[SkyDancer]

Boeing used to advertise “a plane in a box? and had a computer terminal sitting in front of the plane ... most AC up until then went through hours of ground testing before it’s first flight. The 777 flew “the first time” right out of the box ...

[avg_freeper]

The 777 went through thousands of hours of avionic, GVT, FS static test, etc, etc.. before first flight.

It wouldn't even of been certified for first flight if not.