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RELEASED FOR THE EXCLUSIVE USE BY: AIRCRAFT ELECTRONICS ASSOCIATION
BENDIX/KING
A.
Place the aircraft on a North heading and rotate the compass card to NORTH with
the manual slave buttons. Place a non-magnetic blade screwdriver in the N/S
opening on the KA 51/51A and center the slave meter.
B.
Place the aircraft on an East heading and rotate the compass card to EAST with
the manual slave buttons. Place a non-magnetic blade screwdriver in the E/W
opening on the KA 51/51A and center the slave meter.
C.
Place the aircraft on a South heading and rotate the compass card to SOUTH with
the manual slave buttons. Place a non-magnetic blade screwdriver in the N/S
opening on the KA 51/51A and adjust the meter for one-half of the existing meter
deviation.
D.
Place the aircraft on a West heading and rotate the compass card to WEST with
the manual slave buttons. Place a non-magnetic blade screwdriver in the E/W
opening on the KA 51/51A and adjust the meter for one-half of the existing meter
deviation.
To achieve maximum accuracy of the system the index-error of the KMT 112 should be re-adjust-
ed per paragraph 2.8.3 above. All reading should be within
rose.
2.8.5
KA 51B
With the complete KCS 55A Compass System operating and the KA 51B in the "Free Gyro" mode,
position the aircraft on a compass rose. Remove the two mounting screws that secure the unit to
the panel and slide the unit out until the meter test jacks and compensator potentiometers are ac-
cessible. If the compensator assembly is remote mounted, gain access to the compensator po-
tentiometers. Connect a digital millivolt meter to the unit test jacks (common connection of the
millivolt meter to the black test jack of the KA 51B and positive connection of the millivolt meter to
the red test jack of the KA 51B). Adjust the compensation as follows:
A.
Place the aircraft on a North heading and center the compass card North under the
Lubber line with the CW/CCW switch. Place a non-magnetic blade screwdriver in
the N/S potentiometer in the KA 51B Compensator Assembly and zero the external
millivolt meter (0.0VDC
B.
Place the aircraft on an East heading and center the compass card East under the
Lubber line with the CW/CCW switch. Place a non-magnetic blade screwdriver in
the E/W potentiometer in the KA 51B Compensator Assembly and zero the exter-
nal millivolt meter (0.0VDC
C.
Place the aircraft on a South heading and center the compass card South under
the Lubber line with the CW/CCW switch. Place a non-magnetic blade screwdriver
in the N/S potentiometer in the KA 51B Compensator Assembly and adjust the ex-
ternal millivolt meter for 1/2 of the existing millivolt meter readout.
D.
Place the aircraft on a West heading and center the compass card West under the
Lubber line with the CW/CCW switch. Place a non-magnetic blade screwdriver in
the E/W potentiometer in the KA 51B Compensator Assembly and adjust the exter-
nal millivolt meter for 1/2 of the existing millivolt meter readout.
As a final check of the KCS 55A Compass System, position the aircraft on the compass rose and
turn to each of the four cardinal headings while the KCS 55A System is in the Slaved Gyro mode.
All readings should be within
secured to the aircraft panel. The alignment is complete.
Rev 11, Apr/2007
©Honeywell International Inc. Do not print without express permission of Honeywell
±
50mV).
±
50mV).
±
o
2
of those on the compass rose. The KA 51B can now be re-
±
2 degrees of those on the compass
KCS 55/55A
Page 2-5
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