SEATTLE, March 06, 2008 -- Southwest Airlines contacted Boeing for verification of its technical opinion that the continued operation of SWA's Classic 737s, for up to 10 days until the airplanes could be reinspected, did not pose a safety of flight issue. Based on a thorough review of many factors, including fleet history and test data, as well as other inspections and maintenance previously incorporated, Boeing concluded the 10-day compliance plan was technically valid. In Boeing's opinion, the safety of the Southwest fleet was not compromised.