Method for determining at least one faulty piece of equipment of an aircraft, and corresponding system

A system for determining at least one faulty piece of equipment from amongst a plurality of pieces of equipment of an aircraft, comprising:

• means for reading a plurality of predetermined parameters for monitoring said equipment;
• means for defining a list of symptoms associated with said parameters read, using a predetermined correspondence table;
• means for attributing a value associated with each symptom according to the parameters read, which value is selected from amongst a predetermined list of values;
• means for evaluating for each piece of equipment an occurrence of one or more fault modes for said piece of equipment on the basis of at least one predetermined truth table which associates a fault mode with each combination of symptom values;
• and
• means for determining at least one faulty piece of equipment from amongst one or more pieces of equipment, of which at least one fault mode is currently occurring, referred to as potentially faulty equipment,
• wherein the evaluation means being designed to create, from the truth table, a decision tree comprising nodes, branches and leaves, said nodes defining tests relating to the values of the symptoms, said branches defining possible paths to complementary tests or to leaves, and said leaves defining the occurrence of the fault mode and being designed to evaluate the occurrence of a fault mode from said decision tree.