May Never Know What 787 Batteries Failed

NAIROBI, Kenya (AP) — A senior engineer with Boeing says the company may never know what caused battery problems that have grounded the company's 787 Dreamliners. Richard J. Horigan, the engineering leader of the 787, said today the root cause of smoldering batteries experienced by the two different 787s may never be known because the evidence was destroyed by heat. The FAA has approved Boeing's redesigned battery system.