Boeing has moved its No. 4 test 787 Dreamliner to Colorado Springs, Colo., for high-altitude testing at 6,200 feet above sea level.
The plane had been operating from Mesa, Ariz., for high temperature tests.
The Colorado Springs airport’s longest runway is 13,500 feet because the thin air at higher altitudes require aircraft to accelerate to higher speeds before they can take off.
The four-plane Dream-liner test fleet has accumulated more than 850 hours of test flying. It’s expected to be approved by the FAA by the end of the year.