제조사인 한국항공우주산업, 즉 KAI가 지상 정비에 나섰고 지난 17일 시험 비행을 하다 사고가 났다는 겁니다.
The manufacturer, Korea Aerospace Industries, KAI, had started ground maintenance and that it had an accident on the 17th when it was on a test flight.