All Nippon Airways Co. plans to start using Boeing 787s again for domestic routes from June 1 and will begin accepting reservations from Monday, after having to ground its entire Dreamliner fleet due to battery troubles.

Friday's announcement came as the U.S. Federal Aviation Administration continues to examine the steps proposed by Boeing to improve the 787's battery system.

If FAA approval is delayed, ANA may be forced to keep its 17 Dreamliners grounded and scrap the planned flights. In such an event, the airline said it would allow passengers to cancel their reservation and get a refund or switch to other flights.

ANA had to cancel 1,714 domestic and international Dreamliner flights from March 31 to May 31 due to the global grounding of Boeing's troubled new jet. The 787 has suffered a spate of incidents linked to its battery system, including an emergency landing by an ANA-operated Dreamliner at Takamatsu Airport in Kagawa Prefecture in mid-January.