Establishment of the Investigation Team for the Combustion Anomaly during the Static Firing Test of the Epsilon S Second-Stage Motor

Japan Aerospace Exploration Agency

 On November 26, 2024 (JST), Japan Aerospace Exploration Agency (JAXA) conducted a static firing test of the Epsilon S second-stage motor at Tanegashima Space Center. During the test, a combustion anomaly occurred, resulting in an explosion of the motor.

 We express our deepest regrets to the various individuals and organizational stakeholders including the local community, for not being able to meet the expectations, and for the inconvenience and concerns this incident may have caused.

 As it follows a similar anomaly observed during a static firing test conducted in July 2023, JAXA is taking this matter seriously and has immediately established “the Investigation Team for the Combustion Anomaly during the Static Firing Test of the Epsilon S Second-Stage Motor” on November 26, 2024, to determine the cause of the incident and formulate countermeasures. The team is headed by Mr. Okada, Director of the Space Transportation Technology Directorate, and comprises members of JAXA’s senior management, including board members.

 The Epsilon S launch vehicle, an enhanced version of the Epsilon series, is planned to be launched as “Epsilon-7”.

 We will continue to provide updates on the progress of the investigations.