4. B.
(7) Configurations
When installed in an aircraft, the FMS may be configured with a
second FMS. There are four configuration states that the FMS may
exist
in: dual, initiated transfer, independent and single.
. Dual mode allows all active flight plan entries and performance
initialization data to be transferred to the off-side system
without the need for a separate pilot action.
● Independent mode exists only when two systems are installed. In
this mode only off-side tuning information is transferred between
systems.
. Initiated Transfer mode is applicable only when two systems are
installed. In this mode off-side radio tuning commands and pilot
defined database entries are transferred automatically. Active
flight plan and performance initialization data are transferred
only on command either through an aircraft mounted switch or via
a line select key prompt on the last page of the active flight
plan.
● Single is the configuration of a single FMS system or a default
mode when two systems in a duplex installation are not
communicating with the offside FMS.
~: Some installations have three (3) FMS systems installed.
However, the third FMS interfaces with the total
integrated system as a hot spare.
The FMS will operate in dual or initiated transfer modes only when
the following criteria are met:
. Both systems must have the same software version (SW PROGRAM).
c Both systems must have the same navigation database region and
effective dates (NAV DB and DB CYCLE).
● Both systems must have the same programming pin configurations
(CONFIG PIN).
● Both custom databases must be identical (CUSTOM DB).
● Both FMSS must have the same present position with a 10 NM
tolerance (PPOS DIFF).
● Both FMSS must be in agreement as to the master-slave
relationship (SLAVE).
The parenthetical information above will be displayed on the CONFIG
PROBLEMS page if the system is not operating in the mode for which
it has been configured.
22-14-00
I
Page 298.166
Apr 15/93
Use or disclosureof information on thispage issubject to the restrictions on the title page of this document.
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