Gustavsson’s first reaction was the sheer frustration of the fed-up office worker. “Oh great,” he replied—now they had to update the description in the manual. But Forkner appeared to have deeper concerns. He wrote that it meant he had “lied (unknowingly) to the regulator” about the system’s authority over the stabilizer, its ability to flummox a pilot. “Why are we just now hearing about this?” Forkner asked.

