2008-06-22 - 787 power onBoeing achieves 787 Power On
Fortschritte für die 787<br /> Boeing has completed the Power On sequence for the first 787 Dreamliner, marking the completion of the next major milestone on the path to first flight later this year. Power On is a complex series of tasks and tests that bring electrical power onto the airplane and begin to exercise the use of the electrical systems.
The 787 is a moreelectric airplane with the pneumatic, or bleed air, system being totally replaced by electronics. The Power On sequence began in early June with a series of pretest continuity checks to verify that the wiring installed in the airplane had been connected properly. Upon completion of those checks, the Boeing team plugged in an external power cart and slowly began to bring full power into each segment of the system, beginning with the flight deck displays. From that point forward, the pilot's controls were used to direct the addition of new systems to the power grid. At each step of the testing, power is allowed to flow into one additional area and gauges are used to verify that the right level of electrical power reached the intended area.