Honeywell BENDIX/KING KLN 94 - Manual (Page 80)

B
KLN 94
Rev. 4, Jan/2003 10599I04.CDL Page 2-76
Verify that the TO/FROM flag is indicating FROM. Verify that the nav flag is pulled from view.
Verify that the selected course from the CDI/HSI is interfaced properly to the KLN 94 in the OBS
Mode. The OBS value on the third line of the self-test page should match the selected course on
the CDS/HSI and be with satellite coverage or in take-home mode.
You must create an active waypoint on the Flightplan 0 page to check the following function. The
OBS/LEG selection is controlled through the OBS button located on the front panel of the KLN
94. Pressing this button toggles between DTK and OBS with the normal position being DTK.
During OBS mode, the DTK indication (located left of the vertical page divider) will change to a
three digit course value.
Verify that the selected course value agrees with the value displayed on the HSI Course Pointer.
Change the selected course value on the HSI or CDI using the OBS knob. Verify that the selected
course value displayed on the KLN94 tracks the new value selected. In the OBS mode with the
GPS displayed on the CDI/HSI, the resolver is disconnected from the NAV converter. Verify that
the KNS 80 or 81 groundspeed is still functional and the Radial display for the KX 165 or KNS 81
is still functional. These units must have jumpers or resistors across them when the resolver is
removed.
In the OBS mode with the GPS not displayed on the CDI/HSI, the resolver is reconnected to the
NAV converter. Verify that change in the OBS resolver will not affect the selected OBS on the
KLN 94.
2.4.4.3 Gray Code Altitude Inputs
With gray code altitude being supplied by a compatible encoding altimeter, verify that the proper
altitude is indicated on the ALT page (provided no other altitude sources are active and that
proper baro setting has been entered).
Verify that there is no interference between the KLN 94, transponder, and any other loads on the
encoding altimeter output. Remove power from each of the loads on the encoder to verify that the
remaining equipment still performs properly. If interference exists, one or more of the units are
not diode isolated and isolation diodes will need to be added to the aircraft wiring.
2.4.4.4 RMI Interface
Cycle power on the KLN 94 which will cause the self test page to be displayed. Verify that the
RMI indicates 130°.
2.4.4.5 ELT Interface
The following test must be conducted within five minutes after the hour with ELT transmissions
limited to 3 (Three) sweeps. A sweep occurs each time there is a voice transmission. Verify that
the present position is displayed on the KLN 94 Nav 2 page. Activate the Comm Receiver and
tune it to 121.5 MHz. Switch the ELT cockpit toggle switch to TEST. The ELT light should flash
and the “sweeping” sound of the ELT should be heard on the Comm Receiver.
Within 1 (one) minute, a voice transmission should be heard which contains the present position
displayed on the KLN94 Nav 2 page. Switch the toggle switch to AUTO and push the reset button
until it stops flashing.