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A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ISIS
A330/A340 FLEET DSC-34-25 P 2/10
FCOM 19 AUG 10
ARCHITECTURE
Applicable to: ,
GENERAL
Applicable to: ,
The ISIS system displays the following information :
‐ Attitude
‐ Airspeed and mach
‐ Altitude
‐ Barometric pressure
‐ LS function
‐ Bugs.
Note: When leveling the wings, after performing a small turn of a small bank angle, the displayed
roll altitude may temporarily be incorrect by a few degrees.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ISIS
A330/A340 FLEET DSC-34-25 P 3/10
FCOM 19 AUG 10
(1) "+"/"-" activation pushbuttons
Two pushbuttons, labelled "+" and "-", are used to adjust the level of brightness.
This brightness of the screen automatically adjusts after power-up tests. This is because of the
photosensitive cell located on the surface of the ISIS system display.
The "+" and "-" pushbuttons then allow this initial brightness to be manually changed and
adjusted.
ATTITUDE
Applicable to: ,
(1) Fixed aircraft symbol
The fixed aircraft symbol is in black, and outlined in yellow.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ISIS
A330/A340 FLEET DSC-34-25 P 4/10
FCOM 19 AUG 10
(2) Roll scale
The roll scale is in white.
The markers are at 0 (small yellow triangle), 10, 20, 30, 45, 60 ° of bank.
(3) Roll index
The roll index indicates the bank angle. It is in black, and outlined in white.
(4) Lateral acceleration index
Lateral acceleration index indicates the aircraft’s lateral acceleration. It is represented by a
trapezoidal index that moves beneath the roll index.
(5) Pitch scale
The pitch scale indicates the aircraft attitude, and it is in white. The scale has markers every
2.5 ° , between 30 ° nose up and 30 ° nose down. If the pitch exceeds 30 ° , large (V-shaped)
red arrowheads indicate that the attitude is excessive. They also indicate the direction to follow,
to resume normal attitude. The minimum displayed pitch scale is -17.5 ° +15 ° at 0 ° of pitch.
(6) ATT RST pushbutton
Attitude indication is reset, by pressing “ATT RST” for at least 2 s. The aircraft must be
level during this procedure. During the reset time (approx. 10 s), the “ATT 10 s” message is
displayed on the screen. “ATT RST” is also used to realign the system, if excessive aircraft
movement is detected during the alignment phase, or after 350 h of continuous electrical
supply.
AIRSPEED
Applicable to: ,
(1) Airspeed scale
A white scale moves in front of a yellow triangle indicating the airspeed. The scale ranges from
5 to 250 kt, with a mark every 5 kt, and from 250 to 520 kt, with a mark every 10 kt.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ISIS
A330/A340 FLEET DSC-34-25 P 5/10
FCOM 19 AUG 10
(2) Mach Number
The Mach number is displayed in green, when greater than 0.5, but disappears only when it
goes lower than 0.45.
(3) Speed bug
When a speed bug is entered via the BUGS function, the corresponding speed mark is
indicated by a cyan dash.
ALTITUDE
Applicable to: ,
(1) Altitude indication
The altitude indication is given as a white moving scale, and a green digital readout on a grey
background.
The altitude scale ranges from -2 000 ft to 50 000 ft, every 100 ft, with digital altitude indications
every 500 ft.
For negative altitudes, “NEG” appears in the window in white.
The altitude box changes to cyan, when it also corresponds to a bug value.
The present altitude in meters is also displayed in green and is in a yellow-boxed digital
readout, located on the upper right-hand of the screen.
(2) Barometric reference
The barometric reference pressure is displayed in cyan, in hectoPascal (hPa) and in inches
of mercury (inHg). It corresponds to either the selected barometric pressure, or the standard
pressure. The barometric pressure ranges from 745 hPa to 1 100 hPa, and from 22 inHg to
32.48 inHg .
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ISIS
A330/A340 FLEET DSC-34-25 P 6/10
FCOM 19 AUG 10
(3) Barometric selection knob
This knob enables the selection of a barometric pressure, setting a variation of 10 hPa per
knob rotation.
The standard barometric pressure can be selected by pressing the barometric knob.
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 3(122)
