More carriers are flying with the latest-generation turbines that — while as much as 20% more fuel efficient — also have been prone to far more frequent maintenance cycles than their more robust predecessors.

Unloved during the pandemic with their business paralyzed almost overnight, airlines that cut back to survive the crisis are now blowing through profit forecasts and luring back investors.

Boeing plans to launch mainland Chinese flights to Beijing and Shanghai and to Osaka in central Japan, according to the company’s website.

One of the worst near-disasters in U.S. history, pilots of an Air Canada flight from Toronto to San Francisco missed a notice about a closed airport runway buried in 27 pages of Notams and other bulletins.

Boeing has faced a number of issues in recent years, including the grounding of its 737 Max after two fatal crashes.

Lawyers for the families argue that they were blindsided by the 2021 controversial deferred prosecution agreement with the government that granted the company legal immunity, and weren’t consulted on its terms.

The proceedings mean that, for the first time, the company will be formally charged in court in relation to the two crashes, and will have to plead guilty or not guilty.

One factor working in China’s favor is that unlike Western carriers, airlines in China have largely continued to operate their fleets domestically throughout.

China’s surprise decision to drop border curbs earlier in January has given the industry a boost following earlier projections for a reopening much later in 2023.