B KRA 405
Rev 6, June 2003 IM 006-00104-0006.dwd Page 3-1
SECTION III
OPERATION
3.1 GENERAL
The KNI 415 and KNI 416 Radar Altimeter Indicators are shown in Figure 3-1 and 3-2
and are discussed below.
Altitude Scale: The KNI 415 scale gives accurate altitude indications from -20 to
+2000 feet. From -20 to 500 feet each mark on the scale repre-
sents 10 feet. From 500 to 2000 feet, each mark represents 100
feet.
The KNI 416 scale gives accurate altitude indications from -10 to
+2000 feet. From -10 to 200 feet each mark represents 5 feet,
from 200 to 500 feet each mark represents 20 feet, and from 500
to 2000 feet each mark represents 100 feet.
Indicator Needle: The AGL altitude in feet is displayed beneath this needle. Needle
will be clockwise behind mask when above 2000 feet.
Flag: Indicates invalid altitude information is being displayed or self test
button is depressed.
Self Test Button: This button is used to test the Radar Altimeter R/T and indicator.
When the button is depressed, the flag will come into view and 50
+/- 5 feet will be displayed.
DH Knob: This knob controls the DH (Decision Height) bug. By turning it
clockwise, the DH bug will increase in altitude; counterclockwise,
the bug will decrease in altitude.
DH Bug: Indicates altitude during an approach at which the DH lamp will
light.
DH Lamp: This lamp lights when the Decision Height is reached. The lamp
can be turned off by pushing the lamp in. The lamp can be turned
on again, when below the decision height, by depressing the lamp
a second time.
Once turned off, the DH lamp will be automatically armed upon
climb out as the aircraft passes through the DH altitude. Pressing
the self-test button will also turn on the DH lamp if the DH bug is
set above 50 feet.
3.2 NORMAL OPERATION
3.2.1 PREFLIGHT
RELEASED FOR THE EXCLUSIVE USE BY: AIRCRAFT ELECTRONICS ASSOCIATION
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