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NTSB Report
August 24, 2021 · Boeing 737-990ER · N479AS
Seatac, WA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 24, 2021
Injury Outcomes
4 injuries (1 serious injury, 3 minor injuries), 130 uninjured
Location
Seatac, WA
Aircraft
Boeing 737-990ER (2015)
Tail Number
N479AS
Operator
Alaska Airlines
Injuries
Serious
NTSB Number
DCA21LA208
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.
NTSB Probable Cause
Aircraft-Aircraft oper/perf/capability-(general)-(general)-Related operating info
Full 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.
Flight
Event TypeAccident
Event Time20:45 PDT
Nearest AirportSeattle-Tacoma Intl (1nm N)
Flight Plan FiledIFR
Flight Plan ActivatedYes
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftBoeing 737-990ER
Tail NumberN479AS
Aircraft CategoryAir
OperatorAlaska Airlines
Operating RulePart 121
Engines2
Engine TypeTurbofan
Engine DetailsCfm Intl · CFM56-7B27E · Turbofan · 27300 | Cfm Intl · CFM56-7B27E · Turbofan · 27300
Seats222
People & Injuries
Injury Summary4 injuries (1 serious injury, 3 minor injuries), 130 uninjured
Fatal0
Serious1
Minor3
Uninjured130
Total134
Conditions
ConditionsVMC
LightDusk
Wind4 kt
Visibility10 sm
CeilingBroken clouds 7500 ft
Temperature / Dew Point63 F / 32 C
Altimeter29.89 inHg