FMS DEGRADED OPERATIONS
CONTENTS 1
PART IV: FMS DEGRADED OPERATIONS
Contents
Chapter 1 - OVERVIEW.................................................... 1
Chapter 2 - FMGC RESETS AND FAILURES ....................... 1
Automatic Single Reset of one FMGC ............................ 1
Automatic Double Reset of one FMGC ........................... 4
Automatic Triple Reset of one FMGC ............................. 9
Automatic Single Reset of both FMGCs ....................... 12
Automatic Double Reset of both FMGCs ...................... 14
FMS re-initilization ..................................................... 17
DEGRADED MODES...................................................... 22
SINGLE mode ............................................................ 22
INDEPENDENT mode................................................... 23
Both FMGC failure....................................................... 25
MAP NOT AVAIL remains displayed on ND .................. 26
Chapter 3 - MCDU ANOMALIES ........................................ 1
3.1.
MCDU locked or blank ................................................... 1
FMGC (TIMEOUT) .......................................................... 2
Chapter 4 - OTHER DEGRADED OPERATIONS................... 1
FMS erroneous predictions ........................................... 1
FMS messages .............................................................. 2
FMS1/FMS2 A/C STS DIFF ............................................. 2
FMS1/FMS2 PGM PIN DIFF ............................................. 2
UNKNOWN PROGRAM PIN.............................................. 2
SENSOR IS INVALID ..................................................... 3
FMS1/FMS2 POS DIFF ................................................... 4
CHECK IRS1/FM POSITION ............................................ 5
CHECK IRS2/FM POSITION ............................................ 5
CHECK IRS3/FM POSITION ............................................ 5
NAV ACCUR DOWNGRAD ............................................... 6
IR ALIGNMENT IN ATT MODE ......................................... 7
Weights ........................................................................ 8
FMS1/FMS2 GW DIFF .................................................... 8
CHECK GW .................................................................. 8
INITIALIZE WEIGHTS.................................................... 8
AIRBUS A318/319/320/321
© THALES AVIONICS S.A.
J43126AA 00
Summary of Contents for FMGS
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