All Nippon Airways (ANA), launch customer for the Boeing 787, said it will resume Dreamliner services from June 1, following the completion of a series of battery system modifications, safety checks and test flights.

ANA grounded its 787s in January after one of its aircraft was forced to make an emergency landing following an incident related to its lithium ion battery system.

The reintroduction of the 787 aircraft will result in partial amendments to ANA’s summer

flight schedule for international and domestic services, the company said in a statement.

“ANA will also introduce the 787 onto a further three international routes from this summer—Narita to Beijing and Shanghai and Haneda to Taipei—bringing the number of overseas destinations served by the 787 to five,” ANA said.

ANA president and CEO Osamu Shinobe said “Our engineers have worked closely with Boeing to undertake the required improvements and we are fully satisfied with the safety of our 787 fleet.”

International 787 services will resume June 1 on ANA’s 5X-weekly Narita-San Jose, Calif. ANA’s 7X-weekly Narita-Seattle, Wash. services will also resume from June 1 using a Boeing 777-300ER.

ANA said from June 1 it will introduce the 787 on the Haneda-Taipei route, replacing the 767-300ER; and the Narita-Beijing route, replacing the 737-700. From Aug. 1, ANA will introduce the 787 on the Narita-Shanghai Pudong route, replacing the 767-300ER.

The carrier will return the 787 on routes from Haneda to Frankfurt and Beijing from June 1. It will continue to suspend Chubu Nagoya-Seoul Incheon and Kansai Osaka-Seoul Incheon services.

Domestic 787 services will resume June 1 on flights between Haneda and Akita; Haneda-Toyama 787 flights will resume from July.