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FMS interfaces with the EFIS displays to provide conventional navigation information, state-of-the art map presentation, performance and optional Vspeed data.
Refer to the Rockwell Collins Pro Line 21 Avionics System Challenger 300 Operator’s Guide for a detailed description and operation of the flight management system. Included in the operator’s guide is their website to obtain the latest performance database updates from Rockwell Collins Inc.
CONTROL DISPLAY UNIT (CDU)
EXEC
MSG
DEP
MFD MFD MFD
DIR FPLN LEGS
PERF
PREV NEXT
ARR
MENU ADV DATA
A BC D E F G 1 2 3 CLR DEL
IDX
H I J K L M N 4 5 6 BRT
DIM
TUN
O P Q RS T U 7 8 9
V W X Y Z SP / . 0/ +/
Sep 13/2004 Flight Crew Operating Manual Volume 2 REV 1 CSP 100-6
17-01-33 FLIGHT MANAGEMENT SYSTEM (FMS) (Cont)
COMPONENTS AND OPERATION
DEAD RECKONING (DR)
When no navigation sensor data is available for the FMS to use, it begins navigating in the DR mode. In this mode, it esti-mates its position based only on the last known position, heading, and airspeed. To identify this mode, FMS DR is annun-ciated on the MFD and on the PFD if the NAV SOURCE is FMS. It also shows on the CDU message line and MESSAGES page.
FMS CALCULATED VSPEEDS (Optional)
The VSPEEDS function allows the pilot to set or adjust takeoff and approach speeds on the PFD, and show those reference speeds on the airspeed tape. FMS calculated VSPEEDS are an option on the aircraft.
The pilot can manually set the takeoff and approach reference speeds or adjust FMS calculated Vspeeds on the PFD with the REFS menu and display control panel (DCP). VSPEEDS are grouped on the REFS menu pages into takeoff speeds and approach speeds.
The pilot may accept the default or FMS calculated VSPEEDS value, or set a different value. The PFD show the reference speed as a digital readout on the speed reference table at the bottom of the airspeed tape. It also sets a reference bug for each separate VSPEED at the appropriate speed on the airspeed scale. Manually set VSPEED values show in cyan characters, FMS calculated VSPEEDS show in magenta characters. VSPEEDS can be a combination of FMS calculated and manually set values.
The FMS, however, does not compare actual aircraft data against the data manually input by the pilot on the CDU TAKEOFF REFERENCE or CDU APPROACH REFERENCE pages.
It is necessary for the pilot to verify and validate that the aircraft configuration and environmental conditions input into the FMS reflect the correct conditions for takeoff or approach.
After actual takeoff or approach configuration has been achieved, but before posting FMS computed VSPEEDS on the PFD, the aircrew should verify that the inputs that were entered into the FMS for computation of takeoff or approach performance reflect the actual or intended takeoff or approach conditions.
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