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Anintegrated standbyinstrumentis locatedbetween theEICASdisplays onthecenter instrumentpanel. A standby compass is locatedbelowthecenterofthe overhead instrumentpanel. A clockis installed on boththepilotand copilot side panels.<0083>
A. Standby Attitude Indicator
The standbyattitudeindicatordisplays aircraftpitchandbankangles. Itis a28VDC driven gyro thatprovidespitch and rollinformation foratleast nine minutesafter a power failure. It also serves as astandbyILSindicatorto providelocalizer and glideslopeindications.
B. Standby Altitude/Airspeed Indicator
The standbyaltimeter/airspeedindicatordisplays barometric altitudefrom -
1000to +50,000feet(:20). ABARO setknobis provided. The standbyairspeedportion of theindicatordisplays non-
correctedindicated airspeedfrom 60to450 knots (:3knots).
C. Integrated Standby Instrument <0083>
The integrated standbyinstrument(ISI)provides standbyattitude,altitudeandairspeed information totheflight crew. To retain fulloperational capabilityunder emergency conditions theISIis poweredbythebatterybus. TheISI uses inputsfromthealternate pitotprobeand static ports.
The ISIdisplays thefollowinginformation:
W Attitudedisplay
W ILSdeviation
W Altitudedisplay(corrected)
W VMOdisplay
W Airspeeddisplay
W Static source error correction (SSEC)
W Mach number
W Barometricpressure
W Slip-skidindication
Flight Crew Operating Manual MASTER
CSP A-
013
Vol. 1 12-
60-
2
FLIGHT INSTRUMENTS
REV56,Jan 31/03
Standby Instruments and Clocks
Roll Scale and Index
Markings at 10, 20,
30, 45and90
Roll/Sky Pointer degrees.
Indicates bank angles
referencedagainst roll Sphere
index. Indicates airplane
Power OFF Flag
movement inpitch.
Appears whenpowerMarkedat 5-
degree
Glideslope Flag to indicator is lost or
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