On December 8, 2023, at 0729 Taipei time, a Daily Air BK-117 helicopter, registration number B-55507, took off from Tongfu Village in Dongpu, Nantou, along the Chen You Lan River to perform a high-altitude supply mission to Guangau. After climbing to approximately 10,000 feet and reaching the 209 forestland according to the flight plan, it was discovered that the external load attached to the aircraft had detached unintentionally. The aircraft immediately returned and landed at the Tongfu temporary landing field at 0748. Both crew and aircraft were safe.

After receiving the notification, the Taiwan Transportation Safety Board (TTSB) immediately dispatched 3 investigators to the field to gather information in accordance with the procedures for investigating aviation occurrences. This event was identified by the TTSB as an aviation occurrence in accordance with the Transportation Occurrence Investigation Act. An official investigation has been launched and the investigation team will continue to gather relevant evidence.

Further information and progress of the occurrence investigation will be published on the TTSB website.

Vivi Yang, Secretariat Office
Tel: +886-2-7727-6217
E-mail: viviy2314@ttsb.gov.tw

Daniel Liu, Director of Aviation Occurrence Investigation Division
Tel: +886-2-7727-6285
E-mail: daniel.liu@ttsb.gov.tw