The head of Federal Aviation Administration says he's confident the Boeing 787 is safe, but he remains concerned about recent incidents, including a fire and a fuel leak earlier this week.

A Boeing 787 Dreamliner operated by United Airlines takes off at Los Angeles International Airport (David McNew/Getty Images)

Michael Huerta, the FAA administrator, said at a news conference Friday that there is nothing in the data the agency has seen to suggest the plane isn't safe.

FAA also announced it is undertaking a comprehensive review of the 787s critical systems, including design, manufacture and assembly.