Method of automatically regulating an aircraft power plant, a device, and an aircraft

A regulation device for regulating a power plant of an aircraft, said power plant comprising at least one turbine engine, said aircraft having at least one rotary wing provided with a plurality of blades having variable pitch and driven in rotation by said power plant, and it being possible for each engine to operate in an idling mode of operation and in a flight mode of operation, wherein said regulation device comprises:

• a determination system for determining a collective pitch of said blades;
• a determination device for determining a state in which the aircraft is standing on the ground;
• a selector having two positions (POS1, POS2), said selector having a first position (POS1) requesting each engine to stop and a second position (POS2) requesting each engine to operate;
• and
• a computation system connected to the determination system for determining the collective pitch and to the determination device for determining an aircraft standing state and to the selector for controlling each engine, said computation system executing stored instructions for automatically implementing the idling mode of operation in each engine if a collective pitch (CLP) of said blades is less than a threshold and if the aircraft is standing on the ground.