 ZHUHAI, China--BUSINESS WIRE--Spirit AeroSystems, Inc. Spirit, a subsidiary of Spirit AeroSystems Holdings, Inc. NYSE: SPR Spirit AeroSystems, announced today it signed, through its Belfast, Northern Ireland operations known as Short Brothers, an agreement with SF Airlines SFA to modify inlet cowlings for its Boeing 757 cargo freighters. SF Airlines CEO Mr. Li Sheng attended the contract signing with Mr. Kailash Krishnaswamy, General Manager of Spirit AeroSystems Hangzhou Ente 