OPERATOR’S MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
3. If the track angle error relative to the intercept course is greater than 90-degree, and the aircraft present
position is past the abeam point to the intercept fix, the FMS displays the “NOT ON INTERCEPT TRK”
message and will not engage the LNAV AP/FD mode.
When the “NOT ON INTERCEPT TRK” message is displayed, the FMS is no longer in Track/Heading Hold
mode, and aircraft automatic guidance is controlled by the normal AP/FD modes. However, if LNAV is
disengaged and a new track/heading is established to intercept the course, re-engaging LNAV will cause
the FMS to return to Track/Heading Hold mode using the new aircraft track/heading.
If the FMS LNAV discrete is not configured, the information regarding the AFCS (Auto Flight Control System)
LNAV status is sent through other means to the FMS. When the FMS receives this information the roll
command output value changes to compute the value required to intercept the angle (value which was frozen
at the moment the AFCS LNAV switch was pressed).
B. When configured to remain wings level, the FMS keeps the roll command to a zero value until initiating the
turn to capture the intercept leg.
In configurations where LNAV input is not available, if the intercept is not achievable or a "direct to fix" mode
has been initiated, the FMS continues to monitor the conditions for a valid intercept. If a valid intercept is
detected, the FMS resumes the normal intercept procedure.
In configurations where LNAV input is available, at any time prior to initiation of the inbound turn, the action
of disabling the LNAV input, selecting a new heading, and re-enabling the LNAV input will cause the FMS to
set roll command to the IRS/AHRS bank angle until the inbound turn is initiated once again.
Page 9-6
August 17, 2010
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