President Obama tours the Rolls-Royce Crosspointe jet engine disc manufacturing facility in Prince George, Va., on Friday, March 9, 2012, with employees Robert Abernathy (left) and Steven C. Morris. The facility makes precision-engineered engine discs and other components for aircraft. (Associated Press)
Parts of a Rolls-Royce engine are displayed at the 8th China International Aviation and Aerospace Exhibition (Zhuhai Airshow) in Zhuhai, southern coast of Guangdong province, China, Tuesday, Nov. 16, 2010. Rolls-Royce will temporarily replace any oil-leaking engines like the one that caught fire and blew apart on a Qantas superjumbo jet earlier this month, and aviation official said Monday. Qantas said it found oil leaks in three of its Airbus A380s powered by the Rolls-Royce engines. Its entire fleet of six remains grounded since the blowout on the flight to Sydney, which forced the safe return of the jet to Singapore. The airshow will run from Nov. 16 to 21. (AP Photo/Kin Cheung)
** FILE ** Jean Lyndon-Rodgers (left), president of GE Aviation, and Mark Rhodes, senior vice president of Rolls- Royce, stand near the F-136 jet engine in Evendale, Ohio, in October 2009. The alternative engine is "unnecessary" and may harm the Joint Strike Fighter program, Defense Secretary Robert M. Gates said then.