On the theme of ATR storage airports here is a log with credit to Colin for Saarbrucken.
PR-PDA, PDC, PDH, PDK Passaredo
HB-ACA, ACB, ACC, ACD ex Adria Switzerland all white
2-XAVT ex Arkia all white
OY-JZD basic SAS colours
F-WKVB ATR72 in Air Mandalay colours and the former G-ZEBS ATR42 in Blue Islands colours are both hangared undergoing cargo conversion.