DCA23LA252
2023-04-22 · Atlantic Ocean, Atlantic Ocean, United States · Serious · 1 aircraft · Status: Completed
Current FAA registration · N770AN
- Make / Model
- BOEING 777-223
- Year of manufacture
- 1999 · 24 years old at event
- Engine
- ROLLS-ROYC RB-211 SERIES
- Seats / Engines
- 440 seats · 2 engines
- Last airworthiness date
- 19990121
- ADS-B equipped
- Yes — Mode-S AA6914
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
An encounter with inadvertent convective turbulence during cruise flight.
Factual narrative
American Airlines flight 748 experienced turbulence enroute to Comunidad De Madi (MAD), Madrid, Spain. As a result of the turbulence, three flight attendants sustained injuries, two being serious, while one passenger sustained a minor injury. The airplane was not damaged, and the flight crew continued to MAD where they were met by emergency medical technicians (EMTs) upon landing. The flight was a regularly scheduled passenger flight from Charlotte International Airport (CLT), Charlotte, North Carolina to MAD. The flight crew reported having a view of lightning at about an 11 o’clock position. The onboard radar also indicated rain ahead of them. Upon confirming that the sky above them was clear of any cloud cover or weather, the flight crew requested an up to 20-mile deviation of course to avoid the weather ahead, to which air traffic control (ATC) approved. As they approached the area where the radar had previously shown that there was rain, the radar was no longer showing rain and the flight crew could see no signs of rain directly ahead of them. The flight crew reported attempts to reference both of their personal weather apps to confirm the weather shown on the cockpit radar but was unsuccessful due to the lack of internet connection. Because of this, the flight crew concluded the weather to have passed and subsequently decided to no longer deviate from the original course. The unexpected turbulence event was experienced soon after. The flight crew reported that the turbulence was sudden and came without warning. The cabin crew reported they were preparing for arrival service into MAD when they experienced a “sudden loss in altitude” and a series of jolts. The flight and cabin crew both reported that the turbulence lasted around 30 - 40 seconds and that flight crew reported that the autopilot disengaged but did not cause a deviation in altitude of more than 200 feet. Three flight attendants reported they were preparing the back galley for meal service when the unexpected turbulence occurred, causing all three flight attendants to be thrown in the air and “slammed” on the floor. The flight attendants also reported that a passenger was thrown in the air and hit their head. After landing, the three flight attendants were seen by EMTs, and all were taken to the local hospital for further care. The flight crew was aware of thunderstorms in the area, subsequently the seatbelt sign was on, but no announcement was made to inform passengers or cabin crew of potential turbulence. The flight crew informed ATC about the injuries and requested EMTs to meet the airplane upon arrival. 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-Accuracy of related info
- — Personnel issues-Physical-Impairment/incapacitation-Illness/injury-Cabin crew
- — Environmental issues-Conditions/weather/phenomena-Convective weather-(general)-Effect on personnel
Verbatim from NTSB's published report. Source file
NTSB_2023_DCA23LA252.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 ↗
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Related research
Matched on aircraft type or causal vocabulary (turbulence, autopilot, 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 ROSflight 2.0: Lean ROS 2-Based Autopilot for Unmanned Aerial Vehicles
ROSflight is a lean, open-source autopilot ecosystem for unmanned aerial vehicles (UAVs). Designed by researchers for researchers, it is built to lower the barrier to entry to UAV research and acceler…