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FMS
Flight management system
FMS 1 is located in MAU 2 and is powered by DC Bus 2, and FMS 2 is located in MAU 3 and is powered from DC ESS Bus. The MCDUs are the interface between the flight crew and the FMS. In an electrical emergency the FMS 2 is powered with MCDU 2. In normal operation, MCDU 1 interfaces directly with FMS 1, MCDU 2 interfaces with FMS 2, and the 2 FMSs talk together (dual mode)
Composed of:
Interfaces with:
Modes
| Dual | each unit provides data to the other unit (MCDU) |
| Independent | each MCDU controls the on-side FMS |
| Single | both MCDUs are connected to one FMS, one at a time |
Databases
| Navigation | updated every 28 days |
| Custom | contains pilot entered information such as flight plans and waypoints |
| Aircraft | all aircraft specific performance parameters (includes learned data) |
| Company route | company flight plans |
Functions
| PERF* | performance pages, takeoff and landing data, initialisation of stored flight plans |
| NAV* | navigation pages, fix info, sensor data, stored flight plans, maintenance pages |
| FPL* | flight plan pages |
| PROG* | progress information |
| VNAV | vertical navigation, accessed through PROGRESS and VNAV DATA MCDU pages |
*MCDU buttons
EICAS messages
FMS POS DISAG
FMS 1/2 - GPS POS DISAG
FMS 1/2 FAIL
See also
Categories: Embraer 170/190 | Flight Instruments/Comm/Nav/FMS