Aircraft system

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

• initiate, prior to receiving a command to retract a landing gear, automatic opening of a landing gear bay door associated with the landing gear from a closed position towards an open position, on the basis of a determination, made within a predetermined period, that a one engine inoperative condition is met, the predetermined period being during the take-off procedure.

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 one engine inoperative condition is met;
• and
• the controller initiating, prior to receiving a command to retract a landing gear, automatic opening of a landing gear bay door associated with the landing gear from a closed position towards an open position, on the basis of a determination, made when a speed of the aircraft is determined by the controller to be equal to or greater than a first threshold speed, that the one engine inoperative condition is met.