Monitoring of an aircraft propulsion system

6:

• A system for monitoring the propulsion system of an aircraft comprising:
• means for selecting elements representative of operation of the propulsion system,
• means for modelling the propulsion system by a model comprising the selected elements, a set of exogenic parameters of the propulsion system and interdependence relations between elements, operation of a given element being modelled by at least one endogenic parameter dependent on at least one of the exogenic parameters and/or at least one parameter of another element,
• means for analysing elements, the analysis of the given element including the expression of the at least one endogenic parameter of the given element as a function only of exogenic parameters of the propulsion system and being made by layers in different levels, a layer in a given level being able to take account of at least one parameter that is the result of a layer in another analysis level of another element.