Patent ID: 8255148

Claim:
Method for optimizing the flight of an aircraft comprising a flight management system, the said flight management system using a first cost index (CI 1 ) and calculating a first speed (V 1 ) on the basis of the first cost index (Cl 1 ), the said flight management system calculating, furthermore, a first prediction of remaining flight time (T 1 ) and a first prediction of fuel consumption (EFOB 1 ) on the basis of the first speed (V 1 ), the said method wherein it comprises, furthermore, the following steps: the selection of a second cost index (CI 2 ), the calculation by the flight management system of a second speed (V 2 ) on the basis of the second cost index (CI 2 ), and the calculation of a second prediction of remaining flight time (T 2 ) and of a second prediction of consumption (EFOB 2 ) on the basis of the second speed (V 2 ), the calculation of a discrepancy (ΔV) between the first and the second speed, of a discrepancy (ΔT) between the first prediction of remaining flight time and the second prediction of remaining flight time and of a discrepancy (ΔEFOB) between the first and the second prediction of consumption, the displaying of the discrepancies (ΔV,ΔT,ΔEFOB) calculated in the previous step.