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management and cockpit management functions. Each FMC contains a navigation database,
which it uses to execute the active flight plan.
Integrated Navigation Solution
The integrated navigation solution is the FMS-calculated position of the aircraft, in latitude and
longitude. The FMCs receive data from all aircraft navigation sensors, and continuously
calculate the integrated navigation solution. GPS is normally the highest priority sensor used in
this position calculation, but a combination of DME/DME, VOR/DME, and IRS information is
also used, according to predetermined blending algorithms. The FMC rejects sensor data that
is not valid, and advises the flight crew of position determination errors through the CDU
message system.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−80
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
FLIGHT MANAGEMENT SYSTEM (FMS) (CONT'D)
Flight Plan Tracking
By comparing the integrated navigation solution to the navigation database and the active flight
plan, the FMC calculates and displays the aircraft’s position relative to the flight plan routing,
and issues steering commands to the flight control computers to track the lateral and vertical
components of the active flight plan.
Data Base Unit (DBU)
The data base unit (DBU) is a panel-mounting data loader with a disk drive, that is used with the
FMS system and the maintenance diagnostic computer. The FMS system uses the DBU to load
database updates from diskettes into the FMS computers. The integrated avionics processing
system (IAPS) maintenance diagnostic computer uses the DBU to upload maintenance tables
from diskette, or download maintenance data files to diskette. High-density and double-density
3-1/2 inch diskettes are acceptable. The unit has a “drive in-use” indicator and a disk eject
button.
The navigation database is loaded into each FMC individually through the DBU. Flight plans and
waypoints may also be loaded or stored on disk through the DBU.
An optional database loading kit (PCD-3000) is available. This kit allows simultaneous database
loading of up to three FMSs.
Data Base Unit
Figure 17−10−75
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−81
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
FLIGHT MANAGEMENT SYSTEM (FMS) (CONT'D)
Synchronized/Independent Operation
Dual-FMS system have provisions for operation in synchronized (SYNC) or independent
(INDEP) modes. By default, dual-FMS airplanes power up in SYNC, and triple-FMS airplanes
power up in INDEP mode.
In the triple-FMS configuration, the flight crew decides which two FMSs to synchronize. FMS 3
is selected using the FMS reversionary selector switch (see Figure 17−10−77). SYNC/INDEP
mode selections are made on the FMS CONTROL page of the CDU.
When two FMSs are synchronized, they share the following parameters:
• Flight plan edits;
• Performance initialization;
• Leg sequencing (based on NAV source selection);
• Active database selection;
• Fix entries on FIX INFO page;
• Deselection of navaids;
• Performance mode selection, fuel flow and ground speed entered on FUEL MGMT page;
• MAG/TRU display mode;
• Thrust management;
• Direct-to edits;
• Holding pattern data; and
• Enabling/disabling of VOR/DME from the navigation solution.
Parameters that are not synchronized include:
• FMC position initialization; and
• Selection and tuning of on-side sensors.
When the FMSs are operated in INDEP mode, all parameters must be manually entered in each
FMS.
For additional information about SYNC/INDEP operation, see the “Collins FMS-6000 for the
Challenger 605” Pilot’s Guide.
Controls and Indicators
FMS CDU Tune Inhibit
The FMS CDUs may be inhibited from tuning the radios by selection of the CDU 1 INHIB or
CDU 2 INHIB switch/light, located on the reversionary panel. The lights illuminate when CDU
auto tuning inhibit is selected.
NAVIGATION SYSTEMS
Description
Vol. 2 17−10−82
Oct 05/06
CL−605 Flight Crew Operating Manual
PSP 605−6
FLIGHT MANAGEMENT SYSTEM (FMS) (CONT'D)
FMS TUNE INHIB Switch/Light
Figure 17−10−76
FMS 3 Reversionary Selector
FMS 3 may be selected using the FMS 3 reversionary selector switch on the center pedestal.
FMS 3 replaces FMS 1 or FMS 2 when the rotary selector switch is moved to position 1 or 2
respectively.
FMS 3 Reversionary Selector
Figure 17−10−77
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庞巴迪挑战者605机组操作手册 CL605-NAVIGATION_SYSTEMS(26)
