User's Guide

DRAFT
Page 4-11
17 Mar 2016
23-15-87
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781-500 SDU and SCM
© Honeywell International Inc. Do not copy without express permission of Honeywell.
C. Thermal Status
As shown in Figure 4-4, the SATCOM OVERTEMP menu reports the thermal status of system
components.
To check the thermal status, on the SATCOM BITE menu, press the button next to OVERTEMP.
Table 4-11 Bus Status Indicators
Bus
Status
INACTIVE NO DATA NONE OK
CFDS No labels of correct
speed on bus.
The expected Golden
label (227) is not
present.
The bus is not
installed.
The expected Golden
label is present and the
bus is active at the
correct speed.
CFDS The A781-500 does not support or receive input from the CFDS. Therefore the status will
always be NONE.
TCP No labels of correct
speed on bus.
The expected Golden
label (377) is not
present.
The secure ORT
parameter indicates
the bus is not installed.
The expected Golden
label is present and the
bus is active at the
correct speed.
IRS - PRI No labels of correct
speed on bus.
The expected Golden
label (310) is not
present, i.e. Label 310
or Label 254,
depending on ORT
selection.
N/A
(Primary IRS always
present on this
aircraft.)
The expected Golden
label is present and the
bus is active at the
correct speed.
IRS - SEC No labels of correct
speed on bus.
The expected Golden
label (310) is not
present.
The IRS2Type secure
ORT parameter
specifies whether it is
connected or not
connected.
The expected Golden
label is present and the
bus is active at the
correct speed.
GNSS No labels of correct
speed on bus.
The expected Golden
label (110) is not
present.
The secure ORT
parameter indicates
the bus is not installed.
The expected Golden
label is present and the
bus is active at the
correct speed.
AES ID No labels of correct
speed on bus.
The expected Golden
label (275) is not
present.
The secure ORT
parameter indicates
the bus is not installed.
The expected Golden
label is present and the
bus is active at the
correct speed.
CMU No labels of correct
speed on bus.
The expected Golden
label (270) is not
present.
The secure ORT
parameter indicates
the bus is not installed.
The expected Golden
label is present and the
bus is active at the
correct speed.
DRAFT as of
4 Mar 2016