Method and system for controlling an aircraft propulsion system in an aircraft susceptible to ground resonance

An aircraft propulsion system for an aircraft, the system comprising:

• an aircraft propulsion engine and a rotary blade propulsion unit, the aircraft propulsion engine having an electric motor and a gearbox, wherein the electric motor is in drive communication with the gearbox and the gearbox is in drive communication with the rotary blade propulsion unit;
• and
• a system controller in communication with the electric motor and a memory storing instructions, which instructions when executed cause the system controller to:
• determine the presence or absence of a parameter indicative of a ground resonance condition;
• and
• control the electric motor to deliver an amount of torque to the gearbox to drive the rotary blade propulsion unit to produce enough lift to make the aircraft airborne when the presence of the parameter indicative of the ground resonance condition is determined.