United launches three-year, $133 million PW4000 engine upgrade program with P&W
United Airlines launched a three-year, $133 million PW4000 engine upgrade program with Pratt&Whitney to improve fuel burn and extend the range of its 747-400 and 767-300 jetliners - 47 aircraft in all. The Phase III upgrade option was available as early as 1994, but cost too much, says Andy Studdert...
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