Boeing and the Federal Aviation Administration have deemed the 787 aircraft safe, after performing a review of the Dreamliner.
"We do conclude that the aircraft is safe and that it meets its intended level of design and safety," FAA Administrator Michael Huerta told USA Today.
Initial issues with the plane's lithium-ion battery led officials to open the investigation. FAA representatives looked closely at the plane's design, production and assembly of the 787 beginning Jan. 11, 2013.
USA Today reported the probe began just four days after a lithium battery on a parked Japan Airlines jet in Boston caught fire. No one was on the plane at the time.
An All Nippon Airways flight was forced to make an emergency landing five days after the investigation was opened, due to another burning battery.
But the review didn't just consider the battery or electrical system - officials looked at the entire construction of the plane itself.
In the 71-page report, FAA and Boeing were given seven suggestions to make the aircraft safer for travelers.
"We concluded that the aircraft was soundly designed, and that Boeing and the FAA had processes in place that were designed to identify and correct any issue that might arise during the manufacturing process," Huerta told USA Today. "It's many layered. You don't have single points of failure."
According to CEO of Boeing Commercial Airlines Ray Conner, the company has begun making changes in line with the recommendations, which included increased communication and expectations with manufacturers.
"The findings validate our confidence in both the design of the airplane and the disciplined process used to identify and correct in-service issues as they arise," he stated.
Although Boeing has not pinpointed exactly what caused the problems, the aircraft company has shifted its insulation practices to separate each battery's cells. Boeing also created a fireproof shell for the battery that cuts off all oxygen if a fire sparks.
"It is truly an aircraft that is going to change how all kinds of commercial aircraft are designed and built," industry analyst with Hudson Crossing Henry Harteveldt told USA Today. "It's understandable that some glitches occur. It's disconcerting that some of these problems are basic."
