Vrs turbo problem?

Hi to all!

Got back my VRS from the Skoda dealership, service and health checking had been done with one little oil leak. Tech said the leak comes from turbocharger area but he was not sure for 100%.

I do fix my own cars when I have time but never been close to the turbo.

I've start listen the engine carefully and notice the noise "like" air soak on accelleration when you drive next to the wall with window open, car pulls like a mad, cos I have the "box", with no probs....

The questions are:

Is there any rubber pipes around the turbo which can be broken or anything else which may cause the airsoak????

Why and where the oil can leak from the turbo if its from there?!

Thank you

Andrey