Why NASA’s X-59 Performs a ‘Duct Dive’ After Every Flight

The Purpose of the Duct Dive Procedure

On April 30, 2026, general flight mechanic Johnathan Reynaga performed a 'duct dive' on the X-59 between its 11th and 12th flights at NASA's Armstrong Flight Research Center in Edwards, California. This procedure involves the mechanic climbing a ladder to the aircraft's top-mounted engine inlet and diving headfirst into the space to conduct a visual inspection. (Primary source)

During the dive, Reynaga used a flashlight to examine the engine's fan blades and other components within the inlet. He had to move carefully around special sensors used by the research team to gather data on engine performance while ensuring his own safety from overheating in the desert heat. (Primary source)

The X-59's top-mounted engine design offers specific advantages for this inspection. Juan Salazar, crew chief for the Low Boom Flight Demonstrator project, noted that while the inlet is similar in diameter to an F/A-18, it is shallower, making the dive easier compared to other aircraft with round, tight, curving inlet spaces. (Primary source)