In cooperation with MOTC Railways Supervision Task Force, BOHSR conducted the provisional inspection on Dec. 19, 2014 regarding the Alishan Forest Railway derailment accident at 37K of Chiayi Branch. Due to categorization of this accident as a "major operation accident" according to Article 122-1 of Regulation of Railway Operation, the incident was investigated under Article 41 and 56-5 of Railway Law. In addition, railway experts were also invited to assist on this case and find its cause.
Alishan Forest Railway Administration Office held the Rail Accident Investigation Committee Meeting on Nov. 21 to identify the cause of the accident. The root of this accident was traced to incomplete curve adjusting and tamping maintenance procedures which caused over-height of railway. This resulted in insufficient ballast and soft trackbed, which caused the Rolling stock wheels to derail when entering the curve.
Railway Supervision Task Force Deputy Chief Engineer G. C. Chen and two other external members led the examination team to the 37K derailment site for onsite inspection, documentation examination and interviews with personnel. The investigation contents covered patrol records, examination and maintenance records, operational accident records, derailment accident data and improvement measures.
The provisional inspection came to an end in the evening in which the preliminary results were in consistence with appraisal of the Rail Accident Investigation Committee. The investigation report will be generated subsequently and will be submitted to Forestry Bureau and Alishan Forest Railway Administration Office for future improvement.