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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
17-69). 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
• Active database selection
• Fix entries
• Deselection of navaids
• Performance mode selection
• MAG / TRU display mode
• Thrust management
Parameters that are not synchronized include:
• FMC position initialization
• Selection of left / right 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 604” Pilot’s Guide.
NAVIGATION SYSTEMS
For Training Purposes Only
May 03
17-101
P I LOT T R A I N I N G GU I D E
Controls and Indicators
FMS Tune Inhibit
The FMS may be inhibited from tuning the radios by selection of the FMS TUNE
INHIB switch/light located on the Reversionary/Inhibit panel.
FMS TUNE INHIB Switch/Light
Figure 17-68
P604_17_050
INHIBIT PUSH
1-RTU-2 FMS TUNE
1 2
AFCS
SEL
STBY
1 2
ATC
SEL
FMS
TUNE
INHIB
RTU 1
INHIB
RTU 2
INHIB
FMS Tune Inhibit
Switch/Light
FMS TUNE INHIB Light
- Disables radio tuning from
FMS CDU
Illuminates when FMS auto tune inhibit
selected
NAVIGATION SYSTEMS
17-102 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
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
the position 1 or 2 respectively.
FMS 3 Reversionary Selector
Figure 17-69
P604_17_097
L IRS R IRS FMS3
1 2
NORM
NORM ALTN NORM ALTN
NAVIGATION SYSTEMS
For Training Purposes Only
May 03
17-103
P I LOT T R A I N I N G GU I D E
FMS Message Displays
The FMS messages are displayed in several locations. Typically, a message remains
displayed as long as the condition that generated the message persists. For a complete
description of messages and message categories, see the “Collins FMS-6000 for the
Challenger 604” Pilot’s Guide.
CDU Messages
Messages may appear in the scratchpad or in the message line immediately below the
scratchpad. Selection of the MSG function key cycles the CDU display to a dedicated
message page, where new and old messages may be reviewed.
CDU Message Display
Figure 17-70
P604_17_094
MSG EXEC
POS BRT
TITLE LINE 1/3
PRED RAIM
NONE
GPS NOT AVAILABLE
FMS NAV INVALID
FMS INDEPENDENT OP
XTALK FAIL
ETA
R1
DEST
L
MESSAGES 1/1
[ ]
INITIALIZE POSITION
ATC 1 ATC 2
AVAIL
MSG
NEW MESSAGES
OLD MESSAGES
MSG EXEC
POS BRT
AUTO/INHIBIT
>
>
>
RW06R
YUL
YOW
373.0
SEQUENCE
R
E
R
R1
COM 1
331°
ADF 1
L
ACT LEGS 1/1
[ ]
<RWY UPDATE
AUTO/MAN
373.0
NAV 2
ADF 2
LEG WIND>
279°
13NM
INVALID DELETE
MSG
82NM
AUTO/INHIBIT
AUTO/INHIBIT
CDU Messages Line Scratchpad Message
CDU MESSAGES PAGE
NAVIGATION SYSTEMS
17-104 For Training Purposes Only
Jan 04
P I LOT T R A I N I N G GU I D E
PFD Messages
FMS messages also appear on the PFD, immediately under the NAV SOURCE display
(when FMS is the NAV SOURCE). Additionally, certain PFD messages may be
displayed in the center of the HSI.
PFD Message Display
Figure 17-71
N
33
S
15
12
E
6
3
N
33
S
15
12
E
6
3
20
10
10
20
2
R
T
160
140
120
100
800
700
600
500
400
RWY
ADF1
29.96 IN
1/2BNK LNV1 DR VGP
AP
1
2
4
1
2
4
0.7
128
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