787 achieves first hydraulic power-on

Boeing today announced achieving power-on of the hydraulic systems for the first 787, taking one step closer to the scheduled first flight event in the fourth quarter.

Boeing CEO Jim McNerney disclosed the hydraulic systems milestone, which arrives nearly a month after electrical systems power-on, during a conference call with analysts.

The activation event last week enabled the first movement of the aircraft’s hydraulically-powered control surfaces.

These include the ailerons, rudder, flaperons and some spoilers. The aircraft’s elevators are not yet installed and some spoilers run on electric rather than hydraulic power.The flaps and slats are controlled through a mechanical drive system.

Following the successful hydraulic power-on, the aircraft will continue to undergo functional systems testing. The aircraft will be raised up off its landing gear to test the retraction and stowage of the landing gear.

Suppliers Parker Hannifin and Hamilton Sundstrand are responsible for the 787′s hydraulic subsystems.

2 Responses to 787 achieves first hydraulic power-on

  1. RW - San Clemente July 24, 2008 at 10:00 am #

    A massive redesign of what??? I’d stop huffing Jet A, it may lead to brain damage…if it hasn’t already. Spirit, Mitsubishi, Kawasaki, Fuji etc are hardly amateurs. I love all the armchair quarterbacks who think this stuff is simple. There are going to be kinks in any complex, much less, global supply chain. Boeing is not immune to it. The question is…do they find the problem, learn from their mistakes, and fix it? It seems that they have made a huge investment to do so. My prediction, in a couple of years, people like Techman will be singing the praises of Boeings manufacturing process and how they knew it would work all along!

  2. Mike McInerney July 25, 2008 at 7:07 am #

    Grand achievement to get a system up and running. It would intriguing to see how many joints may weep in general use with the very high hydraulic prssure this aircraft is to operate at compared to earlier aircraft with lower pressures..