Hi Ingo,
3E2234 comes out as D-IEDO, however Dornier Do-28D-2 Skyservant c/n 4143 was 58+68 which is now preserved at Luftfahrtmuseum Hannover-Laatzen
3ED00C D-KTTC, Hoffman HK-36TTC Super Dimona c/n 36676
478739 unknown to me
4B1781 comes out as HB-IXL which is unknown, miscode?
4CA1FB unknown, miscode?
Thanks again
Alan