The American aircraft manufacturer Boeing was forced to stop testing the new 777X aircraft after a cargo door opened during a test flight. A spokesperson for the company announced this on Sunday.
The problem revealed itself during a severe test in which the device had to make unusual maneuvers under extreme conditions. Aircraft must pass this test well to get an airworthiness certificate from the American aviation authority FAA.
The 777X is scheduled to hit the market in 2020. It counts as a modernized and much more economical version of the 777 that has been made since 1995. Several airlines have placed options on the new device for tens of billions of euros.
When developing the device, Boeing uses light composite materials, which are also used in the 787 Dreamliner. The launch date of the 777x had already been delayed due to problems with the engines. Originally the device would be put into use this summer.
Boeing is already struggling with major problems with the 737 MAX. That aircraft is not allowed to fly worldwide for months. That happened after a crash of an aircraft from Ethiopian Airlines as a result of an over-safety system.
A few months earlier, a 737 MAX from the Indonesian airline Lion Air had also crashed due to that system. A total of 346 people were killed in these two crashes.