...- The outlook for the recovery in global air travel and therefore aircraft demand, continues to weaken, which will likely result in lower Boeing earnings and cash flow than we previously expected the next few years, delaying an improvement in credit ratios. - However, the company should have sufficient liquidity to cover large cash outflows over the next 6-12 months and free cash flow is likely to turn positive in 2021. - Therefore we are affirming our ratings, including the '###-' long-term and 'A-3' short-term issuer credit ratings, on the aerospace and defense company, but revising the outlook to negative from stable. - The negative outlook reflects that the impact of the coronavirus pandemic on aircraft demand could be materially worse or take longer to recover than we expect, delaying an improvement in earnings and cash flow....