A Growing Threat in Aviation
The FAA has issued a new Safety Alert for Operators (SAFO 25002) in response to the increasing number of incidents involving lithium batteries in both aircraft cabins and cargo holds. These events pose a serious threat to flight safety, as a battery fire can ignite suddenly and be difficult to control.
The agency recommends that airlines strengthen their internal control mechanisms, update training for both flight and ground crews, and increase focus on passenger awareness regarding the proper handling of electronic devices.
Thermal Runaway: The Core Issue
At the core of the risk is a phenomenon known as thermal runaway—a process where a lithium battery begins to overheat and uncontrollably release energy. This condition can be triggered by:
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mechanical damage to the battery,
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excessive exposure to heat,
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a short circuit or a manufacturing defect.
Once thermal runaway begins, it cannot be stopped by conventional cooling methods. The battery can erupt in flames, release toxic gases, or even explode.
Recommendations for Airlines
The FAA recommends that airlines:
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review their procedures for handling dangerous goods,
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have specialised containment bags or containers ready on board for faulty batteries,
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pay increased attention to the transport of spare batteries in carry-on luggage,
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thoroughly train crews in procedures for extinguishing battery fires.
Emphasis is also placed on engaging with passengers to ensure they are better informed about what is permitted for transport and how to react if a device shows signs of overheating.
A Global Issue
Incidents involving lithium batteries are not limited to the United States. The European Union Aviation Safety Agency (EASA) and the International Civil Aviation Organization (ICAO) have also issued similar warnings in the past. The number of batteries on board aircraft is increasing globally—from mobile phones and laptops to power banks and e-cigarettes.
The FAA’s alert serves as a reminder that lithium batteries represent one of the most significant current challenges to aviation safety. Whether these risks can be successfully minimised will depend not only on airline technology and procedures but also on the responsible behaviour of passengers themselves.
Source: FAA, EASA
