
Core Viewpoint - On June 30, 2023, Spring Airlines Japan's flight IJ004 experienced a mechanical failure during its journey from Shanghai Pudong to Tokyo, leading to a rapid descent and emergency landing in Osaka [6][7]. Group 1: Incident Details - The flight took off from Shanghai Pudong at 17:49 and was scheduled to arrive in Tokyo at 21:47 local time [6]. - During the flight, the aircraft, a Boeing 737-800 with an age of 7.1 years, experienced a sudden drop from an altitude of over 11,000 meters to approximately 3,200 meters within ten minutes [6]. - The incident was confirmed by flight monitoring software, which showed a significant altitude decrease [6]. Group 2: Company Background - Spring Airlines Japan was established in 2012 as a joint venture between Spring Airlines and Japan Airlines, with Japan Airlines becoming the majority shareholder in June 2021, retaining 33% ownership by Spring Airlines [7]. Group 3: Response and Current Status - As of the report, Spring Airlines Japan had not responded to inquiries regarding the incident [8]. - All other flights operated by Spring Airlines were reported to be running normally [6].