DCA18CA289

NTSB accident investigation · Boeing 737 · Phoenix, AZ · September 11, 2018

Accident · Serious injuriesData collectionFinal report
Date
September 10, 2018, 21:00 local (Sep 11, 2018, 04:00 UTC)
Place
Phoenix, AZ
Injuries
1 serious, 2 uninjured
Damage
No damage
Phase of flight
Approach
Aircraft
N950NNBoeing 737
Defining event
Approach: Aircraft wake turb encounter
Weather
Visual (VMC) · Night
Status
Completed · report April 22, 2020
Report
Approved by Office Director
NTSB office
Major Investigations Division
Case key
98336

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 inadvertent encounter with wake 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: wake turbulenceEnvironmental issues › Conditions/weather/phenomena · Effect on personnelBoeing 737-823: 1 caseAll aircraft: 47 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 September 10, 2018, at 9:00 pm Mountain Standard Time (MST), American Airlines flight 2197, a Boeing 737-800, N950NN, encountered wake turbulence while descending through 3,100 feet on approach to the Phoenix Sky Harbor International Airport (KPHX), Phoenix, Arizona. A flight attendant was securing items in the galley and was seriously injured as a result of the turbulence. There were no injuries to the other passengers or crew, and the airplane was not damaged. The flight was operating under 14 CFR Part 121 as a regularly scheduled passenger flight from Seattle-Tacoma International Airport (KSEA), Seattle, Washington, to KPHX. According to the flight crew, the seat belt sign was on, and the "prepare for landing" announcement was made to the flight attendants. The airplane was approximately three miles behind a narrow body Airbus, in landing configuration when the turbulence occurred. After landing, the flight crew were notified that one of the flight attendants had been injured. Paramedics met the flight at the gate and the flight attendant was transported to the hospital where she was diagnosed with a broken left rib.

Factual narrative

On September 10, 2018, at 9:00 pm Mountain Standard Time (MST), American Airlines flight 2197, a Boeing 737-800, N950NN, encountered wake turbulence while descending through 3,100 feet on approach to the Phoenix Sky Harbor International Airport (KPHX), Phoenix, Arizona. A flight attendant was securing items in the galley and was seriously injured as a result of the turbulence. There were no injuries to the other passengers or crew, and the airplane was not damaged. The flight was operating under 14 CFR Part 121 as a regularly scheduled passenger flight from Seattle-Tacoma International Airport (KSEA), Seattle, Washington, to KPHX. According to the flight crew, the seat belt sign was on, and the "prepare for landing" announcement was made to the flight attendants. The airplane was approximately three miles behind a narrow body Airbus, in landing configuration when the turbulence occurred. After landing, the flight crew were notified that one of the flight attendants had been injured. Paramedics met the flight at the gate and the flight attendant was transported to the hospital where she was diagnosed with a broken left rib.

Aircraft

Registration
N950NN
Reported as
Boeing 737 (823)
Category
Airplane
Serial number
31194
Built
2014
Airframe hours
14,425
Engines
Cfm Intl CFM56-7B24ECfm Intl CFM56-7B24E
Damage
No damage
Flight
Part 121
Operator
American Airlines
Registered owner
Wilmington Trust Co Trustee
Airworthiness certificate
Standard, Transport; Standard, Utility
Last inspection
August 28, 2018
Departed
SEA · Seattle, WA
Destination
PHX · Phoenix, AZ
Flight plan
IFR
Airport
PHX · Phoenix Sky Harbor Intl, runway 26, 11,489 × 150 ft, concrete
Equipment
Angle of attack indicator, Data recorder, Electronic flight bag or handheld device, Electronic multifunction display, Electronic primary flight display, Heads up display, Onboard weather, Satellite tracking device, Stall warning system, ADS-B

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.

Weather

Conditions
Visual (VMC) · Night
Observed at
KPHX

Docket · 1

The files NTSB released with the investigation on May 4, 2020, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.1 MB in all.