Boeing also reported that all four of its Rolls Royce Trent powered aircraft were in the air at the same time last Saturday (May 8th).
This is a first for their program and yesterday, the test flight fleet exceeded 20% of the required (3,100 hours) test flight hours. They are now over 620 flight test hours and the program is seemingly gaining more momentum and increasing the test flight tempo.
UPDATE: Boeing just put out a video of the first engine run on ZA005:
Starting up a new generation of engines
Boeing Completes First 787 GEnx Engine Runs
EVERETT, Wash., May 12 /PRNewswire-FirstCall/ -- The first General Electric GEnx engines on a Boeing (NYSE: BA) 787 Dreamliner came to life Monday with initial engine starts. Customers can choose between the GEnx engines and the Rolls-Royce Trent 1000 engines to power their 787s.
"This is another exciting step in our progress on the 787 test program," said Scott Fancher, vice president and general manager of the 787 Program, Boeing Commercial Airplanes.
"Our partners at GE have worked diligently to ensure their engines are ready for the testing that is going to occur both before first flight of ZA005 and throughout the flight test program."
Video of the engine run is available at http://www.boeing.com/.
Following engine testing, ZA005, the fifth 787 to be built, will undergo a series of ground tests similar to those conducted on the first 787s to ensure that it is ready for first flight later this quarter.