Seattle - Last week Boeing said that it foresees more delivery setbacks of its best-selling single-aisle due to the delays of fuselages and engines from suppliers.

CFM International, a joint venture between General Electric and French Safran, has had some difficulties in producing its new LEAP engine for the Boeing's 737 MAX series aircraft.

Boeing is also suffering from the delays of fuselages supplied by Kansas-based Spirit AeroSystems, the world's largest first-tier aerostructures manufacturer, which makes some 70 percent of the structure of the 737 series.

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You saw some of that making its way into 2Q deliveries a little bit, and you’ll see more of that in Q3 where we’ll expect to have deliveries lower than our production rate,
said Greg Smith, Boeing Chief Financial Officer.

And so, therefore, you’ll see a much more heavily weighted Q4,” Smith added. “Those jobs are now in our factory, and each one of those suppliers is getting more on track,
he added.

The delays endanger Boeing's plans to reach a production rate of 57 narrow-body jets per month in 2019.