Complex sentence: Credible Sport was tasked to create a large "Super STOL" fixed-wing aircraft to extract the rescue team and hostages and overcome the "weak link" in the previous plan, the heavy lift helicopter.
Split into simpler sentences: Credible Sport was tasked to create a "Super STOL" aircraft. The use of a large fixed-wing aircraft to extract the rescue team and hostages was to overcome the "weak link" in the previous plan, the heavy lift helicopter.