Method and device for diagnosis of a loss of control of an aircraft

A method for diagnosis of a loss of control of an aircraft comprising the steps:

• loading raw data originating from onboard sensors,
• loading parameters of the aircraft,
• computing a plurality of reference data relating to the aerodynamic behaviour of the aircraft, each reference datum being obtained on the basis of at least one value of a loaded raw datum, the computation step comprising a preprocessing, the said preprocessing comprising for at least one reference datum a sub-step of computing a phase advance term determined on the basis of the temporal evolution of the said reference datum,
• determining characteristic thresholds indicative of loss of control respectively associated with a set of parameters comprising at least one reference datum and one type of loss of control,
• detecting at least one type of loss of control by comparing the reference data with characteristic thresholds, each type of loss of control having an associated priority level, and
• when at least one type of loss of control is detected:
• identifying the type of priority loss of control corresponding to the type of loss of control exhibiting the highest priority level,
• communicating the type of priority loss of control to a crew.