Aircraft system

An aircraft system for an aircraft, the aircraft system comprising a controller that is configured, during a take-off procedure, to:

• determine whether the aircraft is operating within a certified operational domain of the aircraft;
• determine whether a door-opening criterion is met;
• and
• prior to receiving a command to retract a landing gear of the aircraft:
• initiate automatic opening of a landing gear bay door associated with the landing gear from a closed position towards an open position, based on the determinations by the controller that the aircraft is operating within the certified operational domain and the door-opening criterion is met;
• and
• inhibit the automatic opening based on the determination by the controller that the aircraft is not operating within the certified operational domain.

A method of operating a controller of an aircraft system of an aircraft during a take-off procedure, the method comprising:

• the controller determining that a predetermined take-off criterion is met;
• the controller determining that a one engine inoperative condition is met;
• and
• on the basis of the determination that the one engine inoperative criterion is met, and prior to receiving a command to retract a landing gear of the aircraft:
• the controller initiating automatic opening of a landing gear bay door associated with the landing gear from a closed position towards an open position when the determination is made by the controller that the predetermined take-off criterion is met, and
• the controller inhibiting the automatic opening when the determination is made by the controller that the predetermined take-off criterion is not met.