Fuel Control and Monitoring Computer
Also from: FCMC
There are 2 FCMCs. FCMC 1 is normally the active computer and controls fuel transfers, although both computers are used for quantity indications.
The inputs to the system are:
- ADIRS, for aircraft attitude
- FCDC, for THS position
- LGCIU, for landing gear up/down and flight/ground signals
- SFCC, for slats extended
- MCDU data, for initial values
Failures
If both FCMCs fail, a backup system in the FEs is used for gross weight and CG calculations, based on initial figures and the fuel burn.