Method and computer program for the maintenance aid of aircraft equipment
According to a first aspect, the subject matter disclosed herein relates to a decision aid method for maintenance operations of aircraft equipment, the aircraft including a maintenance system arranged to make a record of equipment failure messages and of equipment failure warning messages emitted during a flight, the method comprising extracting at least one combination of failure messages corresponding to failure messages recorded by the maintenance system during a flight and a set of previous flights; determining, as a function of the at least one extracted combination, a probability of occurrence of at least one warning message possibly accompanied by one or more failure messages.
1. A decision aid method for maintenance operation of aircraft equipment, the aircraft comprising a maintenance system arranged to make a record of one or more equipment failure messages and equipment failure warning messages emitted during a flight, the method comprising:
extracting, by at least one processor, at least one combination of failure messages corresponding to failure messages recorded by the maintenance system during a flight and a set of previous flights; and
determining, by the at least one processor, as a function of the at least one extracted combination, a probability of occurrence of at least one warning message, wherein:
warning messages are represented as nodes of a directed graph stored in computer memory comprising a set of arcs each provided with a transition probability from one warning message to another, each warning message of the directed graph corresponding to a given sequence of failure messages;
the at least one extracted combination corresponds to the sequence formed by the failure messages recorded during the flight and the set of previous flights;
the extracted sequence is represented as a mix of warning messages; and
the determining a probability of occurrence comprises calculating, by the at least one processor, a probability of occurrence of each of the warning messages of the graph made by a random walk on the graph initialized by the representation of the extracted sequence.
2. The method according to claim 1 , wherein the random walk on the graph is a teleportation walk characterised by a probability a of following the probabilistic transition arcs of the graph and a probability (1−α) of skipping evenly randomly to a node of the graph.
3. The method according to claim 1 , wherein a warning message of the graph corresponds to a given sequence of failure messages recorded before the occurrence of the warning message since the occurrence of a previous warning message.
4. The method according to claim 1 , comprising classifying warning messages of the graph taking into consideration an aircraft operating profile related to the warning messages.
5. A computer program product comprising code instructions for running steps of the method according to claim 1 , when the program is run on a computer.