Date: 30th November 2024
Location: Near Guilin, China
Aircraft: Airbus A320-200, registration B-6719
Operator: Sichuan Airlines
Flight Number: 3U-8925
Route: Chengdu to Xiamen, China
Occupants: Unknown
Injuries: None reported
Summary of Events
On 30th November 2024, Sichuan Airlines flight 3U-8925, operating from Chengdu to Xiamen, experienced an in-flight safety issue when a passenger’s power bank began emitting smoke. The incident occurred at an altitude of FL351, approximately 40 nautical miles south of Guilin. The crew promptly declared an emergency and diverted to Guilin Liangjiang International Airport, where the aircraft landed safely on Runway 19.
After a ground delay of approximately 100 minutes for inspection and safety clearance, the flight resumed and reached Xiamen with a delay of about 2 hours.
Aircraft Information
The Airbus A320-200 is a short-to-medium-haul twin-engine aircraft commonly used for passenger services. The cabin systems are equipped with smoke detectors and extinguishers to manage in-flight incidents such as electrical fires or overheating of electronic devices.
Sequence of Events
1. Enroute Incident:
• While cruising at FL351, cabin crew identified smoke emanating from a power bank carried by a passenger.
• Immediate actions were taken to isolate the device and manage the smoke.
2. Diversion Decision:
• The crew assessed the situation and determined that a diversion to Guilin was necessary for safety.
• The aircraft began its descent and was cleared for landing at Guilin Liangjiang International Airport.
3. Safe Landing:
• The aircraft landed safely on Runway 19 approximately 30 minutes after initiating the descent.
• Emergency services were on standby but were not required as the smoke had been contained.
4. Inspection and Continuation:
• Ground teams conducted an inspection of the cabin and systems to ensure no further risks.
• The flight resumed its journey to Xiamen after a delay of 100 minutes.
Initial Findings
Cause of Smoke Emission
1. Battery Overheating (Thermal Runaway):
• The power bank likely experienced a thermal runaway due to internal failure, leading to smoke generation.
2. Improper Storage or Handling:
• The device may have been stored improperly, such as in a manner that caused it to overheat.
3. Undetected Defect:
• A manufacturing defect or prior damage to the battery could have caused the malfunction.
Safety Risks
1. Cabin Fire Hazard:
• Lithium-ion batteries in power banks can pose a significant fire risk if not handled properly.
2. Passenger Panic:
• Smoke in the cabin can lead to panic, increasing risks during critical phases of flight or evacuation.
3. Diversion Consequences:
• Diversions can disrupt schedules and operations, impacting passengers and crew.
Recommendations
1. Passenger Awareness:
• Airlines should reinforce communication on the proper use and storage of power banks, including observing no-smoking signs and carrying devices in cabin luggage only.
2. Pre-Flight Checks:
• Enhance pre-flight checks and announcements to verify that passengers are aware of restrictions on carrying and using electronic devices.
3. Crew Training:
• Reinforce training for cabin crew on managing electronic device fires, including quick containment and use of fire-resistant storage bags.
4. Incident Reporting:
• Establish clear guidelines for documenting and investigating incidents involving electronic devices to identify trends and improve safety measures.
Safety Lessons and Industry Impact
This incident highlights the ongoing risks associated with lithium-ion batteries in electronic devices. Proper passenger education and crew training are critical to mitigating risks. Quick response by the crew and effective diversion ensured a safe outcome. The airline’s post-incident communication regarding power bank usage serves as a valuable reminder for the industry.
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Our investigation reports are based on all the evidence and facts we have at the time of writing and posting. We apologise if any details are missed or are not fully accurate.
