DCA20CA122

NTSB accident investigation · Embraer ERJ170 · Plainfield, IL · July 9, 2020

Accident · Serious injuriesClass 4 · Data collectionFinal report
Date
July 9, 2020, 17:00 local (22:00 UTC)
Place
Plainfield, IL
Injuries
1 serious, 1 minor, 63 uninjured
Damage
No damage
Phase of flight
Enroute
Aircraft
N226NNEmbraer ERJ170
Defining event
Enroute-descent: Turbulence encounter
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Major Investigations Division
Case key
101598

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 convective turbulence.

Findings · 1

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 LR: 3 casesAll aircraft: 145 casesProbable cause

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 9, 2020, at about 1500 central daylight time, Envoy Airlines flight 3880, an Embraer 175, N226NN, encountered turbulence during descent into Chicago O’Hare International Airport (KORD), Chicago, Illinois. One flight attendant sustained serious injuries and one flight attendant sustained minor injuries. The airplane was not damaged. The regularly scheduled passenger flight was operating under the provisions of 14 Code of Federal Regulations Part 121 from El Paso International Airport (KELP), El Paso, Texas, to KORD. According to the flight crew, about 10 minutes prior to top of descent, they turned the seatbelt sign on after encountering a small pocket of light turbulence. Shortly after beginning the descent, the flight crew noticed cumulus clouds in the descent/approach path and the first officer (FO) called the flight attendants (FA) to notify them to expect turbulence during the descent. As the flight descended through about 15,000 feet and approaching several cumulus clouds, the FO again called the FAs and told them the flight would hit turbulence in about 60 seconds. Shortly after, when the flight was descending through about 12,500 feet, it encountered two sudden moderate turbulence “bumps”. According to the FAs, after being advised by the FO of the impending turbulence, FA 1 made a public address announcement to the passengers in preparation for landing. Both FAs were collecting trash and completing their compliance checks when the first turbulence hit the airplane, sending both FAs into the air and onto the floor. When the second turbulence event occurred a few seconds later, FA 2 was thrown almost to the ceiling and then onto an armrest, injuring her left arm. FA 2 had to remain on the cabin floor for the remainder of the flight due to her injuries. The flight crew declared an emergency and was given expedited vectors for landing. Paramedics met the airplane at the gate and FA 2 was transported to the hospital where she was diagnosed with a broken arm. FA 1 transported herself to the hospital after the flight and was examined and released with minor injuries.

Aircraft

Registration
N226NN
Reported as
Embraer ERJ170 (200LR)
Category
Airplane
Serial number
17000540
Built
2016
Airframe hours
10,973
Engines
General Electric CF-34-8E5, 14,500 lbs thrust, turbo fanGeneral Electric CF-34-8E5, 14,500 lbs thrust, turbo fan
Damage
No damage
Flight
Part 121
Operator
Envoy Airlines
Registered owner
American Airlines Inc
Airworthiness certificate
Standard, Transport
Last inspection
AAIP · May 6, 2020
Departed
KELP · El Paso, TX
Destination
KORD · Chicago, IL
Flight plan
IFR
Equipment
Onboard weather, Electronic primary flight display, Electronic multifunction display, Electronic flight bag or handheld device, Stall warning system, ADS-B, Auto-pilot, Data recorder

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
30
Injuries
None
Certificates
Commercial, Flight instructor, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
September 18, 2019
Seat
Left
Restraint
5-point
Flight hours
4,018 total · 1,778 in this make and model · 1,778 as pilot in command · 88 in the last 90 days · 20 in the last 30 days · 10 in the last 24 hours
Role
Co-pilot
Age
28
Injuries
None
Certificates
Flight instructor, Commercial, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
December 15, 2018
Seat
Right
Restraint
5-point
Flight hours
1,716 total · 754 in this make and model · 93 in the last 90 days · 61 in the last 30 days · 10 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 9 knots, gusting 16
Visibility
10 statute miles
Lowest ceiling
11,000 ft broken
Temperature
90 °F, dew point 73 °F
Altimeter
29.78 inHg
Turbulence
Moderate
Observed at
KJOT, 6 nm away

Docket · 2

The files NTSB released with the investigation on August 10, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 6.3 MB in all.