The aviation regulators of the U.S. (FAA) and China (CAAC) have agreed to recognize each others’ safety rules. That’s another step on the way to Chinese state-owned aerospace manufacturer COMAC to being able to export its C-919 jet. That represents a threat for Boeing in its Chinese sales, international sales outside China and even in the U.S. – it may need to resort to trade cases as it has done against Bombardier. Panjiva data shows U.S. exports accounted for 59% of China’s $23 billion of aircraft imports in the past 12 months, and had already fallen 6% on a year earlier. With China-bo...