737 misses winglet

[Vaneev]

5th September 737-800 misses one winglet during approach
Incident: Aeromexico B738 at Mexico City on Sep 5th 2012, dropped winglet (http://avherald.com/h?article=45584635&opt=0)
Does anyone know results of investigation? I cannot find any information.
Thank you in advance.

[Al Murdoch]

It's not really a big deal - unless you happened to be under it when it fell off.

[Vaneev]

I dont think so. Because winglet dropped in result of severe vibration. And it might be a kind of aileron flutter.