NTSB Identification: NYC99LA240.
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Scheduled 14 CFR UNITED AIRLINES
Accident occurred Thursday, September 30, 1999 in SPARTA, NJ
Probable Cause Approval Date: 08/13/2001
Aircraft: Airbus Industrie 319-131, registration: N821UA
Injuries: 1 Serious,44 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The captain reported light chop to occasional light turbulence at flight level 310. About 15 minutes from the destination airport, a flight attendant was thrown against door 2L and became momentarily unconscious. The captain declared a medical emergency, and after landing, the flight attendant was transported to the hospital. She was diagnosed with a herniated C-6 disk, and underwent surgery to repair the disk. Weather reports indicated no forecasted turbulence along the route of flight. At flight level 310, winds were from the west/southwest at 50-70 knots.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The airplane's encounter with clear air turbulence.

Full narrative available

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