometric pressure
S Slip-skid indication
REV 56, Jan 31/03
Vol. 1 12--60--2
FLIGHT INSTRUMENTS
Standby Instruments and Clocks
Flight Crew Operating Manual MASTER
CSP A--013
Horizon Line
TO
Roll Scale and Index
Markings at 10, 20,
30, 45 and 90
Roll/Sky Pointer degrees.
Indicates bank angles
referenced against roll
index.
Glideslope Flag
When in view, indicates
selected signal is not
reliable or not present.
Glideslope Pointer
Indicates position in
relation to the
glideslope path.
Localizer Pointer
Indicates position in
relation to localizer
beam.
Localizer Fail Flag
When in view, indicates
selected signal is
unreliable or not
present.
Slip/Skid Indicator
(inclinometer)
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.
Sphere
Indicates airplane
movement in pitch.
Marked at 5--degree
increments.
Standby Attitude Indicator (1)
Center Instrument Panel
Standby Attitude Indicator
Figure 12---60---1
Vol. 1 12--60--3
REV 56, Jan 31/03
FLIGHT INSTRUMENTS
Standby Instruments and Clocks
Flight Crew Operating Manual
CSP A--013
MASTER
Standby Altitude/Airspeed Indicator
Figure 12---60---2
ALT
0 .300
0
5
1
2
3
6 4
7
9
0
1021 3015
120 150
BARO
NOTE
Normal operation of standby altimeter/
indicated airspeed indicators is vibrator
on. (circuit breaker CBP 1--1P2 closed).
Altitude Pointer and
Scale
Pointer indicates
altitude in 100--foot
increments as read
from scale. Full circle
for each 1,000 feet of
altitude
HPA/IN HG Readouts
Indicates selected barometric
pressure as expressed in
Hectopascals and inches of
mercury.
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