Wake turbulence II
Preliminary reports indicate that the Learjet was approaching runway 05R behind a Mexicana 767-300 bound for the same runway.
The 767 was approaching at 183 knots while the Learjet was doing the same at 250 knots.
The controller instructed the Learjet to reduce speed to 180 and the pilot acknowledged, however radar data shows the Learjet did not do so.
As a result distance between them diminished considerably, at one point this distance was only 3.9 miles according to radar data.
The crash ocurred shortly thereafter.
Wake turbulence has been deemed probable cause, although authorities have indicated that a final report will take more time.