DCA26LA286

NTSB accident investigation · Embraer S A ERJ 170-200 LL · Sanford, FL · July 16, 2026

Accident · Serious injuriesClass 4 · LimitedFinal report
Date
July 16, 2026, 15:02 local (19:02 UTC)
Place
Sanford, FL
Injuries
1 serious, 70 uninjured
Damage
No damage
Phase of flight
Enroute
Aircraft
N271SYEmbraer S A ERJ 170-200 LL
Defining event
Enroute-cruise: Turbulence encounter
Weather
Visual (VMC) · Day
Status
Completed · report October 22, 2026
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Major Investigations Division
Parties
FAA
FAA report
20260716009989A
Case key
203413

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

An encounter with convectively induced turbulence during cruise flight in an area of forecast thunderstorm activity.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Turbulence: convective turbulenceEnvironmental issues › Conditions/weather/phenomena · Effect on personnelEmbraer S A ERJ 170-200 LL: 1 caseAll aircraft: 145 casesProbable cause
Turbulence: convective turbulenceEnvironmental issues › Conditions/weather/phenomena · Effect on operationEmbraer S A ERJ 170-200 LL: 1 caseAll aircraft: 145 cases
Turbulence: convective turbulenceEnvironmental issues › Conditions/weather/phenomena · Awareness of conditionEmbraer S A ERJ 170-200 LL: 1 caseAll aircraft: 145 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

On July 16, 2026, about 1502 eastern daylight time, SkyWest Airlines, operating as Delta Connection flight 3723, encountered severe turbulence while in cruise flight at FL370 en route to Hartsfield/Jackson Atlanta International Airport (ATL), Atlanta, Georgia. Of the 71 passengers and crew members aboard, one flight attendant sustained a serious injury. The flight was operating under 14 Code of Federal Regulations Part 121 as a regularly scheduled international passenger flight from North Eleuthera Airport (ELH), North Eleuthera, Bahamas, to ATL. According to the flight crew, after departure they received an instrument flight rules (IFR) clearance to ATL with an initial climb to FL230, followed by FL340. During the climb, they encountered light turbulence associated with nearby cloud tops and requested a higher altitude to improve ride quality. The flight was subsequently cleared to FL360. After turning northbound, air traffic control (ATC) asked if they would prefer FL350 or FL370; the crew accepted FL370. The flight then continued in smooth air for about 50 minutes. As the flight progressed, the flight crew observed cumulonimbus clouds along the route of flight and requested a deviation to the right. Flight attendants (FA) were advised of the potential for turbulence and told to use caution. While the fasten seat belt sign remained illuminated. ATC was unable to approve the request but authorized a deviation to the left. After completing the deviation, the flight was cleared direct SHRKS. About 6 minutes later, the airplane encountered severe turbulence that lasted approximately 5 seconds. The flight crew reported no visual indications of impending turbulence from the flight deck and no corresponding returns on the onboard weather radar. During the encounter, the airplane experienced a loss of airspeed and activation of the stick shaker. The captain called "upset" and initiated recovery procedures. The airplane lost about 300 to 400 ft before recovery was completed and cruise flight at FL370 was resumed. At the time of the turbulence encounter, the forward flight attendant was in the forward galley after completing cabin service. During the turbulence encounter, she braced herself and then took her jumpseat. Following the encounter, passengers requested assistance after observing the aft flight attendant lying on the rear galley floor, having reportedly struck her head during the turbulence encounter. The forward flight attendant solicited assistance from medically qualified passengers, who evaluated and assisted the injured flight attendant. She subsequently notified the flight crew of the injury and checked for additional passenger injuries. After receiving notification of the injury, the flight crew coordinated with company dispatch and diverted to Jacksonville International Airport (JAX), Jacksonville, Florida, where emergency medical services met the airplane upon arrival. The FA was subsequently transported to a hospital and wasdiagnosed with a serious injury. At the time of the turbulence encounter the National Weather Service (NWS) Aviation Weather Center had issued a Convective Significant Meteorological Information (SIGMET) for an area of thunderstorms moving from 340° at 5 knots, with tops above FL450 for the area. In addition, a Center Weather Advisory was also issued for an area of embedded thunderstorms with tops to FL420, with moderate to heavy precipitation over northern Florida and southern Georgia. A review of meteorological and satellite information indicated that the route of flight was over an area of rapidly developing thunderstorms, with echoes and very strong updraft potential which likely caused the convectively induced turbulence (CIT) encounter. The echoes under the flight path rapidly rose through the aircraft’s altitude immediately following the turbulence encounter and cloud-to-ground lightning was detected in the immediate vicinity.

Aircraft

Registration
N271SY
Reported as
Embraer S A ERJ 170-200 LL
Category
Airplane
Serial number
17000729
Built
2018
Airframe hours
18,475.4
Engines
GE CF34-8E5A2HA, 14,500 lbs thrust, turbo fanGE CF34-8E5A2HA, 14,510 lbs thrust, turbo fan
Damage
No damage
Flight
Part 121
Operator
Skywest Airlines Inc
Registered owner
Skywest Airlines Inc
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · July 13, 2026
Departed
North Eleuthera, OF
Destination
Atlanta, GA
Flight plan
IFR
Equipment
ADS-B, Angle of attack indicator, Auto-pilot, Data recorder, Electronic flight bag or handheld device, Electronic multifunction display, Electronic primary flight display, Onboard weather, Satellite tracking device, Stall warning system

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
32
Injuries
None
Certificates
Airline transport, Commercial
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
March 22, 2026
Seat
Left
Flight hours
3,180 total · 3,180 in this make and model · 2,132 as pilot in command
Role
Co-pilot
Age
25
Injuries
None
Certificates
Airline transport, Commercial
Airplane ratings
Multi-engine sea
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
December 13, 2025
Seat
Right
Flight hours
604 total · 604 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 2 knots
Visibility
10 statute miles
Lowest ceiling
11,000 ft broken
Temperature
91 °F, dew point 73 °F
Altimeter
30.00 inHg
Turbulence
Severe
Observed at
KSFB, 16 nm away

Docket · 2

The files NTSB released with the investigation on October 22, 2026, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.5 MB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.