Primary finding
Probable cause
The passenger’s use of the evacuation slide resulted in the serious injury.
Investigator assessment
Analysis narrative
Even though an overheated passenger cell phone was put into a battery containment bag (BCB) by the cabin crew, a large amount of smoke remained in the cabin with a strong acrid smell. As a result, the captain commanded an evacuation on taxiway A spot 6A at the Seattle-Tacoma International Airport (SEA), Seattle Washington. One passenger broke their elbow while descending on the evacuation slide.