DCA21LA058
2020-12-23 · Houston, Texas, United States · Serious · 1 aircraft · Status: Completed
Current FAA registration · N463UA
- Make / Model
- AIRBUS INDUSTRIE A320-232
- Year of manufacture
- 2000 · 20 years old at event
- Engine
- IAE V2500SERIES
- Seats / Engines
- 200 seats · 2 engines
- Last airworthiness date
- 20000922
- ADS-B equipped
- Yes — Mode-S A5A683
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
an encounter with forecasted convective turbulence during approach.
Factual narrative
On December 23, 2020, about 1230 central standard time, United Airlines flight 1481, an Airbus A320-232, N463UA, encountered turbulence during approach into George Bush International Airport (KIAH), Houston, Texas. Of the 140 passengers and crew onboard, one flight attendant sustained serious injuries. The airplane was not damaged. The regularly scheduled domestic passenger flight was operating under the provisions of 14 Code of Federal Regulations Part 121 from John Wayne Airport (KSNA), Orange County, California, to KIAH. According to the flight crew, while reviewing the preflight weather, they noted rain showers and thunderstorms in the vicinity of KIAH for their arrival time. As the flight descended into KIAH, the flight crew observed numerous cumulous clouds in the area and between 12,000 and 10,000 feet, the captain “double chimed” the cabin (indicating that the cabin should be secured early) and made a public address (PA) announcement, stating “flight attendants take your jumpseats.” Shortly thereafter, the aircraft penetrated a towering cumulous cloud. At the time the PA announcement was made, the flight attendants (FA) were conducting their before landing cabin checks. When the turbulence was encountered, the lead FA was secured in her jumpseat, but the two other FAs had just reached the aft galley and were about to sit down. One of the aft FAs was thrown to floor resulting in severe pain and numbness down both legs. The uninjured FA assisted her buckling into the jumpseat where she remained for the rest of the flight. Paramedics met the airplane at the gate and transported the injured FA to the hospital where she was diagnosed with a fractured pelvis. Post accident review of the weather indicated an area of convective turbulence from a developing area of thunderstorms immediately south and directly downwind of the flight track about the time the injury occurred. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
FAA avdata. C = Cause, F = Factor.
- — Environmental issues-Conditions/weather/phenomena-Turbulence-Convective turbulence-Effect on personnel
Verbatim from NTSB's published report. Source file
NTSB_2020_DCA21LA058.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Search this event elsewhere
External sources are reported, not agency: signal that something happened, not fact about what happened.
- TallyAero Live Wire Aviation press
- NTSB CAROL Agency ↗
- NTSB Docket Agency ↗
- Aviation Safety Network Aviation press ↗
- Kathryn's Report Aviation press ↗
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Related research
Matched on aircraft type or causal vocabulary (turbulence, thunderstorm). All research papers
- NASA NTRS 2019 · Contractor Report (CR) An Examination of Aviation Accidents Associated with Turbulence, Wind Shear and Thunderstorm
The focal point of the study reported here was the definition and examination of turbulence, wind shear and thunderstorm in relation to aviation accidents.
- NASA NTRS 2019 · Reprint (Version printed in journal) Observations of severe turbulence near thunderstorm tops
Data derived from the flight tapes of two airliners that experienced severe turbulence near thunderstorm tops are used to produce quantitative descriptions of the turbulence and its environment.
- NASA NTRS 2019 · Conference Proceedings Operational evaluation of thunderstorm penetration test flights during project Storm Hazards '80
The National Aeronautics and Space Administration is conducting a research project called Storm Hazards '80 in order to study the prediction, detectability and avoidance of the hazards of severe storm…
- NASA NTRS 2019 · Reprint (Version printed in journal) Severe Turbulence and Maneuvering from Airline Flight Records
Digital flight records from reported clear-air turbulence incidents are used to determine winds and turbulence, to determine maneuver g loads, and to analyze control problems.
- arXiv 2026 · arXiv preprint Direct Numerical Simulations of Ice-Ocean Boundary Turbulence
Turbulent heat and freshwater transport at ice-ocean interfaces controls glacier and iceberg melt rates, yet the underlying physics remains poorly constrained.
- arXiv 2025 · arXiv preprint Explainable LiDAR 3D Point Cloud Segmentation and Clustering for Detecting Airplane-Generated Wind Turbulence
Wake vortices - strong, coherent air turbulences created by aircraft - pose a significant risk to aviation safety and therefore require accurate and reliable detection methods.