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DCA25LA241

2025-06-18 · Barlow Bend, Alabama, United States · Serious · 1 aircraft · Status: Completed

Current FAA registration · N8685B

Make / Model
BOEING 737-8H4
Year of manufacture
2016 · 9 years old at event
Engine
CFM INTL CFM56-7B27E
Seats / Engines
143 seats · 2 engines
Last airworthiness date
20160502
ADS-B equipped
Yes — Mode-S ABEF98

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The airplane’s encounter with unanticipated turbulence during descent, resulting in a serious injury to a flight attendant.

Factual narrative

Southwest Airlines flight 311 encountered unanticipated severe turbulence while descending through a thin cloud layer. The flight originated from Dallas Love Field Airport (DAL), Dallas, Texas, with a planned destination of Northwest Florida Beaches International Airport (ECP), Panama City, Florida. Prior to departure, the captain briefed the flight attendants (FAs) to remain seated during departure, due to cumulous cloud buildups and anticipated turbulence. While climbing to 37,000 ft (FL370), the flight encountered occasional light chop. After leveling off, the flight crew informed the FAs that they could perform their duties as assigned and turned the fasten seat belt sign off. According to the flight crew, during initial descent, at approximately FL340, the first officer made a public address (PA) announcement indicating that they had started their initial descent, to return to their seats and fasten their seatbelts for the remainder of the flight. The captain observed scattered cumulous clouds ahead of their flight path at approximately FL200 and told the FAs to secure the cabin and be seated early. The airplane descended through FL290 in a hazy cloud layer and encountered approximately 10-15 seconds of turbulence. During the turbulence encounter the autopilot disconnected, the airspeed fluctuated, and the airplane shook. The flight crew leveled off at FL270 and contacted the FAs. The flight crew were informed that several passengers and FAs were injured during the event. The flight crew notified company dispatch and air traffic control (ATC) of the turbulence encounter and the injuries. The remainder of the flight was uneventful. After parking at the gate, emergency medical services (EMS) met the airplane and transported three FAs and four passengers to the hospital for examination. One FA was diagnosed with a right ankle fracture and underwent surgery. Ten minor injuries were also reported and there was no damage to the airplane. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • — Environmental issues-Conditions/weather/phenomena-Turbulence-(general)-Awareness of condition
  • — Environmental issues-Conditions/weather/phenomena-Turbulence-(general)-Effect on personnel

Verbatim from NTSB's published report. Source file NTSB_2025_DCA25LA241.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Search this event elsewhere

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Related research

Matched on aircraft type or causal vocabulary (turbulence, autopilot). All research papers