I A P 2 0 2 3 . 0 0 1 - A F M / I R I S T E X A N I I P A G E | 139
FOR SIMULATION USE ONLY ā NOT A TRAINING AID
SPEED ADVISORY MESSAGE
The speed advisory message consists of the characters SPD in amber text,
displayed above the airspeed indicator. It indicates a miscompare error in the
airspeed readout, which occurs when the difference between the airspeed data
from the two IACs is 5 knots or more (or if one of the IACs reports valid data and
the other IAC does not).
AIRSPEED BUG
The airspeed bug consists of two parts; the airspeed bug setting readout and the
airspeed bug.
Both are displayed in magenta. The airspeed bug setting can be set or modified
using the up-front control panel by pressing the PFD key.
MACH NUMBER READOUT
The current Mach number of the aircraft is displayed as a digital readout with two
decimal places below the airspeed indicator scale. The Mach number readout
appears when the current aircraft Mach number is greater than 0.30, and turns red
when Mach 0.67 is exceeded.
Altimeter
The altimeter indicator differs from the vertical speed and airspeed indicators in
that the IAC receives pressure altitude from the ADC and calculates and displays to
baro-corrected altitude.
The altimeter, through a selectable function on the UFCP, can provide baro-set data
in either inches of mercury or millibars. The baro-setting is displayed on the PFD
below the altimeter scale and is controlled directly through the baro-set knob on
the UFCP or via keypad entry from the PFD menu on the UFCP.
Air data information is supplied to the altitude indicator on dual data buses. Power
is provided through a circuit breaker, placarded ADC, on the generator bus circuit
breaker panel in the front cockpit.
On the dial display, a 1000 foot range of altitude is displayed on the scale. Major
graduations are displayed every 100 feet and markings every 20 feet.
The current altitude in that range is indicated by a rotating pointer. On the tape
display, a 1000 foot range of altitude is displayed on the scale.
Major graduations are displayed every 200 feet and markings every 100 feet. The
scale moves up and down so that the current aircraft altitude is always aligned with
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