BendixKing SG 465 System EFS 50 - Manual (Page 43)

EHSI Operation
2.1.8 Issued 4/95 SW 06/07/08/11
When the map range on the
MFD or pilot’s EHSI no longer
matches the range selected on
the copilot’s EHSI the copilot
will display stale weather infor-
mation for 30 seconds. A “WX
FLT” warning will then display
on the RADAR fault warning
line alerting the pilot of range
mismatch.
TST/REF
The TST/REF button performs
three functions: SELF TEST dis-
play, Ground speed or Time-to-
Station selection and LNAV MAP
formatting.
◗ TST -
To display the EHSI system
SELF TEST, press and hold the
TST/REF button for three sec-
onds. Upon entering Self Test, a
test pattern will be displayed. In
the center of the test pattern,
either a SELF TEST PASS or
SELF TEST FAIL will be annun-
ciated. With 06 software, the
SELF TEST display will remain
until the TST/REF button is
pressed again. Beginning with
07 software, the EFIS will cancel
the test mode and return both the
EADI and EHSI to normal opera-
tion after 5 seconds.
Note: If the SELF TEST FAIL
message is annunciated, the
system should be serviced.
◗ REF GROUND SPEED or
TIME-TO-STATION selection
With software 06 and 07, the
TST/REF button allows alternate
selection of Ground speed or
Time-to-station (in minutes) as
calculated by the selected prima-
ry NAV system. When Ground
speed or Time-to-station informa-
tion is available it will be dis-
played below the distance infor-
mation in the upper right corner
of the display. If the information
is not provided, the associated
annunciator will be removed.
The alternate selection of Ground
speed and Time-to-station will
not be allowed in the MAP mode
with an LNAV selected as the pri-
mary navigation source.
After software 08, both ground
speed and Time-to-station are
displayed simultaneously. Time-
to-station is displayed immediate-
ly below the Ground speed using
the format of hours and minutes
seperated by a colon (H:MM).
Note: The Time-to-station field
used with software 08 can also
be used for an abnormal DME
annunciation which has priority.
The EFS 50 will calculate ground
speed and Time-to-station in
installations which use an ARINC
568 type DME. If a conventional
DME indicator is also used, dif-
ferences in ground speed and
Time-to-station display may be
notices.
SYS REF