Boeing has slowed production to focus on safety following January's Alaska Airlines blowout, but customers are growing impatient.

It’s been one problem after another for Boeing since the start of the year. It all began when a panel fell off mid-flight from one of its aircraft flown by Alaska Airlines. That set off a cascade of unfortunate events,

As the aircraft maker struggles to get back on course, one of its biggest customers finds the delivery delays "extremely annoying" and costly, but has faith Boeing's turbulent days will pass.

Lufthansa CEO Carsten Spohr has described problems at Boeing this year as “extremely annoying” but remains positive about the planemaker’s future.

Another day, another airline CEO publicly grumbling about how long they’re having to wait on unfulfilled orders from Boeing. This time, it’s Carsten Spohr of Lufthansa. In an interview with the Swiss newspaper Neue Zuercher Zeitung,