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“STD” is then displayed, in place of the pressure value.
Pressing the knob again will display the selected barometric pressure.
(4) Altitude bug
When an altitude bug is entered through the bugs function, the corresponding altitude mark is
indicated by a cyan dash, or by a cyan box when the dash covers the digital indication on the
scale.
LANDING SYSTEM FUNCTION
Applicable to: ,
(1) Localizer scale and index
(2) Glideslope scale and index
The deviation scales appear when the LS pushbutton is pressed. The indexes appear when the
Glideslope and Localizer signals are valid and deviation scales are displayed.
(3) LS selection pushbutton
Pressing the LS pushbutton will display the ILS scales. Pressing it again will de-select the ILS
scales.
CAUTION Do not use the ISIS LS for takeoff, using the localizer of the opposite runway,
or for a back-course localizer approach. The LOC deviations are given in the
wrong sense.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ISIS
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BUGS FUNCTION
Applicable to: ,
(1) BUGS function selection pushbutton
Pressing the BUGS pushbutton will activate the BUGS function, and display the bug values to
be selected.
(2) SPD BUG and ALT BUG columns
The SPD BUG column gives four speed values (in knots) that can be selected by the crew.
The ALT BUG column gives two altitude values (feet) to be selected by the crew.
(3) BUGS value selection knob
It allows the bug value to be set by rotating the BARO knob. This value cannot be lower than
30 kt for a speed bug, or a negative value for an altitude bug.
Pressing the BARO setting knob, once a bug value box is activated, will deselect the bug value.
The "OFF" label comes on close to the activated box.
The entered values are memorized by the system, when exiting the screen, by pressing the
BUGS pushbutton (1), or after 15 s without any pilot action.
(4) "+"/"-" box activation buttons
Access from one box to another is obtained by pressing the "+" or "-" pushbutton.
When a bug value is entered, access to the next box is obtained by pressing the "-"
pushbutton. The box becomes active and flashes.
The "+" pushbutton can be used to return to a previous box.
Note: Use of the ISIS bugs function is not recommended because, in the event that both
PFDs are lost in flight, when the ISIS bugs were previously set for takeoff, then for the
approach, the bugs would remain at the takeoff characteristic speed settings.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ISIS
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FCOM 19 AUG 10
FLAGS
Applicable to: ,
(1) ATT flag (red)
When attitude data is lost, the red ATT flag appears.
(2) SPD flag (red)
When airspeed data is lost, the red SPD flag appears.
(3) M flag (red)
When Mach number is lost, the red M flag appears.
(4) ALT flag (red)
When altitude data is lost, the red ALT flag appears.
(5) G/S flag (red)
When glideslope information is lost, the red G/S flag appears.
(6) LOC flag (red)
When localizer data is lost, the red LOC flag appears.
(7) ATT : RST (yellow)
This message appears, when excessive aircraft movement is detected during the alignment
phase, or after 350 h of continuous electrical supply. In this case, press the ATT reset
pushbutton to realign and recover the attitude indication.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ISIS
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FCOM 19 AUG 10
(8) MAINT flag (white)
Failure, not affecting ISIS operation. Service ISIS, when convenient.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
ISIS
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A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
NAVIGATION
RADIO NAV - TUNING
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GENERAL
Applicable to: ALL
The FMGC is the basic means for navaids tuning.
Three tuning modes are available.
AUTOMATIC TUNING
Applicable to: ALL
In normal operation, the FMGC automatically tunes navaids automatically, with each FMGC
controlling its own receiver.
If one FMGC fails, the remaining one controls both sides receivers, after activation of the FM selector
switch.
MANUAL TUNING
Applicable to: ALL
The crew can use the MCDU to override the FMGCs’ automatic selection and tuning of navaids, and
　
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