The training initiative is still being developed and will be rolled out over years, one of the people said. While costs are expected to rise over time, the effort may overlap with future aircraft programs. "It will involve significant funds to raise standards around the world and requires Boeing putting its own money in," said another person familiar with the project. Boeing Chief Executive Dennis Muilenburg was accused by U.S. lawmakers in back-to-back hearings last week of placing profits over those safety standards, a charge Boeing denies. Muilenburg said Boeing would help "build a talent pipeline" of pilots and invest heavily in the pilot-machine interface or fight deck for the next generation, but gave few details. A Boeing spokesman declined additional comment. Part of Boeing's investments will include improving aviation infrastructure, such as air traffic and flight simulation systems, a third person with knowledge of the plans said.