Complex sentence: Although the aircraft suffered only minor damage, LeVier again found landing the U- 2 difficult during the actual first test flight three days later; on his sixth try, he found that landing the aircraft touch down on the rear wheel first was superior to the front.
Split into simpler sentences: Although the aircraft suffered only minor damage, LeVier again found landing the U- 2 difficult during the actual first test flight three days later. On his sixth try, he found that landing the aircraft touch down on the rear wheel first was superior to the front.