NTSB CAROL · Event
Event IAD03LA048
Aircraft involved
Probable cause & findings
The airplane's encounter with unforecasted clear air turbulence during cruise flight.
Factual narrative
On April 24, 2003, about 2235 eastern daylight time, a Fairchild-Dornier 328-300, N427FJ, operated by Atlantic Coast Airlines (ACA) as Delta Connection flight 6262, was not damaged after it encountered turbulence during cruise flight. There were no injuries to the two certificated pilots and five passengers; however, the flight attendant sustained serious injuries. An instrument flight rules (IFR) flight plan had been filed for the flight from Cincinnati/Northern Kentucky International Airport (CVG), Covington, Kentucky, to Roanoke Regional Airport (ROA), Roanoke, Virginia. Visual meteorological conditions prevailed for the flight conducted under 14 CFR Part 121. According to the captain, the flight was at cruise altitude at 22,000 feet in visual meteorological conditions. The airplane encountered a "light chop," so he kept the fasten-seatbelt sign illuminated. Without warning, the flight encountered "moderate turbulence" for 2 to 5 seconds. There was minimal altitude loss and the autopilot maintained control of the airplane. Following the turbulence encounter, the crew requested from air traffic control clearance to descend to 19,000 feet, where the remainder of the flight was smooth. The first officer provided a similar account of the events. In a written statement, the flight attendant stated that "continuous light turbulence" was encountered during the flight. While standing in the galley, the airplane suddenly encountered "severe clear air turbulence," which threw her against the bulkhead. As she regained her balance, the airplane encountered more turbulence, which knocked her to the floor. The flight continued to Roanoke Regional Airport and landed uneventfully. A review of the flight release that was issued to the pilots revealed a warning for occasional moderate turbulence below 12,000 feet for an area several hundred miles to the west of the airplane's route of flight. In addition, no SIGMETs or AIRMETs were issued for the Roanoke area. During cruise flight at 22,000 feet, the airplane encountered unforecasted clear air turbulence. The flight attendant, who was standing at the time, sustained serious injuries when she was thrown against the bulkhead, then to the floor. Following the turbulence encounter, the airplane continued to its destination and landed uneventfully. A review of the flight release that was issued to the pilots revealed a warning for occasional moderate turbulence below 12,000 feet for an area several hundred miles to the west of the airplane's route of flight. In addition, no SIGMETs or AIRMETs were issued for the Roanoke, Virginia, area. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2003_IAD03LA048.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (turbulence, autopilot). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- 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.
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
Political Turbulence and Aviation Safety: A Cross-National Analysis of Political Stability's Effects on Aviation Accidents
To what extent does political stability affect aviation safety? This research aims to link domestic political conditions and public safety through the consideration of aviation accident frequency.
- 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…
- arXiv 2025 · arXiv preprint
ROSplane 2.0: A Fixed-Wing Autopilot for Research
Unmanned aerial vehicle (UAV) research requires the integration of cutting-edge technology into existing autopilot frameworks.
- 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.
- arXiv 2024 · arXiv preprint
Does small-scale turbulence matter for ice growth in mixed-phase clouds?
Representing the glaciation of mixed-phase clouds in terms of the Wegener-Bergeron-Findeisen process is a challenge for many weather and climate models, which tend to overestimate this process because…
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