MSGID: 2:292/854 04114211
Boeing is experiencing problems testing the new 777X. According to sources, a
so-called cargo door was blown out of the hull of a static test aircraft
during so-called "final load tests". The test was then interrupted. It may
mean a new setback for Boeing.
 
The final load tests are standard part of the certification program of a new
aircraft type. A static test aircraft is thereby exposed in an experimental
set-up to extreme forces on the wings and fuselage. The test took place under
the supervision of the aviation authority FAA.
 
According to the Seattle Times, the cargo door failed on Thursday during the
pressure tests at the Boeing facilities in Everett, where it was blown out. A
777X employee who was nearby said that he heard a "loud bang" and that the
ground was shaking.
 
Boeing admitted in a statement that a problem occurred during the final load
test of the 777X, which meant that it had to be discontinued. Boeing
emphasizes that the conditions being simulated are much harsher (around 150
percent) than a commercial aircraft will ever experience.
 
Further investigation must show how the incident could have taken place. It is
therefore still unknown whether it will affect the certification program of
the 777X. That aircraft is a modernized version of the 777 with new, lighter
wings and efficient engines.
 
The 777X program is not running according to schedule. Boeing actually wanted
to perform the first test flight this summer, but due to problems with the
General Electric GE9X engines of the plane, that date has been postponed to
early 2020.

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