Aircraft regulators within the Usa have approved a revamped battery design for the Boeing 787 Dreamliner.
The decision paves the style for the fleet to go back to the skies, after problems grounded it for months.
The Federal Aviation Administration said airlines had to replace the batteries to go back to service.
Boeing chairman Jim McNerney said: “FAA approval clears the style for us and the airlines to start the method of returning the 787 to flight with continued confidence within the safety and reliability of this game-changing new airplane.”
Planes will now must be fitted with a “containment and venting” system for both the lithium-ion batteries.
That encompasses a stainless-steel enclosure to avoid heat, fumes or fire from spreading if a battery overheats in flight, said the FAA.
There are presently 50 Boeing Dreamliners in service all over the world.