Accident Boeing 737-823 (WL) N852NN, Tuesday 5 February 2019
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Date:Tuesday 5 February 2019
Time:09:47 LT
Type:Silhouette image of generic B738 model; specific model in this crash may look slightly different    
Boeing 737-823 (WL)
Owner/operator:American Airlines
Registration: N852NN
MSN: 40581/3396
Year of manufacture:2010
Engine model:CFM 56-7B
Fatalities:Fatalities: 0 / Occupants: 119
Other fatalities:0
Aircraft damage: None
Location:Bluefields -   Costa Rica
Phase: Initial climb
Nature:Passenger - Scheduled
Departure airport:San José-Juan Santamaria International Airport (SJO/MROC)
Destination airport:Miami International Airport, FL (MIA/KMIA)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
American Airlines flight AA1204, a Boeing 737-823, encountered severe turbulence during climb.  Of the 119 passengers and crew onboard, one flight attendant received a serious injury and another flight attendant received minor injuries.  The airplane was not damaged.

The captain was the pilot flying and the copilot was pilot monitoring. The flight was climbing through FL310 to the planned cruising altitude when the flight encountered moderate to severe clear air turbulence. According to the flight crew, the seatbelt sign was on when the turbulence occurred The turbulence subsided after about one and a half minutes and occurred during daylight, in visual meteorological conditions, and with no indications of convective weather in the area.
At the time of the turbulence, two flight attendants (FA) had just started to prepare for beverage service in the aft galley when they were thrown to the floor. Both FAs crawled to the last row of seats as the turbulence continued. The two FAs were then assisted for the remainder of the flight by to passenger medical professionals. After landing, the FAs were transported to the hospital where one was diagnosed with a broken foot and the other with minor bruises.

Probable Cause: An inadvertent encounter with clear air turbulence.

Accident investigation:
Investigating agency: NTSB
Report number: DCA19CA075
Status: Investigation completed
Duration: 3 years
Download report: Final report



History of this aircraft

Other occurrences involving this aircraft

27 May 2022 N852NN American Airlines 0 SE of Providenciales unk
Engine failure


Revision history:

04-May-2023 05:32 ASN Update Bot Added
04-May-2023 05:41 harro Updated

Corrections or additions? ... Edit this accident description

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