Ohhhhh Let me guess. It's a bright yellow Canadair CL-215
I spent several weeks in Majorca in 1996 and 1998, the first being a family holiday, and the second a swimming club trip. Through out both trips, we were often buzzed by the Yellow Canadair during it's daily flights, it was always fantastic to watch. If I remember correctly, the main hanger was off to the left handside of the main beach.
I snapped this at a Museum near Frankfurt
EDIT; It seems they now have Bombardier Canadair CL-415 now, the bigger brother of the CL-215