Morning Ingo,
I am not sure what you mean regarding D-ESTT, there is no SR20 with this registration in the database. It became F-HGTL and was changed in the database 15/10/2015
3D3631,D-ESTT,4636075,Piper PA-46 Malibu Mirage JetPROP DLX
3FF4B5,D-MLTM,,Rans S-6 Coyote II
45E293,OY-XTS,5E118S17,DG Flugzeugbau DG-500/22 ELAN
Many thanks
Alan