Patent ID: 8447444

Claim:
A method for automatically detecting, on board an aircraft (A), during a flight, a lateral dissymmetry of said aircraft (A), comprising automatically: a) determining, by a processor, the current values (P, R) of a first couple of flight parameters of the aircraft, which represent the roll rate and the yaw rate of the aircraft (A) and the current values (DP, DR) of a second couple of auxiliary parameters illustrating the deflections of control surfaces ( 10 A, 10 B, 10 C) of the aircraft (A), which act on the lateral behaviour of the latter; b) carrying out, by a processor, a dynamic monitoring function comprising: on the one hand, checking whether said current values (P, R) of said first couple are in at least a first predetermined set (E 1 ) of couples of flight parameters; on the other hand, checking whether said current values (DP, DR) of said second couple are in at least a second predetermined set (E 2 ) of couples of auxiliary parameters; and generating a dissymmetry information indicating on which side of the aircraft (A) is the origin of a dissymmetry and transmitting an enabling signal, when, at least during a predetermined period, said first and second couples of current values are simultaneously in said first and second sets (E 1 , E 2 ) respectively, said successive steps a) and b) being implemented repeatedly; c) when an enabling signal is transmitted, at the end of a predetermined auxiliary period after such transmission, carrying out a static confirmation function for checking whether the equilibrium current values (DP, DR) of said second couple are in at least a predetermined auxiliary set (E 3 ) of auxiliary parameters and transmitting a detection signal which indicates the detection of a lateral dissymmetry and the side of lateral dissymmetry, if said current values (DP, DR) are in said auxiliary set (E 3 ); and d) when a detection signal is transmitted, using said dissymmetry information on board the aircraft (A).