NEW YORK (Standard&Poor's) Nov. 17, 2009--Standard&Poor's Ratings Services today assigned its 'A' rating to Boeing Co.'s proposed offering of $1.2 billion senior notes that it will issue in two tranches, due 2012 and 2016. Boeing will issue the notes as a drawdown on the company's existing rule 415 unlimited shelf registration and will use the proceeds for general corporate purposes. "Our ratings on Boeing reflect its position as one of two global producers of large commercial aircraft and one of the largest U.S. defense contractors, as well as significant liquidity," said Standard&Poor's credit analyst Philip Baggaley. Our concerns include the possibility of further production cuts due to airline order deferrals and cancellations and risks