Abstract: A system for assisting aircraft fault resolution by statistical inference of big data includes secure equipment including a plurality of databases storing big data concerning variables monitored during aircraft monitoring as well as an aggregator module. The system also includes an analyst module, outside the secure equipment, in communication with the aggregator module. The analyst module is used to define a statistical query to be processed by the aggregator module, which performs a statistical inference on the big data stored in the plurality of databases in order to respond to the statistical query. The aggregator module checks that the result of the statistical inference anonymizes the big data in question, and transmits the result of the statistical inference to the analyst module. Thus, the confidentiality of the big data is respected.