SEOUL, March 14 (AJP) - A fire that broke out aboard Air Busan flight BX391 at Gimhae International Airport on Jan 28 was likely triggered by a short circuit inside a portable battery pack, also known as a power bank, according to an investigation by the National Forensic Service (NFS).
The Aviation and Railway Accident Investigation Board (ARAIB) under the Ministry of Land, Infrastructure, and Transport said Friday that forensic analysis revealed multiple traces of melted material on the remnants of a portable battery pack found in the aircraft cabin. This suggests an "insulation breakdown," where the battery’s positive and negative terminals are short-circuited, likely sparking the fire.
Due to extensive damage, the exact cause of the short circuit could not be determined. However, the investigation ruled out the possibility of the fire originating from the aircraft’s wiring or onboard systems.
"The battery remnants were extensively burned, making it challenging to determine the exact cause of the insulation breakdown based solely on the post-fire condition," the NFS stated in its report, adding: "No electrical abnormalities or fire-related damage were identified in the aircraft’s wiring, lighting fixtures, or circuit board remnants. This makes it highly unlikely that the fire originated from any part of the aircraft’s internal infrastructure."
Investigators believe the fire started in the overhead compartment above seat 30 on the left side of the cabin. A passenger video showed flames erupting from that area, and the burnt remains of the backup battery were later found on the floor near seat 31.
On Feb. 3, the ARAIB, NFS, police forensic team, and fire authorities conducted a joint investigation, collecting evidence from rows 28 to 32, including electrical wiring, lighting fixtures, and battery remnants. The materials were sent to the NFS for computed tomography (CT) scans and microscopic examinations.
"Based on our findings so far, we are focusing on the likelihood that the fire was caused by the power bank and will continue our investigation accordingly," the ARAIB stated. "If we identify any necessary safety measures during the investigation, we will issue safety recommendations to the airline and other relevant parties."
The agency pledged to determine the exact cause of the fire. "We will make every effort to uncover the precise cause of the incident. Further updates will be disclosed based on their potential impact on the ongoing inquiry."
Copyright ⓒ Aju Press All rights reserved.
View more comments