Accident Boeing 777-223ER N770AN, Saturday 22 April 2023
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Date:Saturday 22 April 2023
Time:12:00 LT
Type:Silhouette image of generic B772 model; specific model in this crash may look slightly different    
Boeing 777-223ER
Owner/operator:American Airlines
Registration: N770AN
MSN: 29578/185
Year of manufacture:1999
Total airframe hrs:89844 hours
Engine model:Rolls-Royce RB-211
Fatalities:Fatalities: 0 / Occupants: 221
Other fatalities:0
Aircraft damage: None
Category:Accident
Location:over Atlantic Ocean -   United States of America
Phase: En route
Nature:Passenger - Scheduled
Departure airport:Charlotte-Douglas International Airport, NC (CLT/KCLT)
Destination airport:Madrid-Barajas Adolfo Suárez Airport (MAD/LEMD)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Narrative:
American Airlines flight AA748, a Boeing 777-223(ER), N770AN, encountered turbulence over the Atlantic Ocean while enroute from Charlotte, North Carolina, to Madrid, Spain.

As a result of the turbulence, three flight attendants sustained injuries, two being serious, while one passenger sustained a minor injury. The airplane was not damaged, and the flight crew continued to MAD where they were met by emergency medical technicians (EMTs) upon landing. The flight was a regularly scheduled passenger flight from Charlotte International Airport (CLT), Charlotte, North Carolina to MAD.
The flight crew reported having a view of lightning at about an 11 o'clock position. The onboard radar also indicated rain ahead of them. Upon confirming that the sky above them was clear of any cloud cover or weather, the flight crew requested an up to 20-mile deviation of course to avoid the weather ahead, to which air traffic control (ATC) approved. As they approached the area where the radar had previously shown that there was rain, the radar was no longer showing rain and the flight crew could see no signs of rain directly ahead of them.
The flight crew reported attempts to reference both of their personal weather apps to confirm the weather shown on the cockpit radar but was unsuccessful due to the lack of internet connection. Because of this, the flight crew concluded the weather to have passed and subsequently decided to no longer deviate from the original course. The unexpected turbulence event was experienced soon after.
The flight crew reported that the turbulence was sudden and came without warning. The cabin crew reported they were preparing for arrival service into MAD when they experienced a “sudden loss in altitude' and a series of jolts. The flight and cabin crew both reported that the turbulence lasted around 30 - 40 seconds and that flight crew reported that the autopilot disengaged but did not cause a deviation in altitude of more than 200 feet.
Three flight attendants reported they were preparing the back galley for meal service when the unexpected turbulence occurred, causing all three flight attendants to be thrown in the air and “slammed' on the floor. The flight attendants also reported that a passenger was thrown in the air and hit their head. After landing, the three flight attendants were seen by EMTs, and all were taken to the local hospital for further care. The flight crew was aware of thunderstorms in the area, subsequently the seatbelt sign was on, but no announcement was made to inform passengers or cabin crew of potential turbulence.
The flight crew informed ATC about the injuries and requested EMTs to meet the airplane upon arrival.

Probable Cause: An encounter with inadvertent convective turbulence during cruise flight.

Accident investigation:
cover
  
Investigating agency: NTSB
Report number: DCA23LA252
Status: Investigation completed
Duration: 1 year and 3 months
Download report: Final report

Sources:

NTSB DCA23LA252

Location

Revision history:

Date/timeContributorUpdates
26-Apr-2023 12:48 Captain Adam Added
20-May-2024 16:42 ASN Updated [Location]
20-Jul-2024 08:32 ASN Update Bot Updated [Time, Operator, Other fatalities, Country, Nature, Departure airport, Destination airport, Source, Narrative]
20-Jul-2024 08:58 ASN Updated [Operator, Location, Nature, Destination airport, Narrative]

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