Abstract: A method for determining one or more faults of an aircraft rotating machine. The method comprising a step of measuring at least one acoustic signal and at least one vibratory signal during a same operating phase of the rotating machine, a step of transforming each signal into an acoustic frequency spectrum, a step of determining a set of frequencies of interest in the set of frequency spectra, a step of forming a base of fault spectra, each fault spectrum comprising at least one frequency line, each frequency line being obtained by linear combination of frequencies of interest with predetermined weighting coefficients, a comparison step in order to obtain a score, and a step of determining faults of the rotating machine by analyzing the scores obtained.