中龄飞机和发动机仍然需求火热，但这能持续多久？ （Middle Aged Aircraft, Engines Still Hot. But For How Long?）

喷气飞机的燃油价格从2016年初开始上涨，尽管仍比2000年代初低了40%以上。但是，航空工业内部很少有人对油价进一步上涨感到惊讶，反而会对中龄飞机和发动机市场能否持久增长产生疑问。

Jet fuel prices have trended upward since early 2016, although they are still about 40% lower than during the early part of this decade. However, few within the industry would be surprised by further increases, which raises questions about whether growth in the midlife aircraft and engine market can be sustained.