About thirty minutes out from Dallas Fort Worth, a pilot on American Airlines Flight 2398 keyed the mic and told air traffic control something no controller wants to hear.
“Cabin fire in the back of the airplane. The flight attendants are trying to put it out now.”
A moment later, per audio obtained by CBS News, came the detail that turned a routine Friday evening arrival into a federal investigation: “I think we have about four to five passengers that were burned by the laptop. The laptop is contained about mid-aircraft.”
The Airbus A321, which had left Atlanta earlier that afternoon, landed at DFW around 6:55 p.m. local time on August 21 and taxied to the gate under its own power with emergency crews waiting. One passenger was treated for minor burns. The laptop spent the rest of the descent inside a thermal containment bag.
What happened
- The flight: American Airlines 2398, Atlanta to Dallas Fort Worth, Friday August 21, an Airbus A321
- The device: a passenger’s laptop, which the FAA says caught fire in the battery
- The response: cabin crew contained the device in a thermal containment bag before landing
- Injuries: the pilot’s initial call mentioned four or five people burned. One passenger was ultimately treated for minor burns.
- The airline: “American Airlines flight 2398 landed safely at DFW after reports of smoke from a customer’s device during landing. We thank our crew for their professionalism and swift response to quickly contain the device.”
- Now: the FAA has opened an investigation, with lithium ion battery safety at the center of it
What thermal runaway actually is
The FAA’s own description is admirably blunt. All lithium ion batteries are “capable of overheating and undergoing a process called thermal runaway,” which “can occur without warning as a result of various factors, including if the battery is damaged, overheated, exposed to water, overcharged, or improperly packed.” It can also happen entirely on its own, from a manufacturing defect that has been sitting quietly inside the cell since the day it was made.
Underneath the phrase is a feedback loop. A lithium cell holds a lot of energy in a very small space, separated by a plastic film thinner than a human hair. If that separator is punctured, degraded or heated past its limit, the two sides of the cell touch. That short circuit releases heat. The heat degrades more separator. That releases more heat. Within seconds the chemistry inside starts breaking down and generating its own oxygen, which is why a lithium fire is so hard to smother: it does not need the air in the cabin to keep burning.
The gap between four or five and one
The pilot’s transmission said four to five passengers had been burned. The final count was one, treated for minor burns. That gap is worth sitting with rather than skipping past, because it is not a contradiction so much as a snapshot of how these calls work.
A flight deck crew gets a shouted report from the back of a moving cabin while running a descent, and passes on the worst plausible version immediately, because the people on the ground need to know what to roll before the aircraft touches down. Overstating early costs nothing. Understating early costs a lot. The number you hear on the radio is a resource request, not a medical finding.
The bag is the reason this is a news story and not a disaster
Thermal containment bags are fireproof pouches, standard equipment on US carriers, designed for exactly this. A crew member drops the burning device inside, seals it, and the bag holds the flame, the heat and most of the toxic vent gas until the aircraft is on the ground. Some carriers pair them with a water dousing procedure, because water is not there to smother a lithium fire, which cannot be smothered, but to cool the surrounding cells fast enough that the fire does not spread through the pack.
None of that works if the device is in the hold. This is the entire logic behind the FAA’s rules, and it explains why the regulations look strangely lopsided when you first read them: spare batteries are effectively banned from checked luggage while being fine in the cabin.
| The rule | What it means in practice |
|---|---|
| Spare batteries and power banks: carry on only | Never in checked luggage. This includes phone battery cases. |
| Gate checked bags must be emptied of them | If your roller gets taken at the door, pull the power bank out and keep it with you |
| Terminals must be protected | Original packaging, a case, or tape over the contacts. Loose batteries rolling around a bag are the classic short circuit. |
| Lithium ion limit: 100 watt hours per battery | Covers essentially every phone, tablet, camera and laptop a normal person owns |
| 101 to 160 Wh: airline approval, max two spares | Big camera rigs, some mobility and pro video gear. Ask before you get to the airport. |
| Lithium metal limit: 2 grams of lithium | The non rechargeable ones. Think watch cells and some camera batteries. |
| Power banks in plain view while in use | A newer airline level rule, not an FAA one, and increasingly common. Do not charge inside a closed bag or the seat pocket. |
Where your gear sits against the 100 Wh line
Watt hours are not printed on most devices, but they are easy to work out. Take the milliamp hour rating, multiply by the voltage, divide by 1,000. A 20,000 mAh power bank at 3.7 V is 74 Wh, comfortably legal. The number matters because the rule is per battery, not per bag, and because the closer a device sits to that ceiling, the more energy is available to release if things go wrong.
How often this actually happens
Often enough that the FAA maintains a public database of it. The agency logged 93 lithium battery incidents in 2025 involving batteries that smoked, ignited or produced extreme heat aboard aircraft, up roughly 4.5 percent on the year before. Eighty of those were on passenger aircraft, thirteen on cargo. That works out to close to two events a week across the US system.
Almost none of them make the news, because almost all of them end the way this one did: a crew notices smoke, applies a procedure they have trained for, and the aircraft lands normally. David Wroth of UL Standards and Engagement put the counterargument neatly, saying that any fire at 30,000 feet is unacceptable, and the trend line is what has pushed carriers into rules the FAA never wrote. Several airlines now require power banks to stay visible while charging, and some have banned charging from in seat power entirely.
The part the rules cannot fix
The devices most likely to fail are cheap, uncertified batteries and older packs that have been swelling for months. Neither is covered by a watt hour limit, because both are usually well under it. A puffy battery is not a cosmetic problem, it is a cell that has already started venting gas internally, and it is the single clearest warning sign you will ever get.
What to do before your next flight
- Check whether anything you own is swollen. A laptop that no longer sits flat, a trackpad that clicks strangely, a phone with a lifting screen. Stop using it and replace the pack.
- Keep the laptop out of the seat pocket. Devices get crushed by reclining seats more often than people expect, and physical damage is trigger number one. When the seat in front goes back, move the machine.
- Never charge inside a closed bag. Trapped heat is the other half of the equation.
- Tape or case any loose spare cells. Two minutes with electrical tape removes an entire failure mode.
- Buy certified. The unbranded 30,000 mAh bargain is where the defect rate lives, and it is disproportionately represented in incident reports.
- If a device gets hot, tell the crew immediately. They have the bag, they have trained for it, and every minute of hesitation is a minute the pack gets hotter.
None of this is exotic maintenance. Most of it is the same battery hygiene that keeps a device useful for years rather than months, and if you have never checked, it takes minutes: here is how to read your battery health on Android without rooting anything, and a rundown of why an iPhone runs hot while charging and when that heat stops being normal.
The FAA investigation will presumably work out which laptop, which cell supplier and whether the battery had been damaged. That answer will take months and will matter mostly to the manufacturer. The part that matters to everyone else already happened at 15,000 feet over Texas, when a crew got a burning object into a bag before it reached the second cell.
