a refrigeration unit for an aircraft galley comprises a frame establishing a main compartment , and a side window that receives a side access compartment , where a the dividing wall separates the side compartment interior space from a main chilled compartment . a side door mounted to the side access compartment allows access to the side compartment but not the main compartment , allowing segregation of snacks and items accessible to passengers via self - serve from those that are only distributed by flight attendants .