All Nippon Airways said on Friday it was not considering any change to its orders of 787 Dreamliners and that it believed Boeing was making significant progress in resolving problems.
The planes have been grounded worldwide due to an undiagnosed battery problem and the impact has been felt most by ANA and Japan Airlines, which fly nearly half of the 50 787s delivered to date.
ANA chief executive Shinichiro Ito said he met Boeing commercial planes CEO Ray Conner on Wednesday.
"I was left with the impression that progress was being made," Ito said, adding that ANA will conduct its own test flights after authorities give the green light to resume flying.
Conner told reporters on Thursday the company discussed a permanent fix for its lithium-ion battery with Japanese authorities.
One battery, made by Kyoto-based GS Yuasa, caught fire onboard a JAL plane in the US while another forced an ANA plane to make an emergency landing in western Japan in January.
ANA has cancelled 3,601 domestic and international flights between January, when the plane was grounded, and the end of May.
ANA on Thursday said it was appointing Osamu Shinobe, the main architect of the strategy to put the 787 at the heart of its fleet planning, in charge of the airline business from April.
Shinobe, responding to a reporter's question on whether 787 will be allowed to fly again in April, said: "The ball is with Boeing and the FAA".