Siliconserver 
4K
A Tier
OY-RUA
Unknown/Not prominently displayed; possible charter or wet-lease operator
AT75
FRA/EDDF
ATR (Aerei da Trasporto Regionale) ATR 72-500
ATR 72-500 (OY-RUA) on final approach, showcasing its distinctive high-wing twin-turboprop configuration—an iconic workhorse for regional airlines.