Accident Boeing 777-223ER N797AN,
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Date:Sunday 25 July 2004
Type:Silhouette image of generic B772 model; specific model in this crash may look slightly different    
Boeing 777-223ER
Owner/operator:American Airlines
Registration: N797AN
MSN: 30012/321
Year of manufacture:2001
Engine model:Rolls-Royce RB211
Fatalities:Fatalities: 0 / Occupants: 217
Aircraft damage: None
Location:Miami, FL -   United States of America
Phase: En route
Nature:Passenger - Scheduled
Departure airport:Miami International Airport, FL (MIA/KMIA)
Destination airport:Sao Paulo, (GRU)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
The flight encountered unforecasted clear air turbulence while the flight attendants were providing meal service to the passengers. Several of the flight attendants were thrown to the floor by the turbulence, and a flight attendant operating in the rear of the airplane received a fractured left shoulder. The autopilot was engaged at the time of the event, and there were no pilot inputs during the turbulence encounter. Statements from the captain (the flying pilot) and the first officer indicated that the event involved clear air turbulence that lasted 3-4 seconds. The captain characterized the turbulence encounter as "moderate" and being similar to a wake turbulence encounter because of the extremely short duration. He indicated that there were no aircraft in front of them and the nearest thunderstorms were greater than 20 miles to the northwest. The first officer added that they had received no turbulence warnings from other aircraft and that they were clear of all weather.

Probable Cause: the in-flight encounter with unforecasted clear air turbulence.

Accident investigation:
Investigating agency: NTSB
Report number: DCA04MA061
Status: Investigation completed
Duration: 1 year and 7 months
Download report: Final report



Revision history:

22-Feb-2018 19:38 ASN Update Bot Added
01-Jul-2022 09:02 harro Updated [Country, Narrative]

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