SAN FRANCISCO (Standard&Poor's CreditWire) June 15, 2001--Standard&Poor's has assigned its single-'A'-plus rating to the San Francisco Airport Commission, Calif.'s $490.3 million second series revenue refunding bonds series 27 A and B. The bonds are scheduled to sell on June 19, 2001. In addition, Standard&Poor's has affirmed its single-'A'-plus long-term and underlying ratings (SPURs) on the commission's outstanding bonds. The outlook is negative. The rating reflects the airport's importance in the aviation system, a solid air trade area, and a strong management team anticipating current and very sizable future airport capital needs. Specific credit positives include: - - Fundamental service area strengths associated with the diversified Bay Area economy, employment, and population base with well-above-average