Standard procedures of the Flight 4 of Falcon 1 include rigorous testing. On Saturday we reported that the testing took place and reports were to be available soon. The results are in and, as expected, no major issues came up.

However, after a detailed analysis of data, the SpaceX team decided to replace a component in the 2nd stage engine LOX supply line. There is a good chance it would be good to go as is, but they are being extremely cautious. As a result it adds a few extra days to the schedule, thereby reworking the launch to the updated launch window estimate to be September 28th through October 1[CA time].