Boeing mulls which tanker to offer U.S. Air Force

WASHINGTON, Sept 25 (Reuters) - Boeing Co (BA.N) said it is studying new draft bidding rules to decide which of its planes to pit against a rival Northrop Grumman Corp (NOC.N)-EADS EADS.PA aircraft in a U.S. Air Force $35 billion tanker competition.

Boeing said it has not yet decided whether to stick with its modified 767 tanker, which lost a previous canceled competition, or a larger 777-based tanker.

(Reporting by Jim Wolf, editing by Gerald E. McCormick)

(jim.wolf@thomsonreuters.com

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Reuters Messaging: jim.wolf.reuters.com@reuters.net)