Esterline CMA-9000 - Descent Trajectory Check; Transition to Descent Phase

OPERATOR’S MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
If a forecast local CAUTION: barometric setting value is not entered, a violation of altitude constraints may
result during the descent.
t to review the computed descent trajectory to ensure the consistency
leness of the FMS-computed descent profile and predictions.
V
.
approach has not yet been loaded, verify the E/D distance and height from the destination airport.
ILE page(s)
alies exist, as indicated by a speed or altitude field displayed in
3. PROGRESS 1/4 page
the Top-of-Descent.
NOTE: The T/D point shown on the PROGRESS page and the ND map display corresponds to the
cipation point, and the DES page
splayed, pressing the
-of-Descent anticipation point corresponds to:
DES page.
rtical path during
GCP VNAV push
button. The FMA displays ALT in green and VNAV is displayed in cyan. VNAV mode will engage when the
FMS switches into the descent phase of flight.
• When a deceleration is required, the FMS will transition to Descent mode as soon as the level deceleration
begins, however the FMS will only command a descent at the start of the vertical transition path.
• A CHECK SELECTED ALT message is raised at 10 nm prior to the T/D anticipation point if the selected
altitude is not at least 150 ft lower than the cruise altitude.
• Vertical Deviation relative to the descent path is displayed starting at the T/D anticipation point.
• The autopilot FMA transitions from ALT to VNAV when the VNAV mode engages. The auto-thrust FMA
indicates THRUST or SPEED depending whether the descent path is a performance path or a GPP path.
1.7.10 Descent Trajectory Check
Prior to initiating the descent, it is importan
and reasonab
erify the descent profile using the following pages:
1 DES page
If the
2. LEGS and PROF
Ensure that no waypoint constraint anom
Amber.
Verify the ETA and Distance to
interception of the descent path and the cruise altitude.
1.7.11 Transition to Descent Phase
The FMS automatically transitions to Descent mode at the Top-of-Descent anti
is automatically displayed if a VNAV page was previously displayed (if another page was di
VNAV key accesses the DES page).
The Top
• The start of the vertical transition path that captures the descent trajectory; or
• The planned deceleration point if a deceleration to the planned descent speed is required.
The vertical deviation pointer comes into view on the PFD and its numerical value on the MCDU
The vertical deviation error function is to indicate the airplane’s position relative to the ve
descent.
NOTES:
• When within 50Nm from the T/D, the crew must Arm the VNAV mode through the F
Page F-39
August 17, 2010
DRAFT