Accident Boeing 757-232 N657DL,
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Date:Saturday 16 May 2009
Time:11:45 LT
Type:Silhouette image of generic B752 model; specific model in this crash may look slightly different    
Boeing 757-232
Owner/operator:Delta Air Lines
Registration: N657DL
MSN: 24419/286
Year of manufacture:1990
Total airframe hrs:63598 hours
Engine model:Pratt & Whitney PW2037
Fatalities:Fatalities: 0 / Occupants: 189
Aircraft damage: None
Location:over Cuba -   Cuba
Phase: En route
Nature:Passenger - Scheduled
Departure airport:Atlanta Hartsfield-Jackson International Airport, GA (ATL/KATL)
Destination airport:Grand Cayman Island-Owen Roberts International Airport (GCM/MWCR)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
The airplane was at flight level 350 with the autopilot engaged, and about 35 to 40 minutes from its destination, when it encountered severe turbulence. The captain had turned the seat belt light on 5 to 10 minutes before the turbulence, and the first officer had made the public address announcing that everyone needed to remain seated with their seatbelts fastened. Suddenly, the airplane encountered severe turbulence and climbed rapidly to about 500 feet above the assigned altitude; the autopilot then disengaged. The captain took control of the airplane and slowly lowered the nose. As the captain leveled the airplane, the nose pitched down and the airplane descended about 500 feet below the assigned altitude before leveling and departing the area of turbulence. At the time of the encounter, the airplane was in a layer of haze. There was no heavy precipitation noted on the radar, and no build-ups visible to the flight crew. One passenger was seriously injured, and two passengers and two flight attendants sustained minor injuries.

Probable Cause: An unanticipated inflight encounter with turbulence.

Accident investigation:
Investigating agency: NTSB
Report number: ERA09LA418
Status: Investigation completed
Duration: 1 year and 2 months
Download report: Final report




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