Description

On 2 September 1999, a United Airlines Boeing Boeing 737-300 in the cruise at FL240, experienced severe turbulence due to an encounter with the wake vortex from a preceding MCDONNELL DOUGLAS MD-11 on a similar track which had climbed through the level of the B737 with minimum lateral separation, 1.5 minutes earlier.

Synopsis

This is an extract from the official report into the accident published by the National Transportation Safety Board (NTSB).