BENDIX/KING
KCS 55/55A
Page 2-8
©Honeywell International Inc. Do not print without express permission of Honeywell
Rev 11, Apr/2007
The control wheel should stop moving when the marker reaches -10
o
. Center the
control wheel to midrange and observe there is no movement either clockwise or
counterclockwise.
The absolute value of the null position clockwise and counterclockwise from the
lubber line (nominally
±
10
o
) should be within two degrees of each other.
For Cessna Autopilots, the procedure for setting the HDG gain is the same as that
described above except for the controller settings which are as follows:
Pull-Turn Control Knob - Pushed in
Intercept - TRK-HDG - HDG
CRS: Set the attitude gyro for 0
o
of offset, turn on the autopilot and set it for the Course
Mode (Radio Coupler Selector switch set on OMNI). Acquire a VOR station on the
appropriate radio and when the KI 525/525A NAV flag disappears center the
Course pointer and deviation bar under the lubber line. Next, rotate the Course
pointer to +45
o
(clockwise from the lubber line by 45
o
) and adjust the CRS poten-
tiometer until there is no movement of the control wheel. Reposition the control
wheel to the center of its range and observe there is no movement of the control
wheel.
Next, check the setting of the CRS gain by slewing the Course pointer to -45
o
(counterclockwise from the lubber line by 45
o
) the control wheel should stop mov-
ing when the Course pointer reaches -45
o
. The absolute value of the two inter-
cepts (nominally
±
45
o
) should be within 5
o
of each other.
For the Cessna Autopilots, the procedure for setting the CRS gain is the same as
that described above except for the Controller Settings which are as follows:
Pull - Turn Control Knob - Pushed in
Intercept - TRK - HDG - Intercept
To check the Mitchell Century II & III Localizer operation, set the appropriate radio
to a Localizer frequency and the Radio Coupler selector switch to LOC. Rotate the
KI 525/525A Course pointer clockwise and note that the control wheel also rotates
clockwise. Change the Radio Coupler selector switch to LOC REV, rotate the
Course pointer clockwise and observe that the control wheel rotates in the opposite
direction, counterclockwise. The back course approach is flown with the course
pointer set to the front course to give proper deviation bar steering to the pilot.
NOTE:
When the KA 57 is coupled to a Mitchell Century II or
III and the system is operated incorrectly by select-
ing a Radio Coupler LOC mode with a VOR frequen-
cy selected on the Radio or a VOR Omni mode on
the Radio Coupler with an ILS frequency on the ra-
dio, the KA 57 Course Datum output will be 180 de-
grees out of phase.
RELEASED FOR THE EXCLUSIVE USE BY: AIRCRAFT ELECTRONICS ASSOCIATION
UP536434
