Always thought the FE -1 preflt was to ensure the acft was capable & configged to do the mission - after the mx guys made sure the acft was safe to fly, had it prepped & all was in order. Sometimes we had (found) issues, but by & large, we got a very good product from mx. In 20 years on the acft, can only recall just a very few instances when mx gave us a plane they knew shouldn\'t fly - & then only under lots of pressure by higher-ups to make release time.