34-59-00  MULTI MISSION MANAGEMENT SYSTEM Back

A. System Functions

The Multi Mission Management system (MMMS) gives centralized control of the aircraft navigation sensors, computer-based flight planning and fuel management and provides an interface for ACARS communications systems.

B. System Components (Ref. Fig. 1)

The primary components of the system are the:
  • Navigation Control Display Unit (NCDU)
  • Configuration module
  • Data Transfer Unit (DTU)
  • Global Positioning System (GPS) antenna.

C. System Operation

The MMMS uses a GPS receiver which is installed in the NCDU and an antenna to receive data from GPS satellites. This data used with other sensor inputs to calculate a composite aircraft position.

The MMMS provides navigation data which can be displayed on the Electronic Flight Instrument System (EFIS).

Steering commands from the MMMS can be input to the flight director. The steering commands can be coupled to the autopilot to give automatic course steering.

Inputs from the pilot and the engine fuel flow system are used to calculate fuel management data. This data is displayed on the NCDU.

The NCDU is used as the pilot interface for the ACARS communication system. ACARD data is displayed on the NCDU and the NCDU keys are used to input data manually to the ACARS system.

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