UPDATED 6:54 AM EST, January 31, 2013
A fire and emergency landing earlier this month, both involving the batteries, prompted regulators to ground Boeing's newest and highest-profile plane.
All Nippon Airways said Wednesday that it replaced batteries 10 times before the overheating problems surfaced earlier this month. McNerney said airlines have been replacing 787 batteries at a rate that's "slightly higher" than Boeing had expected. They've all been replaced for maintenance reasons, not for safety concerns, he said on a conference call.
