Could it be the ex-AeroGal (Ecuador) B757-2K2 (
WIN); 608/26635; Reg: HC-CIY? It is rumoured to have had an engine problem.
It is indeed HC-CIY from AeroGal.
GDFK & LSAD have also been painted into Jet2Holidays colours. Does anyone know when these 737's begin service some have been stored for a while and left with?