Spirit AeroSystems Holdings Inc. 1Q2 2008 profit rose 21%, helped by increased revenue and operating efficiencies. Net income rose to $85 million, or 61 cents per share, compared with $70 million, or 50 cents per share, in the prior year. Its quarterly sales grew to $1.04 billion from $954 million. Backlog increased 4 percent to $27.5 billion.