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US Patent 7621117 Apparatus and method for controlling engine windmilling

Patent 7621117 was granted and assigned to Pratt & Whitney Canada on November, 2009 by the United States Patent and Trademark Office.

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Patent abstract

An apparatus and method are provided for controlling the ground windmilling of at least one of the spools in a gas turbine engine. Electrical power is supplied to a braking apparatus in one aspect. In another aspect, an oil system is powered during ground windmilling.

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