A service member walks under the Osprey nacelle, which houses both the Osprey's engine and transmission system and bends upward like an elbow during vertical flight at Cannon Air Force Base, N.M., Oct. 8, 2024. The open panel shows the proprotor gearbox, which serves as the transmission and has been a factor in multiple crashes after parts wore down and broke apart in flight. (AP Photo/Tara Copp)