The unfolding saga of Boeing’s highest-profile plane has raised new questions about federal oversight of aircraft makers and airlines. After two separate and serious battery problems, it wasn’t U.S. authorities who acted first to ground the plane. It was Japanese airlines. Some aviation experts question the ability of the Federal Aviation Administration to keep up with changes in the way planes are being made today—both the technological advances and the use of multiple suppliers from around the globe. Others question whether regulators are too cozy with aircraft manufacturers.

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