Honeywell Bendix/King KFD 840 Primary Flight Display
Miscellaneous Data Area KFD 840 PG PN 7450-0840-01
9-2 Rev C May 28, 2010
© Honeywell International Inc. Do not copy without express permission of Honeywell
Ground Speed
Ground Speed, GS, is displayed in the lower
left portion of the PFD in knots/miles per hour, with a resolution of 1
kt/mph. Speeds between 00 and 999 kts/mph are displayed in white
with a trailing gray KTS or MPH label. If the ground speed data is
invalid, the ground speed digits are removed.
True Airspeed
True airspeed, TAS, is displayed in the lower
left corner of the PFD in kt/mph (same as the units of the indicated
airspeed), with a resolution of 1 kt/mph. This true airspeed is
calculated based upon the indicated airspeed. To obtain the most
accurate value of true airspeed correct the indicated airspeed to
calibrated airspeed using the aircraft AFM/POH airspeed corrections,
if available, then calculate the true airspeed. Speeds between 30
and 999 kts/mph are displayed in white with a trailing gray KTS or
MPH label. If TAS data is invalid, the true airspeed digits are
removed and the standard rate of turn indicator will be removed from
the display.
Outside Air Temperature
Outside air temperature, OAT, is shown in the
lower right corner of the PFD in degrees Celsius or Fahrenheit with a
resolution of 1° is selectable by the pilot on the on the CONF page .
A minus (-) sign to the left of the temperature readout indicates
below zero readings. Temperatures between -70° Celsius and +50°
Celsius or -94° Fahrenheit to +122° Fahrenheit are displayed in
white with a trailing gray C or F label. If OAT data is invalid, the OAT
digits are replaced with amber dashes. If OAT is invalid TAS will also
be invalid and the standard rate of turn indicator will be removed
from the ADI display.
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