METHOD AND DEVICE FOR FLIGHT MANAGEMENT IN CASE OF A DIFFICULT CONTEXT IN THE EVENT OF THE INCAPACITATION OF AT LEAST ONE PILOT IN COMMAND

The device (1) is configured to warn the pilot in command that erroneous data has been entered in a secondary flight plan, monitor a pressure in a cabin of the aircraft (AC), monitor an operation of at least one engine (M) of the aircraft (AC), determine a capacity of the pilot in command and automatically activate an emergency trajectory if a cabin depressurization is detected or if a failure of at least one engine (M) is detected and if an incapacity of the pilot in command is detected. The device (1) makes it possible to ensure that the pilot in command has not entered erroneous data for the secondary flight plan.