Windmilling locking systems for gas turbine engines

Abstract

An anti-windmilling control method for a gas turbine engine, the gas turbine engine including an engine shaft with a rotating component and an accessory gearbox each operably coupled to the engine shaft, an accessory locking brake operably connected to the accessory gearbox and configured to selectively control operation of at least one gear of the accessory gearbox, and a controller arranged in communication with the accessory locking brake, the method including: determining, with the controller, that the gas turbine engine is at altitude; determining, with the controller, that the gas turbine engine is in a state of windmilling; and in response to determining that the gas turbine engine is in the state of windmilling, activating the accessory locking brake to engage with the at least one gear to prevent rotation of the at least one gear, thereby halting rotation of the engine shaft and the rotating component.

Dependencies are inferred from the claim text.