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Accidents · NTSB DCA17CA005 · Final report

Boeing 737-8H4 accident near Denver, Colorado, October 5, 2016

On October 5, 2016 at about 11:25 pm local time, a 2012 Boeing 737-8H4, registered N8324A, was involved in an accident during standing (engine(s) not oper) near Denver, Colorado (Denver International Airport). It was flown under scheduled airline rules (Part 121). 1 person was seriously injured; 178 others were unhurt. The weather was conditions the NTSB did not record.

The NTSB's probable cause their words, unchanged

the flight attendant losing her balance as she was removing her carry-on baggage resulted in her falling against an arm rest causing the serious injury.

Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.

What the record shows

Date
October 5, 2016 · about 11:25 pm local time
Place
Denver, Colorado · Denver International Airport · map
Type
Accident
Injuries
1 person was seriously injured; 178 others were unhurt.
Weather
conditions the NTSB did not record
Aircraft
Boeing 737-8H4 8H4, built 2012 · all 737-8H4s on the register
Registration
N8324A · registry record · serial 35966
Damage
Not recorded
Flight
Flight · scheduled airline rules (Part 121)

The NTSB's narrative final · quoted from the NTSB record

On October 5, 2016, at about 1725 MDT, Southwest Airlines flight 3663, Boeing B737-800, N8324A, after arrival into Denver International Airport (KDEN), Denver, Colorado, the "B" position flight attendant lost her balance while retrieving her carryon bag from an overhead bin. The flight attendant fell against a seat arm rest near her right rib area. She was examined by paramedics and later escorted to a local hospital for further evaluation. An X-ray identified the flight attendant had sustained a fractured rib.  The flight was operated as a 14 Code of Federal Regulations Part 121 domestic passenger flight from Salt Lake City International Airport (KSLC) , Salt Lake City, Utah, with 2 pilots, 4 flight attendants and 173 passengers on board. After the event, the injured flight attendant stated they had finished their day in Denver and while retrieving her bag from the overhead bin she stepped back and lost her balance. She thought her foot may have caught on the bar underneath a seat. She fell onto a row of seats making contact with an arm rest. She heard a crack in her rib area and it was difficult to breathe.  The "C" flight attendant got help, the crew came back and paramedics were called.

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.

The factual record from the NTSB's investigation tables, in plain English

What happened, in order

  1. Cabin safety event during standing (engine(s) not oper) defining event

The NTSB's findings

  • cause Personnel issues › Task performance › (general) › (general) › Cabin crew

The aircraft

  • Landing gear: retractable
  • Engine 1: Cfm Intl CFM56-7B27E; 0 hours total
  • Engine 2: Cfm Intl CFM56-7B27E; 0 hours total
  • Operator: Southwest Airlines

The flight

  • Departed from: KSLT Salt Lake City UT
  • Destination: KDEN Denver CO
  • A second pilot was aboard

Weather at the time

  • Light: dusk
  • Temperature: 0°F (-18°C), dew point 0°F (-18°C)

Injuries

FatalSeriousMinorNone
Cabi13
Flight crew2
Passengers173

Documents from the investigation the NTSB's docket: the evidence folder behind the report

2 documents, released by the NTSB on April 16, 2020. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.

The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.

Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.