On November 28, 2025, at 1715 Taipei time, a National Air Service Corps (NASC) AS365 N3 helicopter, registration NA-108, departed Taichung Cing-Cyuan-Gang Airport (RCMQ) for an offshore night vision goggles training mission. At 1828, while positioned two nautical miles off the mouth of the Dajia River, the crew observed smoke emanating from beneath the center instrument panel. The crew maintained stable flight, executed emergency procedures, and initiated an immediate return to base. The aircraft landed safely at RCMQ at 1834. All crew members were unharmed, and the aircraft sustained no further damage.

After receiving the notification, the Taiwan Transportation Safety Board (TTSB) immediately dispatched 2 investigators to the field to collect information in accordance with the procedures for investigating aviation occurrences. This event was identified by the TTSB as a major aviation occurrence in accordance with the Transportation Occurrence Investigation Act. An official investigation has been launched and the investigation team will continue to collect relevant evidence.

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

Ya-Ting Chang, Director

Secretariat Office

Tel: +886-2-7727-6210

E-mail: yating@ttsb.gov.tw

Steven Su, Acting Director

Aviation Occurrence Investigation Division

TEL：02-77276311

Email：steven@ttsb.gov.tw