Thales FMGS - FMS Erroneous Predictions

FMS DEGRADED OPERATION
OTHER DEGRADED OPERATIONS 1
Chapter 4 - OTHER DEGRADED OPERATIONS
4.1. FMS erroneous predictions
When FMS predicted values seem erroneous:
Both FMGC................ Compare
 If value are similar on both sides:
− Check for erroneous PILOT INPUT data such CRZ FL, CRZ TEMP,
ZFW,
− Check for erroneous SENSOR INPUT, such FUEL, SAT.
 If value are different on both sides:
− Re-enter Cost Index, which will restart a FMS computation, or
− Make a DIR-TO the TO WPT.
AIRBUS A318/319/320/321
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