DCA17CA155

NTSB accident investigation · Embraer S A ERJ170-200LR · Minneapolis, MN · July 20, 2017

Accident · Serious injuriesClass 4 · Data collectionFinal report
Date
July 19, 2017, 22:45 local (Jul 20, 2017, 03:45 UTC)
Place
Minneapolis, MN
Injuries
1 serious, 3 minor, 45 uninjured
Damage
No damage
Phase of flight
Enroute
Aircraft
N427YXEmbraer S A ERJ170-200LR
Defining event
Enroute-descent: Turbulence encounter
Weather
Instrument (IMC) · Night
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Major Investigations Division
FAA report
20170719012549A
Case key
95632

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

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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 19, 2017, about 2245 central daylight time, Republic Airlines flight 4678, an Embraer 170, N427YX, encountered turbulence at about 13,000 ft, during descent to Minneapolis International Airport (KMSP), Minneapolis, Minnesota. Of the 49 passengers and crew onboard, one flight attendant received serious injuries and three passengers received 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 Miami International Airport (KMIA), Miami, Florida, to KMSP. The captain stated that as the flight neared Minneapolis, he turned on the seatbelt sign, just before top of descent, for the arrival into KMSP. He contacted the flight attendants (FA) and briefed them on the weather around Minneapolis and told them to be seated within “about 10 to 13 minutes of the weather”. The first officer then made the descent announcement on the public address system, instructing the passengers to be seated and to fasten their seatbelts due to possible turbulence. Subsequently, during the descent, the airplane entered a cloud and encountered “one swift jolt of turbulence followed by moderate turbulence for a few seconds”. The airplane radar was on but there were no returns in front of the airplane. The captain disconnected the autopilot and maintained positive control of the airplane. Shortly after, the flight crew received a call from a flight attendant reporting injuries to passengers and a FA. The FAs indicated that after the captain informed them of the expected turbulence, they prepared their gallies for landing and made their compliance checks in the cabin. As the aft FA was sitting down in her jumpseat, the turbulence was encountered, and she was thrown into the air and down to the galley floor, injuring her right wrist and left arm. In addition, several passengers were thrown into their passenger service units and one lap-child was thrown several rows away from her mother. The injured FA and passengers were attended to by the uninjured FAs for the remainder of the flight. After landing, the airplane was met at the gate by emergency medical personnel and the injured FA and several passengers were transported to the hospital. The FA was diagnosed with a fractured right wrist and left arm.

Aircraft

Registration
N427YX
Reported as
Embraer S A ERJ170-200LR (200LR)
Category
Airplane
Serial number
17000402
Built
2014
Engines
General Electric CF34-8E, turbo fanGeneral Electric CF34-8E, turbo fan
Damage
No damage
Flight
Part 121
Operator
Republic Airline Inc
Registered owner
Republic Airline Inc
Airworthiness certificate
Standard, Transport
Departed
MIA · Miami, FL
Destination
Minneapolis, MN
Flight plan
IFR

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
38
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
October 22, 2016
Seat
Left
Restraint
5-point
Flight hours
4,500 total · 2,234 in this make and model
Role
Co-pilot
Age
28
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
May 19, 2017
Seat
Right
Restraint
5-point
Flight hours
2,000 total · 1,538 in this make and model

Weather

Conditions
Instrument (IMC) · Night
Altimeter
29.92 inHg

Docket · 1

The files NTSB released with the investigation on July 13, 2021, on NTSB’s docket system: statements, records, photos and specialists’ reports. 5.3 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.