SEATTLE -- Could more delays be looming for Boeing's 787 Dreamliner?

Aviation Week, the "bible" of the industry, is reporting that the suppliers of two key systems are behind schedule, threatening to push back next month's electrical "power-on," in one case, and the plane's first flight, in the other.

Aviation Week identifies the systems as a brake control monitor supplied by GE and Crane, and a Hamilton Sundstrand electric power system.