Summary
On June 24, 1993, a Boeing 757-222 (N579UA) was involved in an accident near Baraboo, WI. The accident resulted in 1 serious injury, with 147 people uninjured out of 148 aboard.
The National Transportation Safety Board determined the probable cause of this accident to be: An encounter with moderate turbulence in the clouds.
On June 24, 1993 at 1229 central daylight time, a Boeing 757-222, N579UA, operated by United Airlines, Inc., as flight number 1218, encountered moderate turbulence in the clouds at flight level 290, over Baraboo, Wisconsin, while descending on a vector for an approach runway 14R at Chicago O'Hare International Airport. The operator reported the seat belt sign was on, the weather radar was on, and the airplane was clear of any green returns on the radar. One flight attendant sustained serious injuries. There were no injuries to the two cockpit crewmembers, five other flight attendants, or 140 passengers aboard the airplane. The flight was operating under 14 CFR Part 121, and originated at Vancouver, British Columbia, Canada, at 0920. The destination was O'Hare Airport.
This accident is documented in NTSB report CHI93LA224. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N579UA.
Accident Details
Probable Cause and Findings
an encounter with moderate turbulence in the clouds.
Aircraft Information
Registered Owner (Historical)
Analysis
On June 24, 1993 at 1229 central daylight time, a Boeing 757-222, N579UA, operated by United Airlines, Inc., as flight number 1218, encountered moderate turbulence in the clouds at flight level 290, over Baraboo, Wisconsin, while descending on a vector for an approach runway 14R at Chicago O'Hare International Airport. The operator reported the seat belt sign was on, the weather radar was on, and the airplane was clear of any green returns on the radar. One flight attendant sustained serious injuries. There were no injuries to the two cockpit crewmembers, five other flight attendants, or 140 passengers aboard the airplane. The flight was operating under 14 CFR Part 121, and originated at Vancouver, British Columbia, Canada, at 0920. The destination was O'Hare Airport. An IFR flight plan was filed, and instrument meteorological conditions prevailed at the time.
During the turbulence encounter, the flight attendant fell and injured her left ankle. She was treated for the injury on completion of the flight. The injury was diagnosed as a fractured ankle.
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# CHI93LA224