The U.S. Federal Aviation Administration is conducting a comprehensive review of the design, manufacture and assembly of the Boeing 787, but government officials declared the plane safe despite recent incidents including a fire and a fuel leak earlier this week, AP reported. Michael Huerta, the FAA administrator, said at a news conference Friday there is nothing in the data the agency has seen to suggest the plane isn't safe, but the agency wants to figure out why the safety-related incidents are occurring. Transportation Secretary Ray LaHood went a step further: "I believe this plane is safe, and I would have absolutely no reservations about boarding one of these planes and taking a flight," he said. The 787, which Boeing calls the "Dreamliner," is the aircraft maker's newest and most technologically advanced airliner. It relies more than any other modern airliner on electrical signals to help power nearly everything the plane does. It's also the first Boeing plane to use rechargeable lithium ion batteries, which charge faster and can be molded to space-saving shapes compared to other airplane batteries. The plane is made with lightweight composite materials instead of aluminum. A fire ignited Monday in the battery pack of an auxiliary power unit of a Japan Airlines 787 empty of passengers as the plane sat on the tarmac at Boston's Logan International Airport. It took firefighters 40 minutes to put out the blaze. Also this week, a fuel leak delayed a flight from Boston to Tokyo of another Japan Airlines 787. On Friday, Japan's All Nippon Airways reported two new cases of problems with the aircraft. ANA spokeswoman Ayumi Kunimatsu said a very small amount of oil was discovered leaking from the left engine of a 787 flight from southern Japan's Miyazaki airport to Tokyo. The jet returned to Miyazaki, but after checks found no safety risk, it flew to Tokyo. ANA said on another flight, to Matsuyama on the island of Shikoku, glass in a cockpit window cracked, and the aircraft was grounded for repairs. ANA said it has no specific plan for inspections and will continue regular operations, though it said it would comply with instructions from the FAA and other authorities. Boeing has insisted that the 787's problems are no worse than what it experienced when its 777 was new in the mid-1990s. That plane is now one of its top-sellers and is well-liked by airlines. -- SPA