OPERATOR’S
MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
Page 16-2
November 19, 2009
TANDEM MODE (if TANDEM is configured)
The Tandem Mode consists of 2 FMSs namely the 'Trainer' and 'Student' FMS. The tandem mode implies that
the Trainer’s FMS will act as a MCDU and will be connected through the A739 protocol to one external
subsystem which is the Student FMS.
In the tandem mode, the trainer and student FMSs will display simultaneously: the current display page;
keystroke commands; scratchpad information and annunciators, with the exceptions of the radio volume control
(if configured) and display brightness settings. The trainer’s FMS will have access to both FMSs; his own and
the student. The student will only have access to his own FMS.
Any entry on the trainer’s FMS will result in a modification of the data on the student FMS. The trainer’s FMS
internal system is not affected by the entry. An alpha-numerical value entered in the scratchpad on any FMS is
appended to the scratchpad data that is already being displayed.
Tandem functionality is available either in independent or synchronized mode. When in independent mode and
Tandem is active, the trainer’s FMS will not have radio volume settings. The trainer’s FMS will initiate the
Tandem Mode when logging on into the student’s FMS. The trainer’s FMS will terminate the Tandem Mode
when logging off the student’s FMS.
When the Tandem function is configured, navigation sensor de-selections are cross-talked to the cross-side
FMS in order to de-select the navigation sensors from only one FMS. When Tandem mode is active (both FMSs
have the exact same display), the EFIS Center-Legs mode is cross-talked in order to have the same EFIS
display on both ‘Student’ and ‘Trainer’ EFIS.
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