Esterline CMA-9000 - Page 479

OPERATOR’S MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
SYSTEM ALERT
MESSAGE DESCRIPTION ACTION
CLB PATH
UNACHIEVABLE
1. The FMS predicts that the predicted
flight path angle or the climb rate
exceeds the envelope limit.
2. The computed climb path violates at
least one altitude-constrained climb
waypoint.
Review the climb vertical profile on the MCDU
and identify the excess flight path angle, climb
rate or the violated altitude constraint.
Adjust the climb profile to resolve non-
compliances.
COUPLED LNAV/VNAV
LOST
The FMS has detected a loss of
communication with both AFCS or
neither AFCS1 nor AFCS2 are
identified as master autopilot.
Advise maintenance.
COUPLED VNAV LOST
The FMS has detected a lost of
communication.
The AFCS preselected altitude input is
no longer being received by the FMS.
Use another vertical guidance mode.
Use another vertical guidance mode. Check the
connection between the AFCS and the FMS.
COURSE CHANGE >
125
The upcoming fly-by leg transition (from
active leg to the next leg) involves a
course change greater than 125
degrees.
Ensure that this is the intended lateral path. If
yes, monitor guidance to the next leg. Expect
S-turn in capturing the next leg.
CRZ ALT ABOVE MAX
ALT
The pilot-entered Cruise Altitude is
greater than the FMS-computed
Maximum Altitude;
OR
The stabilized selected altitude is
raised above the FMS-computed
Maximum Altitude and forces a change
to the FMS CRZ ALT;
OR
An engine-out situation occurs and the
current aircraft altitude is above the
FMS-computed Stabilizing Altitude.
Enter on the MCDU a cruise altitude below the
maximum altitude displayed on the cruise
page;
OR
Lower the pre-selected altitude below the
maximum altitude displayed on the cruise
page;
OR
The crew must evaluate the engine out event;
if it is judged as an engine-out non-critical
situation, lower the pre-selected altitude to the
stabilized altitude.
If the engine out event is critical, do not lower
the pre-selected altitude and monitor the
minimum rate of descent drift down.
CRZ ALTITUDE
LOWERED
When the cruise altitude must be
lowered to generate a climb profile to
the cruise altitude.
Verify the lateral and/or vertical flight plan and
correct accordingly.
If no changes are made, the message will be
removed when leveling of in cruise.
DATABASE OUT OF
DATE
Navigation Database selected is not the
current cycle.
Select correct database or advise maintenance
crew to load current database cycle.
DES PATH
UNACHIEVABLE
Upon flight plan execution:
1. The FMS calculates that the
predicted flight path angle or the
descent rate exceeds the
performance envelope limits.
2. The computed descent path
violates at least one altitude-
constrained waypoint within 50 nm of
T/D.
Review the descent vertical profile on the
MCDU; Identify the offending flight path angle,
descend rate or the violated altitude constraint.
Adjust the descent profile to resolve all non-
compliances.
Page E-4
August 17, 2010
DRAFT