Method and device to assist in the piloting of an aircraft in a non-precision approach during a landing phase

1. A method to assist the piloting of an aircraft in a non-precision approach during a landing phase, wherein a series of successive steps is carried out automatically, the series of steps comprising:

a) verifying, according to respective standards of operation, conditions relating to the correct functioning of a plurality of equipment of the aircraft and to the integrity and precision of measurements of parameters used for implementing the non-precision approach, based on information coming from the plurality of equipment;

b) selecting, on the basis of the verified conditions, one of a plurality of different non-precision approach categories; and

c) presenting the selected approach category on a display screen, wherein:

each non-precision approach category defines the approach mode or modes that are possible from among a plurality of approach modes including a plurality of assisted approach modes and a selected approach mode,

in step b) a first approach category is selected when the following conditions are verified simultaneously in step a):

two flight management computers of the aircraft are functioning correctly;

satellite positioning functions of two multimode landing assistance receivers of the aircraft are functioning correctly;

at least two inertial reference systems of the aircraft, integrating aerodynamic data, are functioning correctly;

at least one assisted approach mode function of at least one of the multimode landing assistance receivers is functioning correctly;

an altitude value of the aircraft has a precision that is greater than a predetermined value;

the integrity and precision of a position value of the aircraft are achieved; and

a position of the aircraft, calculated by at least one of the flight management computers, and a position of the aircraft, received from a satellite positioning system, are consistent, and

if the selected approach category is the first approach category, a pilot may choose any one of the various possible assisted approach modes as the approach mode for landing the aircraft.

2. The method of claim 1 , wherein the conditions verified in step a) include:

verifying the correct functioning of an assisted approach mode function of each of the two multimode landing assistance receivers;

verifying the correct functioning of each of three inertial reference systems, which integrate aerodynamic data;

verifying the correct functioning of an attitude and direction indicator of the aircraft; or

verifying the uncertainty of the position value of the aircraft.

3. The method of claim 1 , wherein step a) further comprises verifying, according to a standard of operation, the correct functioning of an automatic pilot of the aircraft.

4. The method of claim 1 , wherein the method is performed by a device of the aircraft.